BMW 3-Series (E90 E92) Forum - View Single Post - Help E90 Error Code P0303 Cylinder 3 Misfire

bimmergixxer · 10-15-2018, 07:09 AM

These engines are famous for coil failure. I would doubt the plug would fail but its probably the coil. Best way to check is to unplug the coil and see if there is any change in engine rpm. Also take off the coil of cylinder 3 and switch it to another cylinder like #1 since its easiest, and you will probably now have a cylinder 1 misfire.

10-15-2018, 07:09 AM	#17
bimmergixxer Railside Performance 48 Rep 331 Posts Drives: E92 M3 R8 V10 Q5 Join Date: Nov 2009 Location: Railside Performance iTrader: (8) Garage List 2010 Ducati Streetf ... [7.00] 2017 Q5 [0.00] 2017 BMW R NineT Racer [5.00] 2010 Audi R8 V10 Ma ... [0.00] 2008 M3 [10.00]	These engines are famous for coil failure. I would doubt the plug would fail but its probably the coil. Best way to check is to unplug the coil and see if there is any change in engine rpm. Also take off the coil of cylinder 3 and switch it to another cylinder like #1 since its easiest, and you will probably now have a cylinder 1 misfire. __________________ E92 M3 Manual R8 V10 Manual / Audi Q5 Ducati Streetfighter 1098 / BMW R NineT Racer Ducati Monster 796 / Ducati Bronco 1964 Railside Performance
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