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!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Oxygen Sensor: Service and Repair


1. Disconnect Oxygen Sensor(s) from harness.
2. Unthread Oxygen Sensor(s) from exhaust manifold.
3. Reverse procedure to install.
4. Torque Oxygen Sensor(s) to 33lb.ft. (45 Nm).

Note: Apply anti-seize compound to Oxygen Sensor(s) threads, being careful NOT to get any on the protection tube, prior to installing.