Check all the usual tuneup parts; coils/plugs/sensors...if nothing changes, do a compression test. Not uncommon for those motors to bend a valve and loose all compression in one cylinder, causing missfire (sometimes almost unnoticable in the way engine runs, other than CEL).
Specialized in BMW recycling, all OEM used parts
Up to 90% off new cost!!!
Most models E30 E36 E46 E90 E92 E93 E34 E39 E60 E32 E38 E65 E66 X3 X5 M3 M5 Z4
Etobicoke location opening mid June!!!!
Call 11-8PM 416 821-2578
New inventory daily. 50+ cars in stock!