A6 Quattro Sedan V8-4.2L (BVJ) (2007)
Knock Sensor: Service and Repair
Knock Sensors
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: Engine, Cooling and
Exhaust/Engine/Cylinder Head Assembly/Fuel Pressure Release/Service and Repair.
‹› Then wrap a clean rag around the connection and relieve residual pressure by carefully loosening the connection.
Removing
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Remove each intake manifold.
Vehicles with a magnesium intake manifold. Refer to => [ Intake Manifold ] See: Engine, Cooling and Exhaust/Engine/Intake
Manifold/Service and Repair/Intake Manifold.
Vehicles with a plastic intake manifold. Refer to => [ Intake Manifold ] See: Engine, Cooling and Exhaust/Engine/Intake Manifold/Service
and Repair/Intake Manifold.
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Remove Knock Sensor 1 (G61) - 2 - or Knock sensor 2 (G66) - 9 -.
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Remove Knock Sensor 3 (G198) - 8 - or Knock sensor 4 (G199) - 1 -.
Installing
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Attach the respective removed knock sensor in its installation location.