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      11-07-2012, 06:10 PM   #8

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Drives: E90
Join Date: Sep 2005
Location: MTL, Canada

Posts: 2,389
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Originally Posted by Eric335 View Post

Replace the other 4 at the same time, so that if you keep the car for another 30k miles, you will know that they all are about the same age. Thats what i would do once they all start misfiring. I will be doing this eventually.
This should happen way beyond only 70000 miles, IMO...
2007 E90 AW 323i Step | Lowered 1.25"/1" | BMW Performance Exhaust | Debadged | Scangauge II | Style 162 18" & 161 17" wheels & rear 15mm spacers