Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

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Emission Control Systems: Specifications






Fastener Tightening Specifications






1 Always replace

2 When reusing an oxygen sensor, only use hot bolt paste (G 052 112 A3) on the threads. Do not let the paste get onto the slits of the oxygen sensor body.