KNOWN FAULTS · BMW

BMW X3 (E83) 3.0d / 35d (M57) common problems.

2004–2010 · Diesel

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

2 known faults with sources

Applies if: Only if the intake manifold has swirl flaps; some versions do not. Confirm at a garage.

Intake swirl flaps (M57)Intake

Engine / equipment: M57 3.0 six-cylinder diesel with swirl flaps (330d E46/E90, 525d/530d/535d E39/E60, 635d, 730d E65, X3 3.0d, X5 3.0d E53/E70, X6 30d/35d)
Period mentioned: 1998–2010
Symptoms: Usually none until it fails. A common early warning: oil seeping around the flap spindles on top of the engine. If a flap or its screw comes loose and enters a cylinder: sudden heavy knocking, loss of power, smoke and possible turbo damage as well.
Possible cause described: The metal flaps in the intake manifold collect soot and oil and their spindles wear over the years. The flap, its screw or part of the spindle can come loose and drop into the cylinder, damaging valves, piston and head. An owners' forum quotes BMW as having strengthened the spindles on later manifolds (from 4 to 4.5 mm), but other owners doubt the change removes the risk.
Check for the garage: At a garage: confirm whether the manifold has swirl flaps (some versions do not), look for oil around the spindles and play in the flaps, and check the history for earlier replacement or removal. With any new metallic knocking, stop the engine and do not restart it.
Cost cited in the source: Preventive inspection: workshop labour. If a flap enters the engine, a buyer's report quotes repair costs above €4,000.A rough figure from the original database, not an up-to-date quote.

xDrive transfer case actuator motorTransmission

Engine / equipment: ATC 400/500 transfer case with actuator motor (X3 E83, X5 E53 from 2004, X5 E70, X6 E71/E72)
Period mentioned: 2004–2014
Symptoms: The 4x4, ABS and brake warning lights come on together while driving (often intermittently), a click or clunk under the car when switching the ignition off or on, and jerky acceleration in low gears.
Possible cause described: The plastic gear in the motor that drives the transfer case clutch wears out, and the system disables all-wheel drive, ABS and stability control to protect itself. A parts manufacturer names an excessive difference in tread depth between front and rear tyres as a common cause of the wear.
Check for the garage: Scan every module with a diagnostic tool (transfer case codes) and measure the tread depth on all four tyres. The ABS and brake lights can have other causes, such as a wheel sensor or the ABS module: confirm before replacing parts. With the brake light on, also check the fluid and do not drive if the pedal feels abnormal.
Cost cited in the source: Complete actuator motor: about $350 in a US forum case; a cheaper reinforced gear is also sold on its own. Tyres extra if wear differs between axles.A rough figure from the original database, not an up-to-date quote.