BMW 6er E63
Weaknesses, engine ratings and buying advice
367 PS
650i · Benzin
V8 Coupe, No Eco Compromises
Legendary!355–367 PS
4.8L V8 Benzin
9 weaknesses
Stay Away!Body Variants
The BMW 6er E63 is available as Coupé and Convertible — choose your body type for specific insurance data:
Generations
Engine Overview
The BMW 6er E63 is available with 3 engine variants — from 204 to 367 hp.
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 100,000 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 120,000 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 100,000 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
+ 2 more engine weaknesses + vehicle weaknesses
Same construction as the N62B48 with 4.4 litres and 333 hp — the workhorse of the N62 range. The Valvetronic eccentric shaft and intermediate levers carry the same wear pattern: from 150,000 km the intermediate levers machine into the bearing surface, misfires and Valvetronic limp mode follow. At idle a deep, dry V8 note; at revs increasingly silky overtones. Well maintained with short oil intervals a long-lived engine. Cooling system and valve stem seals follow the same rules as the big brother. A clean example with documented workshop history is money well spent.
- !! Valve stem seals harden — blue smoke after standing from 130,000 km
Rubber seals harden from ~130,000 km; oil passes the valve stems into the combustion chamber. Classic finding: blue smoke on cold start after standing. Special tool allows replacement without removing the camshafts.
Symptoms: Blue-white smoke from the exhaust on cold start and after idle periods. Increased oil consumption (0.5–1 L/1,000 km). No smoke when warm under load. - !! Coolant transfer pipe leaking — hidden coolant loss from 120,000 km
Aluminium pipe between the cylinder heads in the V seals with O-rings. These harden over time and coolant disappears without visible external leakage. Repair requires removal of the intake manifold.
Symptoms: Gradual coolant level drop without visible leakage. Sweet smell in the engine bay. Coolant warning light. In advanced stages risk of overheating. - !! Water pump — plastic impeller breaks from 150,000 km
The original plastic impeller can break at high mileage and spin freely — engine overheats without warning. Preventive replacement at 150,000 km with a metal impeller is recommended.
Symptoms: Engine temperature rises sharply and suddenly. Slight ticking at idle that disappears when driving. Coolant warning light. In extreme cases overheating damage.
+ 6 more engine weaknesses + vehicle weaknesses
Bavaria's first V8 with fully variable valve train: Valvetronic handles load control almost without the throttle butterfly, giving the N62B48 an unusually smooth throttle response. Cold, it unmistakably sounds like a V8 — deep, cultured rumble at idle; at 4,000 rpm the note shifts to a silky high-frequency range. Aluminium block with magnesium bedplate, light and torsionally stiff. The construction is complex: valve stem seals harden from 130,000 km; blue smoke after standing is the first sign. The coolant transfer pipe between the cylinder heads — an aluminium pipe with O-ring deep in the V — develops leaks without anything visible from outside. Budget generously for maintenance.
- !! Valve stem seals harden — blue smoke after standing from 130,000 km
Rubber seals harden from ~130,000 km; oil passes the valve stems into the combustion chamber. Classic finding: blue smoke on cold start after standing. Special tool allows replacement without removing the camshafts.
Symptoms: Blue-white smoke from the exhaust on cold start and after idle periods. Increased oil consumption (0.5–1 L/1,000 km). No smoke when warm under load. - !! Coolant transfer pipe leaking — hidden coolant loss from 120,000 km
Aluminium pipe between the cylinder heads in the V seals with O-rings. These harden over time and coolant disappears without visible external leakage. Repair requires removal of the intake manifold.
Symptoms: Gradual coolant level drop without visible leakage. Sweet smell in the engine bay. Coolant warning light. In advanced stages risk of overheating. - !! Water pump — plastic impeller breaks from 150,000 km
The original plastic impeller can break at high mileage and spin freely — engine overheats without warning. Preventive replacement at 150,000 km with a metal impeller is recommended.
Symptoms: Engine temperature rises sharply and suddenly. Slight ticking at idle that disappears when driving. Coolant warning light. In extreme cases overheating damage.
+ 6 more engine weaknesses + vehicle weaknesses
Vehicle Weaknesses
| Weakness | Cost | |
|---|---|---|
| Roof hydraulics: pump and cylinders leak The hydraulic pump and cylinders of the soft-top mechanism commonly leak from around 100,000 km. Pressure loss means the roof only moves jerkily or gets stuck. The purple relays on the hydraulic module also fail and are only available from BMW as an assembly (1,400 €). Symptoms: Roof doesn't open fully or stops halfway, jerky movements, hydraulic oil smell in boot from 110,000 km | Medium | |
| Convertible roof doesn't close fully The E64 convertible roof sporadically won't close fully — it stops about 30 cm before the windscreen. Cause is a faulty rotation angle sensor on the main post, left side. Cheaper to repair than the roof itself. Symptoms: Roof won't close to windscreen, stops halfway, roof fault message, manual assistance needed to close. from 80,000 km | Medium | |
| Water ingress in hood compartment and boot Water enters the boot through blocked drain channels and faulty vent flaps under the rear bumper. In 95% of cases the left/right vent flaps under the bumper are the cause. Wet carpets and damage to electronics under the boot floor result. Symptoms: Damp boot, wet carpets, water smell in cabin, standing water in spare wheel well from 80,000 km | Medium |
Test Reports
TÜV Report 2014
The 6 Series Coupé E63 scores average at MOT — the powerful V8 engines bring specific wear patterns.
2013-11ADAC Breakdown Statistics 2010
The 6 Series E63 sits mid-table for breakdowns — the complexity of the V8 engine and electronics shows in the figures.
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Known Problems and Issues +
A total of 34 weaknesses have been documented for the BMW 6er E63 (2003–2010) — 23 engine-related and 11 vehicle-related. 2 problem engines: N62B48 (4.8L V8), N62B44 (4.4L V8). Typical issues affect Body, Electronics, Steering, Suspension.
6er (N62B44, 2003–2010) — Stay Away!: Valve stem seals harden — blue smoke after standing, Coolant transfer pipe leaking — hidden coolant loss, Water pump — plastic impeller breaks. Power: 333 PS.
6er (N62B48, 2005–2010) — Stay Away!: Valve stem seals harden — blue smoke after standing, Coolant transfer pipe leaking — hidden coolant loss, Water pump — plastic impeller breaks. Power: 367 PS.
6er (N52B30, 2007–2010) — Be Careful: Electric water pump defective, Oil filter housing gasket — oil into coolant, Eccentric shaft sensor (Valvetronic) failure. Power: 258 PS.
What to watch out for with the BMW 6er? See the detailed listing of all engine and vehicle weaknesses in the sections above.
Frequently Asked Questions
What problems and weaknesses does the BMW 6er E63 have? +
What should I look for when buying a used BMW 6er E63? +
Which engine is recommended? +
Which BMW 6er E63 engine is the most fun? +
Is the BMW 6er E63 worth buying used? +
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Last updated: February 2026 · All information without guarantee