Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSAUDI2012S4 QUATTRO SEDAN (8K2) V6-3.0L SC (CCBA)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSKNOCK SENSORSERVICE AND REPAIR
2012 Audi S4 Quattro Sedan (8K2) V6-3.0L SC (CCBA)
Knock Sensor: Service and Repair
2012 Audi S4 Quattro Sedan (8K2) V6-3.0L SC (CCBA)SECTION Service and Repair
Knock Sensor (G61)/Knock Sensor (G66)
Removing
- Remove supercharger.
- Remove left and right lower intake manifold sections. Refer to => [ Intake Manifold Lower Section, with Fuel Rail ] Intake Manifold Lower Section, With Fuel Rail.
- Pull the Knock Sensor (KS) 1 connector - 1 - out of the mount and disconnect it.
• Ignore - 2 - and - arrow -.
- Pull the KS 2 connector - 2 - out of the left mount and disconnect it.
• Ignore - 1 and 3 - and - arrow -.
- Remove the bolts - 1 - for KS 1 and the bolt - 2 - for KS 2 and remove the sensors.
Installing
• Tightening specification, refer to => [ Ignition Overview ] Service and Repair.
Install in reverse order, paying attention to the following:
- Install the left and right lower intake manifold sections. Refer to => [ Intake Manifold Lower Section, with Fuel Rail ] Intake Manifold Lower Section, With Fuel Rail.
- Install supercharger.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.