View Single Post
      07-20-2010, 09:03 PM   #7
jch8479
Enlisted Member
1

 
Drives: 2006 330i
Join Date: Dec 2009
Location: wilmington, NC


Posts: 33
iTrader: (0)

I always run 93, dad mentioned it could be the microfilter. Are those costly to replace? How do u know if your cat is under warranty?