BMW X5: Troubleshooting
- Contents Of Engine Electrical System General
- Instructions For Removing And Installing Electronic Control Units
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Contents Of Engine Electrical System General
General Information
Working on ignition system
Removing and installing electronic control units
Welding work (overload protection of control units)
Disconnecting and connecting battery
Disconnec
Instructions For Removing And Installing Electronic Control Units
IMPORTANT:
Disconnecting the vehicle battery will cancel the fault memories
of control
units. Consequently, before disconnecting the car's battery, always
interrogate the fault memories. Invest
Ignition Wires, Spark Plugs
FIRING ORDER
Fig. 3: Firing Order (V8)
REPLACING ALL SPARK PLUGS (N62, N62TU)
Special tools required:
12 1 171
12 1 172
Necessary preliminary tasks:
Switch off ignition
Remove all IGNITION CO
SEE MORE:
Oil Filling, Dipstick
REMOVING AND INSTALLING/SEALING GUIDE TUBE FOR OIL DIPSTICK (N62)
Necessary preliminary tasks:
Remove intake air manifold.
Drain engine oil.
NOTE: For purposes of clarity, this work step is shown on the engine
after it has been
removed.
Unlock and detach vacuum line (1).
Release screws and re
Gaskets And Seals
Head Gasket
The head gasket design on the N54 is unique to that engine.
It features a multi-layer steel design. There is no silicone rubber perimeter
"shelf" as on the N52. This is not
needed due to the aluminum block on the N54.
The N52KP and N51 engines are still using the head gasket that is f
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