BMW 1er E87
Weaknesses, engine ratings and buying advice
The BMW 1 Series E87 (2004–2011) was the first rear-wheel-drive premium hatchback — a concept no competitor had. Built on a shortened E90 3 Series platform, it drives like a proper BMW. The problem: one engine can cost more to fix than the car is worth.
The N47D20 diesel (116d, 118d, 120d, 123d) is the dominant engine in the used market and the single biggest risk. Same rear-mounted timing chain as the X1 E84 — plastic guide rails crack, chain stretches, engine destroyed without warning. Pre-2010 builds with sharp-edged sprockets are worst. Chain replacement: $1,500–5,500. Every other N47 problem (EGR clogging, swirl flap breakage, DPF on short trips, dual-mass flywheel) pales in comparison. The earlier M47TUD20 in the 120d (2004–2007) is significantly more reliable — conventional timing chain position, no known chain catastrophe.
The petrol side: N46B20 (118i/120i, 2005–2007) is the honest choice — simple, reliable, adequate. The N43B20 direct-injection replacement (2007+) introduced high-pressure fuel pump issues and injector problems that the N46 never had. The N52B30 in the 130i is a gem — 3.0L naturally aspirated six-cylinder in a hatchback, with real character. The N45B16 and N43B16 1.6L engines are fine for city use but feel underpowered on the motorway.
Vehicle-level: rear subframe mounts crack on cars driven hard (track days, aggressive driving). Front control arm bushings wear from 80,000 km. The electric power steering rack fails occasionally ($900–1,500). Interior quality is below 3 Series standards — rattles develop with age.
Test-drive checklist: N47 diesel: cold start mandatory — any rattle from the rear beyond 3 seconds means the chain is on its way out. N43 petrol: rough idle or stumbling = HPFP or injector issue. 130i N52: listen for VANOS rattle at warm idle. All models: rear subframe — clunking over bumps from the rear. Steering: any notchiness or dead spot.
2026 market: N47 diesel from $2,000–4,500 (timing chain risk priced in). 120i N46 from $3,500–5,500. 130i N52: $6,500–11,000 (rising — last affordable inline-six hatchback). Insider pick: 130i N52B30 with manual gearbox, 2008+, under 150,000 km — the only rear-wheel-drive six-cylinder hatchback ever made, and values are climbing.
306 PS
135i · Benzin
N55 in the Coupé — 306 hp RWD
Fun to Drive!90–224 PS
2.0L Diesel Diesel
9 weaknesses
Stay Away!Body Variants
The BMW 1er E87 is available as Hatchback and Coupé and Convertible — choose your body type for specific insurance data:
Generations
Engine Overview
The BMW 1er E87 is available with 12 engine variants — from 90 to 360 hp. 5 variants had engine changes — the model year is crucial.
Widely used four-cylinder diesel with common-rail injection and piezo injectors. The notorious timing chain issue is the central concern: the chain sits at the gearbox side (rear of engine), stretches with irregular maintenance, and can snap — total engine loss. BMW revised the design multiple times (sharp-edged sprockets until 2009, improved from 2010) but never fully resolved it. Metallic rattling on cold start is the warning sign. Second major issue: the high-pressure fuel pump can shed metal shavings throughout the entire fuel system — requiring replacement of injectors, rail, and lines. On the positive side: the engine is economical in daily use (5-6 L/100km real), delivers solid torque from 1,750 rpm, and runs 250,000+ km with proper care. Short oil change intervals (max 15,000 km, better 10,000) and BMW-spec oil (LL-04) are mandatory. Used car purchase: have timing chain condition checked via endoscope or chain tensioner reset value.
- !! Timing chain breaks — known serial defect from 100,000 km
The N47D20 is notorious for its serial timing chain defect. The rear-mounted timing chain stretches and plastic guide rails break. Chain breakage causes total engine failure. Affected: build years 2007–2015.
Symptoms: Scraping or rattling noises on cold start from the rear of the engine. The damage often gives no acoustic warning and occurs suddenly. - !! Water pump defective — overheating risk from 120,000 km
The N47 water pump fails prematurely. When it does the engine overheats, causing secondary damage to an already vulnerable engine. Preventive replacement is recommended.
Symptoms: Coolant temperature rises suddenly, coolant loss, engine warning light, in the worst case overheating damage. - !! High-pressure pump failure — metal swarf in the system from 200,000 km
The high-pressure pump can wear internally and introduce metal swarf into the fuel system. Rail, pressure sensor, and all injectors are affected — complete system replacement is necessary.
Symptoms: Engine goes into limp mode; will not restart; fault code "rail pressure too low"; in the worst case the engine no longer runs
+ 6 more engine weaknesses + vehicle weaknesses
Widely used four-cylinder diesel with common-rail injection and piezo injectors. The notorious timing chain issue is the central concern: the chain sits at the gearbox side (rear of engine), stretches with irregular maintenance, and can snap — total engine loss. BMW revised the design multiple times (sharp-edged sprockets until 2009, improved from 2010) but never fully resolved it. Metallic rattling on cold start is the warning sign. Second major issue: the high-pressure fuel pump can shed metal shavings throughout the entire fuel system — requiring replacement of injectors, rail, and lines. On the positive side: the engine is economical in daily use (5-6 L/100km real), delivers solid torque from 1,750 rpm, and runs 250,000+ km with proper care. Short oil change intervals (max 15,000 km, better 10,000) and BMW-spec oil (LL-04) are mandatory. Used car purchase: have timing chain condition checked via endoscope or chain tensioner reset value.
- !! Timing chain breaks — known serial defect from 100,000 km
The N47D20 is notorious for its serial timing chain defect. The rear-mounted timing chain stretches and plastic guide rails break. Chain breakage causes total engine failure. Affected: build years 2007–2015.
Symptoms: Scraping or rattling noises on cold start from the rear of the engine. The damage often gives no acoustic warning and occurs suddenly. - !! Water pump defective — overheating risk from 120,000 km
The N47 water pump fails prematurely. When it does the engine overheats, causing secondary damage to an already vulnerable engine. Preventive replacement is recommended.
Symptoms: Coolant temperature rises suddenly, coolant loss, engine warning light, in the worst case overheating damage. - !! High-pressure pump failure — metal swarf in the system from 200,000 km
The high-pressure pump can wear internally and introduce metal swarf into the fuel system. Rail, pressure sensor, and all injectors are affected — complete system replacement is necessary.
Symptoms: Engine goes into limp mode; will not restart; fault code "rail pressure too low"; in the worst case the engine no longer runs
+ 6 more engine weaknesses + vehicle weaknesses
The M47TUD20 is the revised version of BMW's first common-rail diesel, producing between 120 and 165 hp depending on the tune. At its core a solid four-cylinder diesel that can easily surpass 300,000 km with proper maintenance. The biggest weakness is the notorious swirl flaps in the intake manifold — when carbon buildup causes them to seize, fragments can enter the combustion chamber and cause catastrophic engine damage. Many workshops recommend preventive removal or regular cleaning beyond 150,000 km. Injectors tend to leak at high mileage, causing rough running and power loss. The crankcase ventilation system and turbo oil return line should also be monitored. When buying, watch for blue or white smoke on cold starts — this points to worn injector seals. Oil change intervals should be kept under 15,000 km; BMW longlife intervals are too generous for this engine.
- !! Timing chain stretches from 155,000 km
The timing chain can stretch or the chain tensioner can fail. Compared to the N47 the M47 is considered more robust, but timing chain problems occur at high mileages and with neglected maintenance.
Symptoms: Rattling on cold start from the front of the engine, easing after warm-up. With heavy stretching, engine damage through chain jump. - !! Swirl flaps break off and fall into the engine from 100,000 km
The metal swirl flaps in the intake manifold work loose through carbon deposits and can break off. An ingested flap blade causes immediate total damage to valves and pistons.
Symptoms: Engine stumbling, sudden severe power loss, loud metallic noise from engine, engine failure. - !! Cylinder head cracks (M47TU variant) from 180,000 km
The aluminium cylinder head of the M47TU tends to develop hairline cracks between valve seats and glow plug bores at high mileages. The cause is the different thermal expansion coefficient of the aluminium head and cast iron block.
Symptoms: White smoke from exhaust, rising oil level through coolant contamination, coolant loss without visible leakage.
+ 5 more engine weaknesses + vehicle weaknesses
Widely used four-cylinder diesel with common-rail injection and piezo injectors. The notorious timing chain issue is the central concern: the chain sits at the gearbox side (rear of engine), stretches with irregular maintenance, and can snap — total engine loss. BMW revised the design multiple times (sharp-edged sprockets until 2009, improved from 2010) but never fully resolved it. Metallic rattling on cold start is the warning sign. Second major issue: the high-pressure fuel pump can shed metal shavings throughout the entire fuel system — requiring replacement of injectors, rail, and lines. On the positive side: the engine is economical in daily use (5-6 L/100km real), delivers solid torque from 1,750 rpm, and runs 250,000+ km with proper care. Short oil change intervals (max 15,000 km, better 10,000) and BMW-spec oil (LL-04) are mandatory. Used car purchase: have timing chain condition checked via endoscope or chain tensioner reset value.
- !! Timing chain breaks — known serial defect from 100,000 km
The N47D20 is notorious for its serial timing chain defect. The rear-mounted timing chain stretches and plastic guide rails break. Chain breakage causes total engine failure. Affected: build years 2007–2015.
Symptoms: Scraping or rattling noises on cold start from the rear of the engine. The damage often gives no acoustic warning and occurs suddenly. - !! Water pump defective — overheating risk from 120,000 km
The N47 water pump fails prematurely. When it does the engine overheats, causing secondary damage to an already vulnerable engine. Preventive replacement is recommended.
Symptoms: Coolant temperature rises suddenly, coolant loss, engine warning light, in the worst case overheating damage. - !! High-pressure pump failure — metal swarf in the system from 200,000 km
The high-pressure pump can wear internally and introduce metal swarf into the fuel system. Rail, pressure sensor, and all injectors are affected — complete system replacement is necessary.
Symptoms: Engine goes into limp mode; will not restart; fault code "rail pressure too low"; in the worst case the engine no longer runs
+ 6 more engine weaknesses + vehicle weaknesses
Widely used four-cylinder diesel with common-rail injection and piezo injectors. The notorious timing chain issue is the central concern: the chain sits at the gearbox side (rear of engine), stretches with irregular maintenance, and can snap — total engine loss. BMW revised the design multiple times (sharp-edged sprockets until 2009, improved from 2010) but never fully resolved it. Metallic rattling on cold start is the warning sign. Second major issue: the high-pressure fuel pump can shed metal shavings throughout the entire fuel system — requiring replacement of injectors, rail, and lines. On the positive side: the engine is economical in daily use (5-6 L/100km real), delivers solid torque from 1,750 rpm, and runs 250,000+ km with proper care. Short oil change intervals (max 15,000 km, better 10,000) and BMW-spec oil (LL-04) are mandatory. Used car purchase: have timing chain condition checked via endoscope or chain tensioner reset value.
- !! Timing chain breaks — known serial defect from 100,000 km
The N47D20 is notorious for its serial timing chain defect. The rear-mounted timing chain stretches and plastic guide rails break. Chain breakage causes total engine failure. Affected: build years 2007–2015.
Symptoms: Scraping or rattling noises on cold start from the rear of the engine. The damage often gives no acoustic warning and occurs suddenly. - !! Water pump defective — overheating risk from 120,000 km
The N47 water pump fails prematurely. When it does the engine overheats, causing secondary damage to an already vulnerable engine. Preventive replacement is recommended.
Symptoms: Coolant temperature rises suddenly, coolant loss, engine warning light, in the worst case overheating damage. - !! High-pressure pump failure — metal swarf in the system from 200,000 km
The high-pressure pump can wear internally and introduce metal swarf into the fuel system. Rail, pressure sensor, and all injectors are affected — complete system replacement is necessary.
Symptoms: Engine goes into limp mode; will not restart; fault code "rail pressure too low"; in the worst case the engine no longer runs
+ 6 more engine weaknesses + vehicle weaknesses
Entry-level four-cylinder of the N generation with Valvetronic and VANOS — technically far more complex than its N46 predecessor. Timing chain is the main concern: chain and tensioner wear on many units from just 80,000 km, guide rail cracks — if not replaced in time, engine damage follows. Valvetronic eccentric shaft sensor fails — engine enters limp mode with drastically reduced power. Valvetronic servo motor can also fail. VANOS solenoid defect — rough idle and power gaps. Oil filter housing gasket leaks chronically. Ignition coils weak on early production. Regular chain inspection from 60,000 km recommended.
- !! Timing chain stretched / chain tensioner defective from 130,000 km
The timing chain stretches prematurely due to a faulty chain tensioner. Plastic guide rails become brittle and break. Engine damage from chain jump is possible.
Symptoms: Rattling or clattering on cold start in the first few seconds, which improves or worsens as the engine warms up. - !! Timing chain guide and tensioner worn from 90,000 km
The N45B16 chain tensioner gradually loses its pre-load force. BMW revised the part three times without issuing an official recall. The latest tensioner variant has a narrower bolt head as a distinguishing feature.
Symptoms: Rattling on cold start, engine warning light, irregular engine noise after starting. - !! VANOS rattle on cold start from 100,000 km
Worn VANOS seals cause delayed oil pressure build-up on cold starts, producing a distinctive metallic rattle until the VANOS units pressurize.
Symptoms: Metallic rattle for several seconds after cold start, diminishing once engine warms up
+ 4 more engine weaknesses + vehicle weaknesses
The N46B20 is a two-litre four-cylinder with Valvetronic variable valve lift, producing between 129 and 150 hp as the successor to the M54B22. In daily use a pleasantly smooth and economical engine that eliminates the conventional throttle body through continuously variable valve lift. The most well-known weakness is the Valvetronic eccentric shaft — when its bearings wear, rattling and clattering noises appear, and the repair is involved, sometimes requiring cylinder head removal. Timing chain and tensioner should be inspected beyond 150,000 km; a stretched chain makes itself known through rattling on cold starts. The crankcase ventilation system is a known wear item that can cause oil leaks and rough idle when it fails. VANOS solenoid valves become contaminated with extended oil change intervals. When buying used, listen for clean idle and ask about oil consumption — more than 0.5 litres per 1,000 km is a warning sign. Overall a reliable engine when the known wear items are kept in check.
- !! Timing chain stretched / chain tensioner defective from 110,000 km
The timing chain stretches prematurely due to a faulty chain tensioner. Plastic guide rails become brittle and break. Engine damage from chain jump is possible.
Symptoms: Rattling or clattering on cold start in the first few seconds, which improves or worsens as the engine warms up. - !! Valvetronic eccentric shaft / actuator motor defective from 150,000 km
The Valvetronic actuator motor or eccentric shaft fails at around 150,000 km. Fault code 2A67 is typical. The engine runs but without variable valve lift control — increased fuel consumption, limp mode.
Symptoms: Judder at 2,000 rpm; rough cold start; increased fuel consumption; engine stumbling when pulling away; fault code 2A67 - ! VANOS solenoid valve defective from 90,000 km
The VANOS solenoid valves wear and cause rpm fluctuations, power loss, and starting difficulties, especially at low revs.
Symptoms: Rpm fluctuations at idle, power loss at low revs, occasional starting difficulties.
+ 6 more engine weaknesses + vehicle weaknesses
Downsized direct-injection member of the N43 family with lean stratified charge — technically ambitious, problematic in practice. Timing chain is the biggest danger: stretching and guide rail breakage on many units from just 60,000 km — the most common and costly defect. Direct injection injectors foul or fail — misfires and rough running. NOx sensor fails regularly (stratified charge requires it for emissions control). High-pressure fuel pump can fail — sudden fuel pressure loss. VANOS solenoids get contaminated. Intake valves coke up as typical for direct injection without port washing.
- !! Timing chain stretches — guide rail breaks from 80,000 km
The N43B16 simplex chain stretches from around 60,000–130,000 km. Plastic guide rails crumble and block the oil pump. BMW goodwill was frequently refused despite the known design defect.
Symptoms: Rattling/clattering on cold start and around 2,000 rpm, engine warning light, in the worst case engine damage through oil pump blockage - !! Direct injection injectors fouled or defective from 130,000 km
Direct injection injectors become coked with frequent short-trip driving and fail from around 120,000–160,000 km. Black plastic housings must be replaced with the newer grey version.
Symptoms: Rough idle, misfire fault code P030x on an individual cylinder, increased fuel consumption, rough running - !! High-pressure pump fails — fuel pressure drop from 100,000 km
The N43 high-pressure pump fails intermittently and causes fuel pressure faults upstream of the fuel rail valve. Symptoms are most pronounced at idle in the 1,200–1,800 rpm range.
Symptoms: Judder and shaking at idle at traffic lights and junctions, fault code for fuel pressure upstream of the rail valve
+ 4 more engine weaknesses + vehicle weaknesses
The N46B20 is a two-litre four-cylinder with Valvetronic variable valve lift, producing between 129 and 150 hp as the successor to the M54B22. In daily use a pleasantly smooth and economical engine that eliminates the conventional throttle body through continuously variable valve lift. The most well-known weakness is the Valvetronic eccentric shaft — when its bearings wear, rattling and clattering noises appear, and the repair is involved, sometimes requiring cylinder head removal. Timing chain and tensioner should be inspected beyond 150,000 km; a stretched chain makes itself known through rattling on cold starts. The crankcase ventilation system is a known wear item that can cause oil leaks and rough idle when it fails. VANOS solenoid valves become contaminated with extended oil change intervals. When buying used, listen for clean idle and ask about oil consumption — more than 0.5 litres per 1,000 km is a warning sign. Overall a reliable engine when the known wear items are kept in check.
- !! Timing chain stretched / chain tensioner defective from 110,000 km
The timing chain stretches prematurely due to a faulty chain tensioner. Plastic guide rails become brittle and break. Engine damage from chain jump is possible.
Symptoms: Rattling or clattering on cold start in the first few seconds, which improves or worsens as the engine warms up. - !! Valvetronic eccentric shaft / actuator motor defective from 150,000 km
The Valvetronic actuator motor or eccentric shaft fails at around 150,000 km. Fault code 2A67 is typical. The engine runs but without variable valve lift control — increased fuel consumption, limp mode.
Symptoms: Judder at 2,000 rpm; rough cold start; increased fuel consumption; engine stumbling when pulling away; fault code 2A67 - ! VANOS solenoid valve defective from 90,000 km
The VANOS solenoid valves wear and cause rpm fluctuations, power loss, and starting difficulties, especially at low revs.
Symptoms: Rpm fluctuations at idle, power loss at low revs, occasional starting difficulties.
+ 6 more engine weaknesses + vehicle weaknesses
The N43B20 is a two-litre naturally aspirated engine with direct petrol injection and stratified charge operation, producing between 143 and 170 hp depending on the variant. Technically ambitious but in practice one of the most troublesome BMW petrol engines of its era. The high-pressure fuel pump is the Achilles heel — failure leaves the engine in limp mode or dead entirely. Injectors also wear faster than with conventional port injection and cost around 250 euros each to replace. The timing chain tends to stretch with inadequate oil maintenance, announcing itself through rattling on cold starts. The stratified charge system additionally requires a complex NOx storage catalyst that is sensitive to fuel quality. Lambda sensors and camshaft position sensors are among the frequently replaced wear items. This engine was only sold in European markets. When buying, listen for smooth idle — fluctuations often point to injector problems. Short oil change intervals under 12,000 km are essential.
- !! Timing chain stretched — critical issue from 80,000 km
The N43B20 has a known timing chain problem. The chain tensioner fails prematurely and plastic guide rails break. BMW published an improved tensioner in October 2016 (11318685091), but the underlying issue remains.
Symptoms: Rattling or clattering on cold start and during load changes. In advanced stages, engine damage through chain jump or breakage. - !! Piezo injectors wearing out — full set replacement required from 100,000 km
The stratified-charge piezo injectors wear from around 80,000–100,000 km. Failure requires complete replacement of all four injectors. Calibration values must be programmed into the control unit.
Symptoms: Hesitation and misfires especially after cold start; misfires in specific cylinders; rough idle; fuel smell; improvement once engine is warm - !! High-pressure pump defective from 150,000 km
The direct injection high-pressure pump fails and causes extended cold starts or hesitation under full load. Fault codes 2FBF, 2FBE, 29DC, 29E2 are typical.
Symptoms: Very long cold start (several seconds), hesitation under hard acceleration, fault memory entry for fuel pressure.
+ 5 more engine weaknesses + vehicle weaknesses
The N46B20 is a two-litre four-cylinder with Valvetronic variable valve lift, producing between 129 and 150 hp as the successor to the M54B22. In daily use a pleasantly smooth and economical engine that eliminates the conventional throttle body through continuously variable valve lift. The most well-known weakness is the Valvetronic eccentric shaft — when its bearings wear, rattling and clattering noises appear, and the repair is involved, sometimes requiring cylinder head removal. Timing chain and tensioner should be inspected beyond 150,000 km; a stretched chain makes itself known through rattling on cold starts. The crankcase ventilation system is a known wear item that can cause oil leaks and rough idle when it fails. VANOS solenoid valves become contaminated with extended oil change intervals. When buying used, listen for clean idle and ask about oil consumption — more than 0.5 litres per 1,000 km is a warning sign. Overall a reliable engine when the known wear items are kept in check.
- !! Timing chain stretched / chain tensioner defective from 110,000 km
The timing chain stretches prematurely due to a faulty chain tensioner. Plastic guide rails become brittle and break. Engine damage from chain jump is possible.
Symptoms: Rattling or clattering on cold start in the first few seconds, which improves or worsens as the engine warms up. - !! Valvetronic eccentric shaft / actuator motor defective from 150,000 km
The Valvetronic actuator motor or eccentric shaft fails at around 150,000 km. Fault code 2A67 is typical. The engine runs but without variable valve lift control — increased fuel consumption, limp mode.
Symptoms: Judder at 2,000 rpm; rough cold start; increased fuel consumption; engine stumbling when pulling away; fault code 2A67 - ! VANOS solenoid valve defective from 90,000 km
The VANOS solenoid valves wear and cause rpm fluctuations, power loss, and starting difficulties, especially at low revs.
Symptoms: Rpm fluctuations at idle, power loss at low revs, occasional starting difficulties.
+ 6 more engine weaknesses + vehicle weaknesses
The N43B20 is a two-litre naturally aspirated engine with direct petrol injection and stratified charge operation, producing between 143 and 170 hp depending on the variant. Technically ambitious but in practice one of the most troublesome BMW petrol engines of its era. The high-pressure fuel pump is the Achilles heel — failure leaves the engine in limp mode or dead entirely. Injectors also wear faster than with conventional port injection and cost around 250 euros each to replace. The timing chain tends to stretch with inadequate oil maintenance, announcing itself through rattling on cold starts. The stratified charge system additionally requires a complex NOx storage catalyst that is sensitive to fuel quality. Lambda sensors and camshaft position sensors are among the frequently replaced wear items. This engine was only sold in European markets. When buying, listen for smooth idle — fluctuations often point to injector problems. Short oil change intervals under 12,000 km are essential.
- !! Timing chain stretched — critical issue from 80,000 km
The N43B20 has a known timing chain problem. The chain tensioner fails prematurely and plastic guide rails break. BMW published an improved tensioner in October 2016 (11318685091), but the underlying issue remains.
Symptoms: Rattling or clattering on cold start and during load changes. In advanced stages, engine damage through chain jump or breakage. - !! Piezo injectors wearing out — full set replacement required from 100,000 km
The stratified-charge piezo injectors wear from around 80,000–100,000 km. Failure requires complete replacement of all four injectors. Calibration values must be programmed into the control unit.
Symptoms: Hesitation and misfires especially after cold start; misfires in specific cylinders; rough idle; fuel smell; improvement once engine is warm - !! High-pressure pump defective from 150,000 km
The direct injection high-pressure pump fails and causes extended cold starts or hesitation under full load. Fault codes 2FBF, 2FBE, 29DC, 29E2 are typical.
Symptoms: Very long cold start (several seconds), hesitation under hard acceleration, fault memory entry for fuel pressure.
+ 5 more engine weaknesses + vehicle weaknesses
The 258 hp top version of the N52 is one of the last large high-revving naturally aspirated engines from BMW: a magnesium-aluminium composite block that defines the class through extreme smoothness and a willingness to rev that drivers describe as 'like a sewing machine' — so even and effortless in its climb. Compared to the N54 turbo it sounds cleaner and more natural, without turbo hiss; instead a clear naturally aspirated note that fills out with increasing revs. Cold-start behaviour is impeccable; in daily use it runs nearly maintenance-free. Typical weaknesses: electric water pump (fails without warning, 80,000–150,000 km, preventive replacement recommended), Valvetronic eccentric shaft sensor (fault code, limp mode), VANOS solenoids with sludge build-up. Buying tip: check service history, as missed oil changes can permanently impair VANOS function.
- !! Electric water pump defective from 120,000 km
The N52 electric water pump is a known wear item. When it fails the engine overheats quickly. Recommended: preventive replacement when any abnormalities appear or from around 100,000 km.
Symptoms: Coolant temperature gauge rises quickly, coolant loss, audible pump malfunction, engine overheating. - !! Oil filter housing gasket — oil into coolant from 130,000 km
The gasket between the oil filter housing and the engine block ages and becomes porous, allowing oil into the coolant. Symptoms resemble a head gasket failure. Early replacement of both seals is recommended.
Symptoms: Oil film on the coolant; discoloured oil filler cap; coolant slightly foamy or brownish; no white exhaust smoke — a key differentiator from head gasket damage - !! Eccentric shaft sensor (Valvetronic) failure from 150,000 km
The Valvetronic eccentric shaft sensor fails due to moisture and ageing. Fault code 2A31 is typical. The sensor costs approximately €275; installation requires opening the cam cover.
Symptoms: Rough idle; severe judder with light throttle input; increased fuel consumption (up to +30%); fault code 2A31; engine runs better with the sensor disconnected
+ 6 more engine weaknesses + vehicle weaknesses
The 258 hp top version of the N52 is one of the last large high-revving naturally aspirated engines from BMW: a magnesium-aluminium composite block that defines the class through extreme smoothness and a willingness to rev that drivers describe as 'like a sewing machine' — so even and effortless in its climb. Compared to the N54 turbo it sounds cleaner and more natural, without turbo hiss; instead a clear naturally aspirated note that fills out with increasing revs. Cold-start behaviour is impeccable; in daily use it runs nearly maintenance-free. Typical weaknesses: electric water pump (fails without warning, 80,000–150,000 km, preventive replacement recommended), Valvetronic eccentric shaft sensor (fault code, limp mode), VANOS solenoids with sludge build-up. Buying tip: check service history, as missed oil changes can permanently impair VANOS function.
- !! Electric water pump defective from 120,000 km
The N52 electric water pump is a known wear item. When it fails the engine overheats quickly. Recommended: preventive replacement when any abnormalities appear or from around 100,000 km.
Symptoms: Coolant temperature gauge rises quickly, coolant loss, audible pump malfunction, engine overheating. - !! Oil filter housing gasket — oil into coolant from 130,000 km
The gasket between the oil filter housing and the engine block ages and becomes porous, allowing oil into the coolant. Symptoms resemble a head gasket failure. Early replacement of both seals is recommended.
Symptoms: Oil film on the coolant; discoloured oil filler cap; coolant slightly foamy or brownish; no white exhaust smoke — a key differentiator from head gasket damage - !! Eccentric shaft sensor (Valvetronic) failure from 150,000 km
The Valvetronic eccentric shaft sensor fails due to moisture and ageing. Fault code 2A31 is typical. The sensor costs approximately €275; installation requires opening the cam cover.
Symptoms: Rough idle; severe judder with light throttle input; increased fuel consumption (up to +30%); fault code 2A31; engine runs better with the sensor disconnected
+ 6 more engine weaknesses + vehicle weaknesses
The 258 hp top version of the N52 is one of the last large high-revving naturally aspirated engines from BMW: a magnesium-aluminium composite block that defines the class through extreme smoothness and a willingness to rev that drivers describe as 'like a sewing machine' — so even and effortless in its climb. Compared to the N54 turbo it sounds cleaner and more natural, without turbo hiss; instead a clear naturally aspirated note that fills out with increasing revs. Cold-start behaviour is impeccable; in daily use it runs nearly maintenance-free. Typical weaknesses: electric water pump (fails without warning, 80,000–150,000 km, preventive replacement recommended), Valvetronic eccentric shaft sensor (fault code, limp mode), VANOS solenoids with sludge build-up. Buying tip: check service history, as missed oil changes can permanently impair VANOS function.
- !! Electric water pump defective from 120,000 km
The N52 electric water pump is a known wear item. When it fails the engine overheats quickly. Recommended: preventive replacement when any abnormalities appear or from around 100,000 km.
Symptoms: Coolant temperature gauge rises quickly, coolant loss, audible pump malfunction, engine overheating. - !! Oil filter housing gasket — oil into coolant from 130,000 km
The gasket between the oil filter housing and the engine block ages and becomes porous, allowing oil into the coolant. Symptoms resemble a head gasket failure. Early replacement of both seals is recommended.
Symptoms: Oil film on the coolant; discoloured oil filler cap; coolant slightly foamy or brownish; no white exhaust smoke — a key differentiator from head gasket damage - !! Eccentric shaft sensor (Valvetronic) failure from 150,000 km
The Valvetronic eccentric shaft sensor fails due to moisture and ageing. Fault code 2A31 is typical. The sensor costs approximately €275; installation requires opening the cam cover.
Symptoms: Rough idle; severe judder with light throttle input; increased fuel consumption (up to +30%); fault code 2A31; engine runs better with the sensor disconnected
+ 6 more engine weaknesses + vehicle weaknesses
BMW's first production twin-turbo straight-six — two small Garrett turbos instead of a single large twin-scroll as on the N55 successor. At idle a quiet metallic whisper; from 3,000 rpm the twin-turbo thrust arrives with a characteristic whistle the N55 doesn't have. No Valvetronic — boost pressure instead of variable valve lift. The high-pressure pump (HPFP) is the N54 issue: if it fails while driving, the engine stops. BMW carried out several recalls but never fully resolved the problem. Piezo injectors must be brought to the latest revision. Wastegate rattle on cold start is cosmetic; turbo bearing damage from neglected oil supply is not. Oil changes every 7,500 km, never BMW Longlife. Let the engine idle for 30 seconds after hard use — the turbos will thank you. Tuning: Stage 1 via software brings 400+ hp; well-built examples with 600+ hp are documented. Those who maintain the N54 get the most exciting BMW six-cylinder of its generation.
- !! High-pressure fuel pump (HPFP) failure from 80,000 km
A notorious problem on the first BMW turbocharged straight-six. The high-pressure pump loses delivery pressure and the engine goes into limp mode. Build years 2006–2010 most affected; several revisions made.
Symptoms: Hesitation, power loss, engine warning, engine stalls, extended cranking - !! Injector failure (index < 10) from 90,000 km
Piezo injectors from early revisions (index 1–9) are prone to failure. Misfires, rough running. Complete set per bank must be replaced.
Symptoms: Misfires, rough running, engine warning, elevated emissions - !! Turbocharger bearing failure from 150,000 km
Both turbochargers can suffer bearing damage from insufficient oil supply, blocked return lines, or hot shutdown after full-load driving. Metal swarf in the oil, risk of engine damage.
Symptoms: Blue smoke from the exhaust, oil in the intercooler and intake tract, whistling noise under load, significant power loss
+ 9 more engine weaknesses + vehicle weaknesses
Single twin-scroll turbo instead of the N54's twin-turbo — torque comes in evenly from 1,200 rpm and doesn't let up to 5,500. At idle a deep, barely audible hum; under load a rich rumble that surpasses the N54 in refinement but lacks its rawness. Above 5,000 rpm the turbo drowns out the engine — those seeking naturally-aspirated emotion will be disappointed. Valvetronic almost completely eliminates the throttle butterfly; throttle response is therefore more direct than on most turbo engines. The electric water pump is the Achilles heel: fails between 80,000 and 120,000 km without warning. Valve cover gasket starts leaking from 100,000 km — replace the entire cover, not just the gasket. Oil changes every 10,000 km instead of BMW Longlife, 5W-30 LL-04. Tuning: Stage 1 brings 350+ hp; from Stage 2 the HPFP becomes the bottleneck — fit the B58 pump. Considered one of the most reliable M-engines of the last 20 years when maintained properly.
- !! Bearing wear from neglected maintenance from 120,000 km
Connecting rod bearings wear with extended oil change intervals or oil starvation. Particularly affects vehicles on Longlife intervals driven hard.
Symptoms: Knocking from the engine block, oil pressure warning, metallic particles in the oil - !! Electric water pump failure from 130,000 km
The N55 electric water pump typically fails between 100,000 and 150,000 km. A sudden failure while driving can cause overheating damage to the cylinder head or gasket within minutes.
Symptoms: Overheating warning; cooling fan runs continuously or intermittently; slow warm-up; coolant loss at idle - !! Valvetronic eccentric shaft wear from 150,000 km
Oil jet for eccentric shaft lubrication clogs with poor oil maintenance. Shaft wears excessively — loud ticking and Valvetronic system failure.
Symptoms: Ticking noise from engine bay, rough idle, misfires, power loss, extended cranking on start
+ 10 more engine weaknesses + vehicle weaknesses
BMW's first production twin-turbo straight-six — two small Garrett turbos instead of a single large twin-scroll as on the N55 successor. At idle a quiet metallic whisper; from 3,000 rpm the twin-turbo thrust arrives with a characteristic whistle the N55 doesn't have. No Valvetronic — boost pressure instead of variable valve lift. The high-pressure pump (HPFP) is the N54 issue: if it fails while driving, the engine stops. BMW carried out several recalls but never fully resolved the problem. Piezo injectors must be brought to the latest revision. Wastegate rattle on cold start is cosmetic; turbo bearing damage from neglected oil supply is not. Oil changes every 7,500 km, never BMW Longlife. Let the engine idle for 30 seconds after hard use — the turbos will thank you. Tuning: Stage 1 via software brings 400+ hp; well-built examples with 600+ hp are documented. Those who maintain the N54 get the most exciting BMW six-cylinder of its generation.
- !! High-pressure fuel pump (HPFP) failure from 80,000 km
A notorious problem on the first BMW turbocharged straight-six. The high-pressure pump loses delivery pressure and the engine goes into limp mode. Build years 2006–2010 most affected; several revisions made.
Symptoms: Hesitation, power loss, engine warning, engine stalls, extended cranking - !! Injector failure (index < 10) from 90,000 km
Piezo injectors from early revisions (index 1–9) are prone to failure. Misfires, rough running. Complete set per bank must be replaced.
Symptoms: Misfires, rough running, engine warning, elevated emissions - !! Turbocharger bearing failure from 150,000 km
Both turbochargers can suffer bearing damage from insufficient oil supply, blocked return lines, or hot shutdown after full-load driving. Metal swarf in the oil, risk of engine damage.
Symptoms: Blue smoke from the exhaust, oil in the intercooler and intake tract, whistling noise under load, significant power loss
+ 9 more engine weaknesses + vehicle weaknesses
Vehicle Weaknesses
| Weakness | Cost | |
|---|---|---|
| Suspension springs break Broken suspension springs and rusty spring perches are frequently flagged on the E87 per TÜV reports. Worn track rod ends are also a known defect. Affects both front and rear axle. Symptoms: Car leans to one side, cracking noises over bumps, crooked stance, uneven tyre wear. from 100,000 km | Medium | |
| Rear control arm rubber bushings worn Rubber bushings on the rear control arms lose their elasticity. Camber change and MOT failure possible. Replace both sides simultaneously. Symptoms: Clunking or thumping over bumps; uneven tyre wear; car pulls under braking; handling deteriorates. from 100,000 km | Low | |
| Front shock absorbers and top mounts worn Front shock absorbers and top mounts wear out typically from 120,000–150,000 km. The original Bilstein dampers are known for early wear; noises can appear from as low as 45,000 km. Symptoms: Clicking or thudding from the front, especially over cobblestones or when cornering. Vague steering, unsettled ride. from 140,000 km | Medium | |
| Rear control arms and bushings worn Rear control arms and bushings wear from around 120,000–150,000 km. Rear axle geometry changes, tyre wear increases. Symptoms: Uneven tyre wear at the rear, slight pull to one side, thumping over bumps from the rear. from 140,000 km | Medium | |
| Rear wheel bearing worn Rear wheel bearings wear from around 120,000 km with a characteristic droning noise. Symptom switches sides depending on cornering direction. Replacement requires specialist work and special tools. Symptoms: Dull droning or humming while driving; noise changes when turning. Droning from the right side gets louder in left corners — classic bearing noise. from 120,000 km | Low |
Test Reports
TÜV Report 2014
The 1 Series E87 is one of the more reliable compact cars of its era and passes early MOTs mostly without issues.
2013-11ADAC Breakdown Statistics 2013
The E87 ranks at the top of its registration class for breakdown frequency.
2013-04Alternatives
Explore more
Known Problems and Issues +
A total of 134 weaknesses have been documented for the BMW 1er E87 (2004–2013) — 112 engine-related and 22 vehicle-related. 4 problem engines: N43B20 (2.0L DI), N20B20 (2.0L Turbo), N47D20 (2.0L Diesel), N43B16 (1.6L DI). Typical issues affect Suspension, Brakes, Electronics, Rust.
1er (M47TUD20, 2004–2007) — Be Careful: Timing chain stretches, Swirl flaps break off and fall into the engine, Cylinder head cracks (M47TU variant). Power: 163 PS.
1er (N47D20, 2007–2011) — Stay Away!: Timing chain breaks — known serial defect, Water pump defective — overheating risk, High-pressure pump failure — metal swarf in the system. Power: 136–150 PS.
1er (N47D20, 2007–2011) — Stay Away!: Timing chain breaks — known serial defect, Water pump defective — overheating risk, High-pressure pump failure — metal swarf in the system. Power: 177–184 PS.
1er (N47D20, 2007–2011) — Stay Away!: Timing chain breaks — known serial defect, Water pump defective — overheating risk, High-pressure pump failure — metal swarf in the system. Power: 197–204 PS.
1er (N47D20, 2007–2011) — Stay Away!: Timing chain breaks — known serial defect, Water pump defective — overheating risk, High-pressure pump failure — metal swarf in the system. Power: 136–143 PS.
1er (N47D20, 2007–2013) — Stay Away!: Timing chain breaks — known serial defect, Water pump defective — overheating risk, High-pressure pump failure — metal swarf in the system. Power: 143 PS.
1er (N47D20, 2007–2013) — Stay Away!: Timing chain breaks — known serial defect, Water pump defective — overheating risk, High-pressure pump failure — metal swarf in the system. Power: 177 PS.
1er (N47D20, 2007–2013) — Stay Away!: Timing chain breaks — known serial defect, Water pump defective — overheating risk, High-pressure pump failure — metal swarf in the system. Power: 204 PS.
1er (N47D20, 2008–2013) — Stay Away!: Timing chain breaks — known serial defect, Water pump defective — overheating risk, High-pressure pump failure — metal swarf in the system. Power: 197 PS.
1er (N47D20, 2009–2011) — Stay Away!: Timing chain breaks — known serial defect, Water pump defective — overheating risk, High-pressure pump failure — metal swarf in the system. Power: 116–121 PS.
1er (N47D20, 2009–2011) — Stay Away!: Timing chain breaks — known serial defect, Water pump defective — overheating risk, High-pressure pump failure — metal swarf in the system. Power: 90 PS.
1er (N47D20, 2011–2015) — Stay Away!: Timing chain breaks — known serial defect, Water pump defective — overheating risk, High-pressure pump failure — metal swarf in the system. Power: 177–190 PS.
1er (N47D20, 2012–2015) — Stay Away!: Timing chain breaks — known serial defect, Water pump defective — overheating risk, High-pressure pump failure — metal swarf in the system. Power: 211–224 PS.
1er (B47D20, 2012–2015) — Be Careful: Timing chain elongation on early models (2014–2016), EGR cooler leak with fire risk (recall), Turbo cascade failure. Power: 116 PS.
1er (N47D16, 2012–2015) — Be Careful: Timing chain wear, Timing chain guide rails break (N47 issue), EGR cooler fire risk (recall KBA 008124). Power: 95 PS.
1er (N45B16, 2004–2007) — Be Careful: Timing chain stretched / chain tensioner defective, Timing chain guide and tensioner worn, VANOS rattle on cold start. Power: 116–122 PS.
1er (N46B20, 2004–2007) — Be Careful: Timing chain stretched / chain tensioner defective, Valvetronic eccentric shaft / actuator motor defective, VANOS solenoid valve defective. Power: 129–136 PS.
1er (N46B20, 2004–2007) — Be Careful: Timing chain stretched / chain tensioner defective, Valvetronic eccentric shaft / actuator motor defective, VANOS solenoid valve defective. Power: 143–156 PS.
1er (N46B20, 2004–2011) — Be Careful: Timing chain stretched / chain tensioner defective, Valvetronic eccentric shaft / actuator motor defective, VANOS solenoid valve defective. Power: 129–143 PS.
1er (N46B20, 2004–2011) — Be Careful: Timing chain stretched / chain tensioner defective, Valvetronic eccentric shaft / actuator motor defective, VANOS solenoid valve defective. Power: 121–129 PS.
1er (N46B20, 2004–2011) — Be Careful: Timing chain stretched / chain tensioner defective, Valvetronic eccentric shaft / actuator motor defective, VANOS solenoid valve defective. Power: 121–122 PS.
1er (N52B30, 2005–2011) — Be Careful: Electric water pump defective, Oil filter housing gasket — oil into coolant, Eccentric shaft sensor (Valvetronic) failure. Power: 258–272 PS.
1er (N43B20, 2007–2011) — Stay Away!: Timing chain stretched — critical issue, Piezo injectors wearing out — full set replacement required, High-pressure pump defective. Power: 136–150 PS.
1er (N43B20, 2007–2011) — Stay Away!: Timing chain stretched — critical issue, Piezo injectors wearing out — full set replacement required, High-pressure pump defective. Power: 163–170 PS.
1er (N43B20, 2007–2011) — Stay Away!: Timing chain stretched — critical issue, Piezo injectors wearing out — full set replacement required, High-pressure pump defective. Power: 156–170 PS.
1er (N43B20, 2007–2011) — Stay Away!: Timing chain stretched — critical issue, Piezo injectors wearing out — full set replacement required, High-pressure pump defective. Power: 170 PS.
1er (N43B16, 2007–2011) — Stay Away!: Timing chain stretches — guide rail breaks, Direct injection injectors fouled or defective, High-pressure pump fails — fuel pressure drop. Power: 116–122 PS.
1er (N43B20, 2008–2013) — Stay Away!: Timing chain stretched — critical issue, Piezo injectors wearing out — full set replacement required, High-pressure pump defective. Power: 143 PS.
1er (N43B20, 2008–2013) — Stay Away!: Timing chain stretched — critical issue, Piezo injectors wearing out — full set replacement required, High-pressure pump defective. Power: 163 PS.
1er (N52B30, 2008–2011) — Be Careful: Electric water pump defective, Oil filter housing gasket — oil into coolant, Eccentric shaft sensor (Valvetronic) failure. Power: 218 PS.
1er (N52B30, 2008–2013) — Be Careful: Electric water pump defective, Oil filter housing gasket — oil into coolant, Eccentric shaft sensor (Valvetronic) failure. Power: 231 PS.
1er (N54B30, 2008–2010) — Be Careful: High-pressure fuel pump (HPFP) failure, Injector failure (index < 10), Turbocharger bearing failure. Power: 306 PS.
1er (N55B30, 2010–2013) — Be Careful: Bearing wear from neglected maintenance, Electric water pump failure, Valvetronic eccentric shaft wear. Power: 306 PS.
1er (N13B16, 2011–2015) — Be Careful: Timing chain stretch, Turbo oil supply line — O-rings defective, Piston rings and valve stem seals worn. Power: 136 PS.
1er (N13B16, 2011–2015) — Be Careful: Timing chain stretch, Turbo oil supply line — O-rings defective, Piston rings and valve stem seals worn. Power: 170–177 PS.
1er (N54B30, 2011–2012) — Be Careful: High-pressure fuel pump (HPFP) failure, Injector failure (index < 10), Turbocharger bearing failure. Power: 340 PS.
1er (N13B16, 2012–2015) — Be Careful: Timing chain stretch, Turbo oil supply line — O-rings defective, Piston rings and valve stem seals worn. Power: 102 PS.
1er (N20B20, 2012–2016) — Stay Away!: Timing chain and oil pump chain, Electric water pump failure, Oil pump chain / oil pump sprocket defective. Power: 238 PS.
1er (N55B30, 2012–2016) — Be Careful: Bearing wear from neglected maintenance, Electric water pump failure, Valvetronic eccentric shaft wear. Power: 326 PS.
What to watch out for with the BMW 1er? See the detailed listing of all engine and vehicle weaknesses in the sections above.
Frequently Asked Questions
What problems and weaknesses does the BMW 1er E87 have? +
What should I look for when buying a used BMW 1er E87? +
Which engine is recommended? +
Which BMW 1er E87 engine is the most fun? +
Is the BMW 1er E87 worth buying used? +
What horsepower variants are available for the BMW 1er E87? +
Last updated: February 2026 · All information without guarantee