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      10-31-2013, 07:09 PM   #8320
BQTuning
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Drives: 2012 Z4 sDrive35i M Sport 6MT
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Quote:
Originally Posted by loweredram View Post
Had another question. You mentioned it could be the o2 sensors going bad? Im thinking you're talking about the pre cat sensors? I Thinking that could be the issue i changed the post cat o2 sensors a year ago and the pre cat are factory originals my car is an 07.
Yes correct pre cats sensors
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