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oxygen sensor.

  1. 3rd Generation Altima (2002-2006)
    My 2005 Altima is having some idle patterns. 2days ago the car was in drive and I was waiting for the light to turn green and it was idling around 300-200 rpm and the car turned off. This was never a problem, but about 1 week I did install an aftermarket exhaust header and a cat back exhaust. I...