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: Locations






The right (2) and left (4) upstream oxygen sensors are installed in the exhaust pipe upstream of the left and right catalytic converters, and downstream of the left and right exhaust manifolds.

The right (1) and left (3) downstream heated oxygen sensors are installed into the center of the left and right catalytic converters.