BMW 3: Low-voltage Vehicle Electrical System
BMW 3 Series G20 (2018-2025) Training manual / Low-voltage Vehicle Electrical System
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Voltage supply
The 12 V vehicle electrical system of the G20 PHEV is essentially the same as
the electrical system of
the G20. The main difference lies in the fact that the power supply is no longer
by the al
Start-up system
Starter motor
The combustion engine B46 can be started via the conventional starter motor
and the electrical
machine.
The following table shows when and under which conditions the respective start
Terminal control for driving readiness
Terminal control from driver's view
Vehicle condition - DRIVING
Vehicle condition - RESIDING
Vehicle condition - PARKING
Transitional condition for establishing driving readiness,
ending driv
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Coolant
General information
Coolant consists of water and additives.
Not all commercially available additives are suitable
for the vehicle. Information about suitable additives
is available from a dealer's service center
or another qualified service center or repair shop.
Safety information
Warning
With t
Refueling
Refueling
Fuel cap
1. To open the fuel filler flap, press on the rear
edge, arrow. The fuel filler flap opens.
2. Turn the fuel cap counterclockwise.
3. Place the fuel cap in the bracket attached to
the fuel filler flap.
Gasoline
For the best fuel efficiency, the gasoline should
be sulfur-free or
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