BMW X5: Engine Mechanical Overview
BMW X5 (G05) 2019-2025 Service & Repair Manual / Engine Service Information / Engine Mechanical Overview
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Crankcase
As far as the physical appearance and dimensions, the crankcase on the N54 is
the same as the N52. The main
change is in the materials, the N54 uses an all aluminum alloy crankcase. There
is also ca
Bolts
Although, the N54 engine has an all aluminum crankcase, many of the bolts are
still aluminum as on the N52.
This is to reduce any potential confusion between steel and aluminum bolts.
Some bolts, fo
Cylinder Head Cover
As stated before, the cylinder head cover used on all of the new NG6 engines
is made from plastic. However, the design differs between the engines due to
engine equipment.
For example, the N54 engi
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Repairing Airbag Cables
IMPORTANT: Only repair those cables which show visible signs of damage.
In the event of
visible damage, make sure there is only one cable repair in effect after the
repair work. If no visible damage can be identified, the entire cable must be
replaced. When carrying out repairs to the airbag wiring
Limp-Home Mode
If a fault is diagnosed in the system, such as e.g. failure of the
high-pressure sensor, the fuel-supply control
valve is de-energized; the fuel then flows via a so-called bypass into the rail.
In the event of HPI limp-home mode, turbocharging is deactivated by an opening
of the wastegate valves.
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