Ignition Coil: Service and Repair

12 13 511 - Replacing ignition coils (N54, N53, N43)





Necessary preliminary tasks:
- Read out fault memory of DME control unit.
- Check stored fault messages
- Switch off ignition
- Remove acoustic cover Removing and Installing/Replacing Ignition Coil Cover
- If necessary, remove acoustic cover at rear
- E71: Remove clean air pipe





Important!
Ignition coils must not be fouled by fuel.
The resistance of the silicone material is reduced significantly by contact with fuel, which may cause the ignition coil to fail!





Unlock plug fastener (1) of ignition coil (2) and disconnect plug.
Pull ignition coil (2) up and out.
This procedure is applicable to all ignition coils.





Installation:
Check that rubber seal of ignition coil (1) is correctly seated.





Installation:
Push plug (1) with plug fastener (2) open onto ignition coil.
Carefully close plug fastener (2) in direction of arrow.
The plug fastener must snap into place without great effort.





Note:
Now clear the fault memory.