S5 Quattro Coupe V8-4.2L (CAUA) (2009)
Knock Sensor: Service and Repair
Knock Sensors
Electrical connectors
6
Knock Sensor (KS) 3 (G198)
7
Knock Sensor (KS) 4 (G199)
9
Knock Sensor (KS) 2 (G66)
10
Knock Sensor (KS) 1 (G61)
Removing
CAUTION!
‹› Fuel system is under high pressure! Before opening high pressure components of the fuel injection system, pressure must be relieved
to residual pressure. Refer to => [ Before Opening High Pressure Fuel Injection System ] See: Fuel Delivery and Air Induction/Fuel
Filter/Fuel Pressure Release/Service and Repair.
‹› Then wrap a clean rag around the connection and relieve residual pressure by carefully loosening the connection.
‹› Observe safety precautions when disconnecting the battery.
-
Remove intake manifold. Refer to => [ Intake Manifold ] See: Engine, Cooling and Exhaust/Engine/Intake Manifold/Service and
Repair/Magnesium.
Remove the Respective Right Cylinder Bank Knock Sensor.
2
Knock Sensor (KS) 1 (G61)