BMA 0 Report post Posted December 8, 2004 I was reading a manual for E30s and it says all BMWs use 13/16 inch (21mm) socket for bmws. But like my spark plugs use 16mm socket, and i dont think 21mm socket is for small cars, cuz the socket is for really big spark plugs. Do u guys think this was a typo in the manual? Quote Share this post Link to post Share on other sites
