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)

Or, hide this message: temporarily or permanently

Knock Sensor: Service and Repair

Knock Sensor Replacement:





1. Remove bolts (arrows).
2. Unplug connector at ignition control module.
3. Unclip protective hose for cables.

NOTE: The cables of both knock sensors (A16) are combined in the protective hose (corrugated hose). They can only be replaced as a unit.

4. Install in reverse order, tighten knock sensors to 20 Nm (14.8 ft lb).