Battery, Generator and Starter Specifications (BMW 3 Series E21)

Battery

Technical specifications

Generator

Bosch brand alternating current generator, three-phase, with built-in rectifier unit and electronic voltage regulator.

Generator technical characteristics

Starter

Starter brand Bosch type EF 12V ("316", "318") or GF(R) 12V (other models).

Technical characteristics of the starter

Windscreen wiper motor

Brand and type: Bosch 0390 241 056 or SWF.

Nominal voltage, V: 12.

Working voltage. V: 12±2.4.

Control voltage, V: 13±0.26.

Gearbox shaft rotation frequency, rpm:

• first (small): 52±5;
• second (large):
• cars with 4-cylinder engines: 68±5; cars with 6-cylinder engines: 73±8.