Three problems related to engine belts and pulleys have been reported for the 2008 BMW 335. The most recently reported issues are listed below.
The vehicle started making a loud knocking sound while driving on the highway at approximately 65 mph. (video was taken) the oil pressure dropped, a battery indicator light flashed, the power steering went out, and the vehicle lost speed. I almost wreaked. I checked my steering wheel fluid and it was brown, an indication to me the power steering pump went out. A belt also snapped. I purchased an extended warranty that BMW is telling me does not cover the a/c compressor. I am being told that in order for BMW of fresno to make a proper assessment of the steering issue I first have to replace the a/c compressor at $2535. 34. As a fleet manager, I know my chain is being yanked.
I just got belt replaced. About two weeks later the belt pops. The car lost power steering and then would not start. I've researched online n saw that its a design flaw in the 07- 08 335i's but BMW is refusing a recall. Imagine if I was on the highway n it happened. Its terrible.
Adaptive head light system failure while driving down the interstate. This is the third time the unit had been replaced within 4 years and under 65k miles. Every time this was a non aggravated issue and not covered by the dealer. Furthermore, while driving the car around a corner at a moderate rate of speed I noticed the car making an abnormal noise. Upon pulling over and inspecting further, it was found to be a shredded belt which had thrown itself everywhere inside the engine bay. Once it was towed to be repaired, it was discovered that the power steering pulley contacted the front bar and, breaking the pulley in half, causing it to have sharp edges which directly cut the belt in half and resulted in the belt being wrapped around the pulley and various engine components. There is not enough clearance as a result of a factory/manufacturer defect and now I am out on the bill.