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Home >> BMW >> 2019 >> X3 M40i >> Repair and Diagnosis >> External Pages >> Different car >> Section 576 (Functional Descriptions - F25 - Charging System, Anti-Theft, Body Electrical Systems) >> Body Electrical System - Functional Description >> Parking brake (electromechanical parking brake = EMF) >> Brief component description >> Parking brake control unit

Parking brake control unit

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The parking brake control unit is located in the spare wheel well.

The EMF control unit receives the driver request to engage the brake via the parking brake button on the center console. The vehicle condition is detected via the bus system. The EMF control unit decides whether all the preconditions for engaging have been complied with. If this is the case, the two EMF actuators on the rear brake calipers are activated.

Fig 1: Identifying Parking Brake Control Unit And Plug Connection
G09909330Courtesy of BMW OF NORTH AMERICA, INC.
Item Description
1 Control unit, electromechanical parking brake (EMF)
2 22-pin plug connection

The parking brake control unit is powered three times with terminal 30 from the power distribution box on the battery.

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