One problem related to fuel injection has been reported for the 2008 BMW 335. The most recently reported issues are listed below.
My BMW 335i only had a few thousand miles when I began noticing it took an inordinate amount of time to start the engine. It would crank for several seconds before the engine finally started, especially if it was a cold start. Once the engine was warmed up it seemed to run just fine. Then after a few days the "service engine" light and exclamation point were light up on my dashboard. I took it to the dealer and they explained BMW was aware of the problem with the fuel pump and fuel injection system and they would take proper steps to ensure the problem was fixed. To my knowledge they changed the fuel pump and whatever other seals needed to be changed. Car seemed to work just fine for about 6 weeks, now the problem has returned. The vehicle now has to crank for an inordinate amount of time again in order to get the car to start. I am concerned this will not be properly fixed again. The car is not yet at 10k miles and I am having to bring it in to be fixed for a second time. This is very disconcerting. **please note, the system would not allow the 335i as an option for the 2009 year, only when I chose the year as 2008, please note however that this is a 2009 BMW not a 2008**.