BMW X5: Ignition Wires, Spark
REPLACING ALL SPARK PLUGS (N42, N40, N46, N45, N52, N52K, N51)
Special tools required:
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 171and special tool 12 1 200
(torque limiter).
Without special tool 12 1 200, observe tightening torque.
Tightening torque 12 12 1AZ0.

Fig. 1: Identifying Special Tool (12 1 171) And (12 1 172)
READ NEXT:
NOTES ON CHECKING IGNITION SYSTEM
Troubleshooting -> Fault in fuel injection system
-> Spark plug faults
-> Ignition coil faults
-> Further fault patterns with evaluation
-> Additional
IMPORTANT: Read and comply with notes on protection against
electrostatic damage (ESD
protection).
IMPORTANT: Aluminum-magnesium materials.
No steel screws/bolts may be used due to the threat of ele
SEE MORE:
Special tools required:
36 1 030
Necessary preliminary tasks:
Check wheel bearings
Lift vehicle.
Check wheel with special tool 36 1 030 (measuring fixture) for lateral runout.
If applicable, remove balance weights.
Check lateral runout of rim with special tool 36 1 030 (measuring fixture).
Special tools required:
34 1 280.
Necessary preliminary tasks:
Remove front wheels.
Remove and clean brake pads.
After completing work, read and comply with notes on braking in new brake
discs / brake pads.
Check minimum brake disc thickness:
Position special tool 34 1 280 at three measu