Pre-Charge Pump
The pre-charge pump is located below the master cylinder in the left side of the engine compartment.
During ASC or DSC regulation with brake intervention, the DSC control unit activates the pre-charge pump. The pump delivers brake fluid at a pressure of 10 to 15 Bar to the front axle circuit of the master cylinder. The pressurized fluid also acts on the rear brake circuit of the master cylinder as well.
The Pre-charge pump ensures that an adequate amount of brake fluid is available at the hydraulic unit during brake regulation.