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:
IMPORTANT: Comply with notes and instructions on handling
fiber-optic cables.
Necessary preliminary tasks:
Remove side section on rear seat backrest on left.
Remove fiber optic cable (1) from holder (2).
Unlock fiber optic cable plug (3) and remove.
Fig. 75: Identifying Fiber Optic Cable, Fibe
Yellow lights
Steering Assistant
The indicator light lights up
and an
acoustic signal may sound: a system interruption
is imminent.
The indicator warning light flashes: lane marking
driven over.
Additional information:
Steering and Lane Control Assistant.
Antilock Braking System ABS
The Brake Ass