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Old 11-01-2012, 09:22 PM   #7
sb_600
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Join Date: Apr 2010
Location: Ottawa, ON
Posts: 1,033
The rear o2 won't do anything. All it does is make sure the cat works properly. You need to try the front one
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Shawn
1992 3.0L M52 325i (ex-daily driver - current RACECAR)
2002 330Ci (ex-daily driver - sold!)
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