Overview - Ignition System

2018 Audi A5 Quattro Prestige, 2D ConvertibleSECTION Overview - Ignition System
WARNING: This page is about a different car, the 2020 Audi A3, 2019 Audi A3, and 2018 Audi A3. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Exploded View Of Ignition System
GWWA28-10181Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.
  1. Bolt
    • 8 Nm + 90°
    • Always replace after removing.
    • The tightening specifications affect function of the knock sensor
  2. Knock Sensor 1 -G61-
  3. Spark Plug
    • 30 Nm
  4. Spark Plug Connectors
  5. Ignition Coil with Power Output Stage
    • 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-
  6. Bolt
    • 10 Nm
  7. Nut
    • 9 Nm
  8. Bolt
    • 9 Nm
  9. Camshaft Position Sensor 3 -G300-
  10. O-Ring
    • Replace if damaged
  11. O-Ring
    • Replace if damaged
  12. Camshaft Position Sensor -G40-
  13. Bolt
    • 9 Nm
  14. O-Ring
    • Replace if damaged
  15. Engine Speed Sensor -G28-
    • Removing and Installing. Refer to ENGINE SPEED SENSOR -G28-, REMOVING AND INSTALLING .
    • Perform the adaptation after removing or replacing using the Vehicle Diagnostic Tester 01 - ENGINE ELECTRONICS, FUNCTIONS  , 01 - CHAIN LENGTH DIAGNOSTIC ADAPTATION 
  16. Bolt
    • 4 Nm + 45°
    • Always replace after removing.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.