[300hp]

Originally Posted by Pang

Has anyone figured out this problem? Our 2014 335i is currently with BMW service for the 3rd time within a month for the "Drivetrain malfunction".

The service adviser has been good at keeping us in the loop with updates. So far they have replaced the Vanos units, adjusted the Vanos bolts, checked the engine timing, checked camshafts, camshaft journals. They said the next options per BMW is to replace the DME or cylinder head. This car only has 9k mile on it! I'm not sure how comfortable I feel with having the cylinder head torn apart and replaced at such low mileage.

Has anyone gone the Lemon law route?

My 13 335i had similar issues. The first time they replaced the DME and some drivetrain bearings and Vanos related items were replaced. Second time the cylinder head was replaced. The car was probably in the shop for over 3 weeks in total. The first time I did not get any error messages. I noticed that at start up and when starting when using ASS the cars revved to about 2000 rpm. Sometimes when starting from a cold start the car would almost stall just after driving off. The second time I did get the drivetrain malfunction error and could not get more than 150 horses and 150 tq based on the sport displays. The car was cutting power around 150 horses.


When the car was in the shop for the second time I called BMW , we had a five minute discussion that I needed to have my car replaced. They said give us a day or three to think this through and I now have a 2014 335i.

Your experience may not play out like mine but only BMW can decide what's going to happen in your case. Call them

here is the thread i started back then

http://f30.bimmerpost.com/forums/sho...d.php?t=879819