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CJ_Boxster · 10-02-2014, 02:49 PM

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.

10-02-2014, 02:49 PM	#6
CJ_Boxster Registered User Join Date: Jul 2006 Location: Where the Sewer Meets the Sea, CA. USA Posts: 2,695	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. __________________ --Proud Boxster Owner/Tech, Carlos J Cazares FastForward Performance http://i10.photobucket.com/albums/a1...er/newsig1.jpg