Master Cylinder:

Master cylinder, fluid reservoir and level switch. All new components.

Fig 1: Identifying DCS III Hydraulic Unit Operation (1 Of 2)

Courtesy of BMW OF NORTH AMERICA, INC.

To ensure sufficient brake fluid supply is always available to the hydraulic unit during ASC/ DSC hydraulic regulation, the system requires an additional pumping system not equipped on any previous ASC + T system.

The pumping systems are different on the 750iL compared with the 740i/iL & 540iA and are as follows:

• 740i/iL & 540iA = Charge pump -  located next to the master cylinder.
• 750iL = Pre-boost pump  and separate charge piston  . These components are also mounted next to the brake fluid master cylinder and fluid reservoir.
  Fig 2: Identifying DSC III Hydraulic Unit Operation (2 Of 2)

  Courtesy of BMW OF NORTH AMERICA, INC.