VWVortex - HELP! O2 sensor wiring diagram! so i called that guy at Casper's, someone posted the link the other day, and he's not sure if he's got something to fool the post-cat O2 sensor. he asked for a wiring How to Replace the Oxygen Sensor in a Jetta | It Still Runs How to Replace the Oxygen Sensor in a Jetta by Dan Ferrell . Replacing the oxygen (O2S) sensor on your Volkswagen Jetta is a simple process.
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