Quote:
Originally Posted by CJ_Boxster
As a former Porsche tech, I can tell you with 100% certainty that you must replace all 4 o2 sensors. Perfectlap is correct, sometimes you can get away with replacing one but usually you end up having to replace all 4.
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OP doesn't even know if his one O2 is bad and you're blanketly advising to replace all 4 sensors.
Honestly, this ranks up there as one of the more irresponsible posts in recent memory on this board... unless you are being facetious which cannot be inferred at all from your "qualifying" disclosure.
Oh my...