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Showing results for tags 'post cat'.
I need to replace the O2 sensor on my 1999 996 TT. Two questions 1) Is there one or 2 post cat O2 sensors on the car? (are there two cats?) 2) any info on the replacement? I searched and can't seem to find any details. do I need to put it on a lift or can I get to it with jackstands. Any hints or tricks? Thanks all. I appreciate the great feedback.