Electrical & electronics
Starter motor
Turns a combustion engine fast enough to begin running.
Attached near the engine-to-gearbox interface.
A high-current motor engages the engine’s starting gear under controlled conditions.
An electric hand giving the engine its first turn.
Clicking or no cranking may involve the battery, cables, authorization or starter.
Batteries and connections depend on age, charging and usage. Control units are diagnosed by faults, power and communications.
A fuse or connection differs from a coded controller. Identify the cause before replacing an expensive electronic module.
BMW start-stop and hybrid starting arrangements depend on the particular powertrain.
BMW low-voltage systems across combustion, hybrid and electric models; equipment varies.
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