REPLACING ALL SPARK PLUGS (N42, N40, N46, N45, N52, N52K, N51)
Special tools required:
12 1 171
12 1 200
Necessary preliminary tasks:
Switch off ignition
Remove ignition coils.
Unscrew spark plugs with special tool 12 1 171.
Installation:
Tighten down spark plugs with special tool 12 1 171an
Special tools required:
36 1 010
36 1 020
Necessary preliminary tasks:
Remove wheel
IMPORTANT: Use only BMW-approved balance weights.
Remove any fitted balancing weights, stones in tread pattern and larger
contaminants.
Check tire pressure, check tire for condition, damage, flat spots (out-