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:
REPLACING FUEL FILTER (M57T2)
Necessary preliminary tasks:
Switch off ignition
Remove rear assembly underside protection
Recycling:
Catch and dispose of escaping fuel.
Observe country-specific waste-disposal regulations.
Release clamps (1).
Pull off hose.
Pull out retainer (2).
Detach fuel
(cylinder bank 1 to 4)
NOTE: To remove the exhaust manifolds, the engine must be secured in
the
installation position with the special tool and then the front axle bracket
lowered.
Remove right exhaust manifold.
After removing exhaust manifolds:
Reinstall front axle bracket provisionally and remove