Excessive soot and carbon build up in the intake manifold and intake valves of the 335D which is a diesel car. This causes rough idling, misfires, and loss of engine power. While merging onto a highway, the engine malfunctioned due to this problem and immediately lost power almost causing a collision. The vehicle has had this problem for more than 20K miles and continuous trips to the dealer to diagnose. Finally, the dealer agreed it was carbon build up but that it is not covered. The repairs for this should be covered by BMW as it is emissions related and can cause significant engine problems. This has not been an issue on other diesel cars by other manufacturers.

- Chicago, IL, USA

Driver side floor mat curled up at front and was captured by clutch pedal when changing gear. When clutch was again engaged, mat was pulled up and interfered with subsequent brake operation before freeing itself and falling back onto floor well. Since problem was intermittent, it took a while to figure out.

- Wallingford, CT, USA

The contact owns a 2010 BMW 335I. The contact stated that the vehicle hesitated to accelerate from stops. The contact also stated that the vehicle experienced a failure in which power would not be transmitted to the rear wheels. The engine continued to run, but the rear wheels would not receive power from the transmission. The vehicle was taken to an authorized dealer but received no assistance. The dealer did not believe that the contact had encountered the failures as described. The dealer was unable to diagnose the failure and stated that it was impossible for their diagnostic system to not detect the failures. The manufacturer was notified and offered no assistance. The manufacturer also stated that they were closing their case and would no longer communicate with the contact about the situation. The vehicle was not repaired. The approximate failure mileage was 35,000.

- Powell, TN, USA