Spark Plug: Service and Repair

12 12 011 Replacing All Spark Plugs (N54, N63, N74)

Special tools required:







Necessary preliminary tasks:
- Switch off ignition.
- Remove ignition coils.







IMPORTANT:
Wear safety goggles.
Oil and dirt particles may get into your eyes.

Clean spark plug slot with compressed air.







Unscrew spark plugs with special tool 12 1 220 and extension with min. 8°bend.







Attach new spark plug (1) to special tool







Screw spark plug with special tool 12 1 230 hand-tight into cylinder head plug thread as far as it will go.







Installation note:
Tighten spark plugs with torque wrench, special tool 12 1 220 and extension with min. 8°bend.
Observe tightening torque.
Tightening torque 12 12 2AZ.