Electric Coolant Pumps: Temperatures

The set temperature for the low temperature cooling circuit is 65°C at the temperature sensor downstream of the PEB. As of 70°C, reduction of the controlled power in the PEB and at the APM begins in order to reduce the heat generation.

Fig 1: Engine Cooling Circuits Of E71 And E72

Courtesy of BMW OF NORTH AMERICA, INC.

Fig 2: Low Temperature Cooling Circuits Of E71 And E72

Courtesy of BMW OF NORTH AMERICA, INC.