KNOWN FAULTS · BMW

BMW Serie 6 (E63/E64) M6 (S85, 5.0 V10) common problems.

2003–2010 · Petrol

Sources are not verified in real time and no entry confirms that your car is affected.

2 known faults with sources

BMW M rod bearings (S54, S65, S85)Engine (rod bearings)

Engine / equipment: S54 (M3 E46, Z4 M), S65 V8 (M3 E90/E92/E93) and S85 V10 (M5 E60, M6 E63)
Period mentioned: 2000–2013
Symptoms: Little prior warning; once wear is advanced, a metallic rod knock that rises with revs. On the S65 and S85, also jerking and limp mode from failing throttle actuators.
Possible cause described: Very tight rod bearing clearances and soft bearing material, made worse by cold oil, revving the engine before it is warm and poor maintenance. Catastrophic failure is rare, but premature wear is common.
Check for the garage: Oil analysis and bearing replacement history. Indicative preventive replacement: S54 around 130,000–160,000 km, S65 around 100,000–130,000 km and S85 around 80,000–110,000 km.
Cost cited in the source: Preventive replacement: approx. €2,800–5,500 (converted from dollars); a spun bearing costs far moreA rough figure from the original database, not an up-to-date quote.

Mileage cited in the database: 80,000–160,000 km. This is not a maintenance interval and does not predict a failure.

Applies if: Only if fitted with the automatic gearbox described in the record.

ZF 6HP mechatronic sleeve leak and harsh shiftsAutomatic gearbox

Engine / equipment: ZF 6-speed automatic 6HP19/21/26/28 (E53, E60/E61, E63/E64, E65/E66, E85, E90–E93)
Period mentioned: Approx. 2001–2013
Symptoms: Oil drips or dampness by the electrical connector on the side of the pan, a bump on the downshift just before stopping, harsh or flared shifts (especially 3rd-4th and 4th-5th under throttle) and a limp mode that clears after restarting.
Possible cause described: The sealing sleeve between the mechatronic unit and the wiring harness has O-rings that harden and let oil out. A BMW bulletin says to replace it only for a real leak, not mere dampness, and warns that fitting it wrongly damages the connector pins and forces a mechatronic replacement. With low fluid the gearbox loses pressure. Harsh shifts can also come from worn solenoids or valve body, not only the sleeve.
Check for the garage: At a garage: read the gearbox codes, check the fluid level with the official procedure (correct temperature and engine running) and look for a real leak at the sleeve and pan gasket. After a fluid or parts change, the garage should reset adaptations. If limp mode persists, check solenoids and valve body before replacing the gearbox.
Cost cited in the source: Sleeve and pan gasket: minor repair. If fluid is lost and the gearbox is damaged, in a US forum case BMW offered a remanufactured gearbox for about $2,800 without fitting.A rough figure from the original database, not an up-to-date quote.