Knock Sensor: Service and Repair

Knock Sensor (KS)













Removal and Installation

1. Remove the thermostat housing.

2. Remove the lower intake manifold.

3. Remove the coolant tube.
- Discard the O-ring seal.


4. Disconnect the Knock Sensor (KS) electrical connector.

5. NOTICE: Only use hand tools when removing or installing the Knock Sensor (KS) or damage to the KS (Knock Sensor) can occur.

Remove the 2 bolts and the KS (Knock Sensor).
- To install, tighten to 20 Nm (177 lb-in).


6. To install, reverse the removal procedure.
- NOTE: Genuine Mazda(R) Extended Life Coolant and Motorcraft(R) Specialty Green Engine Coolant are very sensitive to light. Do NOT allow these products to be exposed to ANY LIGHT for more than a day or two. Extended light exposure causes these products to degrade.
Lubricate the new O-ring seal with clean engine coolant.