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

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Knock Sensor: Locations

Knock sensor(s) (M43 from 9/95, M43TU, M44)







Location: For cylinder group 1-2, knock sensor (1) must be seen between oil filter and intake system.






Note: The knock sensor (1) on cylinder bank 1-2 is screw-mounted to water pipe on engine block.






Release screw at knock sensor (2) of cylinder group 3-4, remove knock sensor.