Overview - Ignition System

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Shown on a 3.0L engine.

Fig 1: Exploded View Of Ignition System

Courtesy of AUDI OF AMERICA, LLC

Bolt
- 25 Nm
- Tightening specifications affect the function of the knock sensor
Knock Sensor 2 -G66-
- Removing and installing. Refer to Knock Sensor 1 -G61- / Knock Sensor 2 -G66-, REMOVING AND INSTALLING .
O-Ring
- Always replace after removing.
Camshaft Position Sensor 2 -G163-
- Intake side
- Removing and installing. Refer to CAMSHAFT POSITION SENSOR, REMOVING AND INSTALLING .
Bolt
- 9 Nm
O-Ring
- Always replace after removing.
Camshaft Position Sensor 4 -G301-
- Exhaust side
- Removing and installing. Refer to CAMSHAFT POSITION SENSOR, REMOVING AND INSTALLING .
Bolt
- 9 Nm
Spark Plug Connectors
- Installation position. Refer to IGNITION COILS, REMOVING AND INSTALLING .
Bolt
- Tightening Specification: → Maintenance
Ignition Coil
- Ignition Coil 1 with Power Output Stage -N70-
- Ignition Coil 2 with Power Output Stage -N127-
- Ignition Coil 3 with Power Output Stage -N291-
- Ignition Coil 4 with Power Output Stage -N292-
- Ignition Coil 5 with Power Output Stage -N323-
- Ignition Coil 6 with Power Output Stage -N324-
- Removing and installing. Refer to IGNITION COILS, REMOVING AND INSTALLING .
Spark Plug
- Removing and installing. Refer to SPARK PLUGS, REPLACING
- Replacement interval. Refer to MAINTENANCE, DIAGNOSIS .
- Tightening Specification. Refer to SPARK PLUGS, REPLACING
O-Ring
- Always replace after removing.
Camshaft Position Sensor 3 -G300-
- Exhaust side
- Removing and installing. Refer to CAMSHAFT POSITION SENSOR, REMOVING AND INSTALLING .
Bolt
- 9 Nm
O-Ring
- Always replace after removing.
Camshaft Position Sensor -G40-
- Intake side
- Removing and installing. Refer to CAMSHAFT POSITION SENSOR, REMOVING AND INSTALLING .
Bolt
- 9 Nm
Knock Sensor 1 -G61-
- Removing and installing. Refer to Knock Sensor 1 -G61- / Knock Sensor 2 -G66-, REMOVING AND INSTALLING .
Bolt
- 25 Nm
- Tightening specifications affect the function of the knock sensor
Bolt
- 9 Nm
Engine Speed Sensor -G28-
- Removing and installing. Refer to Engine Speed Sensor -G28-, REMOVING AND INSTALLING .
O-Rings
- Always replace after removing.