BMW X5: Engine Mechanical Overview
BMW X5 (G05) 2019-2026 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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HPI Function
The fuel is delivered from the fuel tank by the electric fuel pump via the
feed line (5) at an "feed" pressure of 5
bar to the high pressure pump. The feed pressure is monitored by the
low-pressure sensor (6). The fuel is
delivered by the electric fuel pump in line with demand.
If this sensor fai
Convenient-Start System - System Functions
The convenient-start system allows the engine to be started in a
user-friendly manner as the starter motor
automatically remains engaged until the engine is running.
When the START-STOP button is pressed, the CAS control unit first activates
terminal 15. The relief relay for
the ignition coils is
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