BMW X5 M
BMW's first turbo V8 in the M5 — the crossflow exhaust routing between the cylinder banks (hot-V) produces an atypical V8 sound: less primitive burble than the S62 naturally aspirated, more muted growl with turbo whistle in the background. What the S63 loses in character it gains in torque — 680 Nm available from 1,500 rpm, pushing consistently to above 5,000 rpm. The Achilles heel is the con rod bearings: metal swarf in the oil filter on an oil change is the earliest warning sign. Preventive bearing replacement every 80,000–100,000 km is strongly recommended, costing €4,000–6,000. Oil cooler seals weep from 60,000 km; turbocharger oil supply lines coke up with Longlife intervals. Shorten oil changes to 8,000 km and have the bearings done and the result is a robust engine.
First M SUV — 555 hp in 2.3 tonnes
555 hp V8 in the X5 — absurdly fast in a straight line, in tight corners you feel every one of the 2,380 kg. V8 sound raw and direct, brakes at their limit quickly under sporting use. Not a corner-carving machine, but on the motorway a completely different calibre to any diesel X5.
Engine Weaknesses 6
Connecting rod bearing shells wear through high revs and turbo boost pressure. Metal particles in the oil filter are the earliest warning sign. Preventive replacement every 80,000–100,000 km for around €2,390 is recommended — compared to €30,000–€50,000 for a replacement engine.
Symptoms: Knocking or hammering engine noises under load and at idle, metal particles in the oil filter or sump, oil pressure warning light, engine no longer revs freely
Manufacturing tolerance fault on the oil pump drive shaft. The shaft can separate from the rotor, causing immediate total oil pressure loss. Affects approximately 696 US vehicles, produced July–September 2012. NHTSA Recall 12V475000.
The rubber lines and plastic T-connectors of the turbo cooling circuit become brittle through permanent radiant heat in the V-valley. Typically first seen from around 100,000 km. A repair kit with silicone hoses and brass T-pieces is the permanent solution.
Symptoms: Dropping coolant level without visible external leak, gurgling after switching off the engine, rising engine temperature, coolant steam from engine bay
Leaking direct injectors allow fuel to drain into the combustion chamber, which passes the piston rings into the oil. Fuel dilution reduces lubrication capacity and considerably accelerates connecting rod bearing wear.
Symptoms: Elevated oil level on the dipstick (fuel smell in oil), increased fuel consumption, cold-start difficulty, measurable fuel dilution in oil analysis report
Valve stem seals harden through extreme radiant heat from the V-valley turbos. Typically appears around 97,000–120,000 km. Repair costs €2,500–€6,000 (UK workshops £3,540–£4,140 with genuine parts).
Symptoms: Blue smoke cloud from exhaust on first acceleration after an idle period, increased oil consumption above 0.5 L/1,000 km, sooty spark plugs
VANOS solenoids build up oil deposits and fail with fault codes. The S63 has four solenoids; VANOS gears can also require replacement. Typically from 80,000–160,000 km.
Symptoms: Engine fault message (camshaft phaser error), limp mode activation, rough running particularly at certain rev ranges, occasional cold-start difficulty
Vehicle Weaknesses 14
Air suspension compressor and air springs fail frequently from 80,000 km. Average lifespan of air springs is 100,000–120,000 km. Aftermarket springs (Arnott/Continental) cost around €115 each — BMW pricing is significantly higher.
On cars with a panoramic roof, blocked drainage channels can allow water into the boot, where sensitive control units sit beneath the load floor trim. Consequential costs are considerable.
The xDrive transfer case ATC700 wears prematurely with mismatched tyre rolling circumferences or neglected oil changes. Juddering on pull-away is the typical early symptom. Replacement can cost up to €5,000.
The timing chain in the S63 engine of the X5 M E70 can elongate and rattle on cold start. Ignoring it leads to chain breakage and catastrophic engine failure. Neglected oil changes accelerate wear of the plastic guide rails.
Knocking noises from the S63 V8 at idle and while driving can indicate worn con rod or main bearings. Damage is caused by oil starvation or delayed oil changes. Engine rebuild or replacement unit required.
The S63 hot-V layout generates extreme thermal stress. Rubber connectors and plastic T-pieces in the tight valley between the cylinder banks split. Coolant loss leads to overheating.
From around 150,000 km the rear air springs become porous; the compressor runs continuously and overheats. Both sides should be replaced simultaneously as the second bellows typically follows shortly after.
Electronically controlled Adaptive Drive dampers fail from 120,000 km; replacement is only possible with BMW parts and costs around €800 per damper. Standard suspension is far more trouble-free.
The high vehicle weight of the X5 M places disproportionate stress on axle suspension components. TÜV regularly flags suspension components. Springs and dampers deteriorate early.
The optional air suspension on the E70 frequently fails from 80,000 km. Air springs and compressor wear disproportionately on the heavy X5 M.
A creaking, sometimes leaking panoramic roof is a well-known TÜV defect on the E70. Recommendation: choose a car without a panoramic roof. A new roof centre unit costs around €330 without fitting.
iDrive system shows frequent faults after 100,000 km. The ignition switch can prevent the car from starting. The electric water pump on the N55 is prone to wear.
Up to model year 2010, BMW used cheaper sealing compound rather than proper gaskets for the tail lights, causing moisture ingress and short circuits in the rear lights.
The high vehicle weight of the X5 M combined with engine power causes elevated brake wear. Discs and pads need replacing more frequently than on the standard X5.