What is TWC (RE Oxygen Sensor)? - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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		986 Forum - The Community for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Boxster General Discussions
What is TWC (RE Oxygen Sensor)?

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06-12-2009, 01:02 PM	#1
gschotland Registered User Join Date: Apr 2006 Location: nj Posts: 389	What is TWC (RE Oxygen Sensor)? Looking through the PO's service recs I found "Replaced O2 sensor for Bank #1 ahead of TWC." Could find anything in this forum or in the Bentley manual. I did see TWC mentioned on another forum, but no explanation of what it is. What is the TWC? I want replace the 3 other O2 sensors, so I need to know whether to buy 2 pre-cat & 1 post-cat or vice versa. Thanks, Gary '02 S

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