Overview - Ignition System

Shown on a 3.0L engine.

Fig 1: Exploded View Of Ignition System

Courtesy of AUDI OF AMERICA, LLC

1. Bolt
   • 25 Nm
   • Tightening specifications affect the function of the knock sensor
2. Knock Sensor 2 -G66-
   • Removing and installing. Refer to Knock Sensor 1 -G61- / Knock Sensor 2 -G66-, REMOVING AND INSTALLING .
3. O-Ring
   • Always replace after removing.
4. Camshaft Position Sensor 2 -G163-
   • Intake side
   • Removing and installing. Refer to CAMSHAFT POSITION SENSOR, REMOVING AND INSTALLING .
5. Bolt
   • 9 Nm
6. O-Ring
   • Always replace after removing.
7. Camshaft Position Sensor 4 -G301-
   • Exhaust side
   • Removing and installing. Refer to CAMSHAFT POSITION SENSOR, REMOVING AND INSTALLING .
8. Bolt
   • 9 Nm
9. Spark Plug Connectors
   • Installation position. Refer to IGNITION COILS, REMOVING AND INSTALLING .
10. Bolt
    • Tightening Specification: → Maintenance 
11. 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 .
12. Spark Plug
    • Removing and installing. Refer to SPARK PLUGS, REPLACING
    • Replacement interval. Refer to MAINTENANCE, DIAGNOSIS .
    • Tightening Specification. Refer to SPARK PLUGS, REPLACING
13. O-Ring
    • Always replace after removing.
14. Camshaft Position Sensor 3 -G300-
    • Exhaust side
    • Removing and installing. Refer to CAMSHAFT POSITION SENSOR, REMOVING AND INSTALLING .
15. Bolt
    • 9 Nm
16. O-Ring
    • Always replace after removing.
17. Camshaft Position Sensor -G40-
    • Intake side
    • Removing and installing. Refer to CAMSHAFT POSITION SENSOR, REMOVING AND INSTALLING .
18. Bolt
    • 9 Nm
19. Knock Sensor 1 -G61-
    • Removing and installing. Refer to Knock Sensor 1 -G61- / Knock Sensor 2 -G66-, REMOVING AND INSTALLING .
20. Bolt
    • 25 Nm
    • Tightening specifications affect the function of the knock sensor
21. Bolt
    • 9 Nm
22. Engine Speed Sensor -G28-
    • Removing and installing. Refer to Engine Speed Sensor -G28-, REMOVING AND INSTALLING .
23. O-Rings
    • Always replace after removing.