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      05-15-2013, 03:09 AM   #5
Major General
United Kingdom

doughboy's Avatar
Drives: E91 335i Sold.
Join Date: Jan 2009
Location: UK

Posts: 6,375
iTrader: (2)

Buy your new spark plugs and take one to the tool shop and find a the slimmest socket to fit.

Looking on realoem your plugs look like fairly chunky regular hex socket:

Whereas the 335i / N54 that needs a thin walled 12 point socket has thinner plugs like this:
335i gone E63 AMG here at last!