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  1. 7 Series - E65 / E66 (2002 - 2008)
    all websites say to use the iridium plug IZFR6H11, when I first got my car, I went to AutoZone and got some and put it in my 750i and it hated it. the piston was touching the plug witch is very bad on their computer it said the plug they sold me fit my car. i went with my gut and bought the...
  2. E90/E91/E92/E93 (2006 - 2013)
    Changed out the spark plugs on my 2008 328i because I wasn't sure when the previous owner last had them replaced. I attached two pictures and would like to know if I just wasted my time and money on new ones or if it was a good call to change them out. Either way, it was a fun experience and I...
  3. E90/E91/E92/E93 (2006 - 2013)
    My wife has been putting 87 octane In the car, And now it is running like crap. I put octane boost in and it's not seeming to do anything. I put a computer on it this morning and it's showing misfires on 1,3,5. Should I start with just replacing the spark plugs before I worrie about the coils...
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