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Home >> BMW >> 2019 >> X3 M40i >> Repair and Diagnosis >> External Pages >> Different car >> Section 575 (Functional Descriptions - F25 - Cooling System, Engine Performance) >> Cooling System - Functional Description >> Coolant pump, low temperature exhaust-gas recirculation cooler >> Functional description

Functional description

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The electric coolant pump of the low temperature EGR cooler is a single stage radial pump.

The coolant enters the coolant pump in an axial plane, while the discharge is radial relative to the road wheel's rotational axis. The auxiliary water pump is powered by a brushless electric motor. The engine control (DDE) activates the coolant pump.

Fig 1: Identifying Coolant Pump And Plug Connection
G09908772Courtesy of BMW OF NORTH AMERICA, INC.
Item Explanation
1 Coolant pump, low temperature exhaust-gas recirculation cooler
2 three-pin plug connection