BMW 3 Owners & Service Manuals

BMW 3: Low-voltage Vehicle Electrical System

BMW 3 Series G20 (2018-2024) 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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 Through-loading system

Concept The cargo area can be enlarged by folding down the rear seat backrest. General information The rear seat backrest is divided at a ratio of 40-20-40. The side rear seat backrests and the center section can be folded down separately. The rear seat backrests can be folded down from the cargo a

 Climate control

Automatic climate control Temperature. Recirculated-air mode. Maximum cooling. AUTO program. Air distribution, manual. Switching off. Defrost and defog the windshield. Rear window defroster. Seat heating. Climate control operation. Air flow, manual. Automatic climate control with enhanced

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