Battery Specifications (BMW 5 Series E12)

The negative terminal of the battery is connected to the car's ground. Brand: Varta or Berga.

Overall dimensions, cm;

• length: 23.6;
• width: 17.2;
• height: 19.

Nominal voltage, V: 12.

Nominal capacity, Ah:

• "518": 36;
• "520", "520i": 44 (55 Ah battery was installed on request);
• "525", "528": 55.

Minimum voltage in starter mode, V: 8.5.

Since the 1980 model year, the BMW "518" has been equipped with a battery with a nominal capacity of 44 Ah as standard.