maxradin 
2007 BMW 3 Series Sedan 328i 4dr Sedan (3.0L 6cyl 6M)
Plastic engine parts - really?
 Just spent a bundle fixing an oil leak caused by a PLASTIC valve cover that cracked. This is apparently common for these models after 60K. Mine had 76K and was regularly serviced at the dealer. In my case, oil leaked onto the ignition coils, causing the engine to misfire. Unbelievable that the 'ultimate driving machine' uses plastic on a part that is subject to such heat.