A8L Quattro Sedan V8-4.2L (BVJ) (2007)
Knock Sensor: Service and Repair
Knock Sensors
CAUTION!
‹› Fuel system is under high pressure! Before opening the high pressure components of the fuel injection system, the pressure must be
relieved to a residual pressure. Refer to => [ High Side Fuel Pressure, Reducing ] See: Fuel Delivery and Air Induction/Fuel
Filter/Fuel Pressure Release/Service Precautions.
‹› Then wrap a clean cloth around the connection and relieve the residual pressure by carefully loosening the connection.
Removing
-
Remove the intake manifold, refer to one of the following:
‹› With a magnesium intake manifold, refer to => [ Intake Manifold ] See: Engine, Cooling and Exhaust/Engine/Intake Manifold/Service and
Repair/Intake Manifold and Injectors, with Magnesium Manifold.
‹› With a plastic intake manifold, refer to => [ Upper Intake Manifold ] See: Engine, Cooling and Exhaust/Engine/Intake Manifold/Service and
Repair/Intake Manifold and Injectors, with Plastic Manifold.
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Remove the Knock Sensor (KS) 1 - 2 - or the KS 2 - 9 -.
-
Remove the KS 3 - 8 - or the KS 4 - 1 -.
Installing
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Install the respective KS in its installed location.