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Discussion Starter #1
Is there an O2 sensor on a TDI? I was under the impression that there isn't one.

Thanks.
 

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2003 and earlier do not have O2 sensors. 2004 and later do. It's visible in the exhaust downpipe. Unlike a gasoline car it is not directly used for metering fuel in any way. It's only used for metering EGR.
 
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