Quote:
Originally Posted by reynald3616
Ok so it turns out to be a bad front O2 sensor and now i need a new one. I dont know which one to buy the upstream or downstream o2 sensor? And what brand is a good one with a good price and where to buy them? Thanks in advance
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Up=stream is the front...usually the rear one's tuned with.
They can be damaged if you used impact wrenches to remove bolts,etc..when removing/installing lth's