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      11-06-2012, 06:20 AM   #147
First Lieutenant

Drives: E92 335XI
Join Date: Mar 2011
Location: Chicago, IL

iTrader: (4)

I have a 335 with Cobb stage 2+ aggressive. I sometimes have cyl 2 misfire issue at WOT so I suspect its the cyl 2 faulty ignition coil. Im thinking if I should just replace the faulty coil or replacing all the coils at once as I heard once a coil fails, the other coils will fail soon. I have 68k miiles on my car and replaced spark plugs once at 43k and done walnut blasting at 67k. How long do the ignition coils last on a 335? Do you guys recommend me to replace just the faulty coil and wait until the others fail?

Last edited by kahoho1; 11-06-2012 at 05:01 PM.