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Home >> Porsche >> 2016 >> Panamera 4 Edition >> Repair and Diagnosis (Single Page) >> Brakes >> Traction Control >> 45 - Anti Lock Brake System (Abs) -- PANAMERA (970) >> WM 453019 Removing And Installing Hydraulic Unit (Except PANAMERA Executive, PANAMERA Turbo S, PANAMERA 4 Executive, PANAMERA Platinum Ed., PANAMERA 4 Platinum Ed.) >> Removing And Reinstalling Hydraulic Unit >> Removing Hydraulic Unit

Removing Hydraulic Unit

Information 

Switch off the ignition for all replacement work on the hydraulic unit.

Fig 1: Identifying Position Of Hydraulic Unit
G09807935Courtesy of PORSCHE CARS NORTH AMERICA, INC.
NOTE: Replacing the hydraulic unit/control unit
  • The hydraulic unit forms a single unit with the control unit.
  • The hydraulic unit and control unit are always replaced together.
  • When replacing the hydraulic unit/control unit, the new assembly must be to hand before the old one is removed.
  • The data as well as the coding of the old control unit must be transferred to the new unit before the old one is removed.

→ When replacing, note the following: → 453055 REPLACING HYDRAULIC UNIT/CONTROL UNIT .

  1. Disconnect brake lines -2-  ().

    Information 

    The electric plug connection and the third fastening screw for the hydraulic unit are accessible from the wheel housing.

    Fig 2: Disconnecting Brake Lines
    G09807936Courtesy of PORSCHE CARS NORTH AMERICA, INC.
    1. 1.1. Mark three of the brake lines -2-  to prevent them from being confused.
    2. 1.2. Unscrew cap screws -1-  for the brake lines.
    3. 1.3. Pull brake lines -2-  out of the bores and close off immediately  using suitable stoppers.
    4. 1.4. Lay brake lines aside carefully  , fixing them in place if necessary.

    Information 

    • When fitting the hydraulic connections, the electric plug connections on the control units must remain connected as long as possible. This prevents the plug connections on the hydraulic unit or in the connectors inside from being splashed with brake fluid or water. 
    • Any damp connector must be wiped dry before being disconnected from the connector on the hydraulic unit. If necessary, provide the connector with a suitable protector. 
    • Brake fluid on electrical contacts (even thinned brake fluid) leads to corrosion and may cause faults in the system. 
    • The brake lines must not be bent in the area of the hydraulic unit. 
    • Clean the interfacing points of the brake lines, but not with cleaning agents. 
    • Rinse off any brake fluid emerging thoroughly with water. 
  2. Detach supply lines -1-  ().
    Fig 3: Identifying Supply Lines
    G09807937Courtesy of PORSCHE CARS NORTH AMERICA, INC.
    1. 2.1. Mark one of the two supply lines -1-  to prevent them from being confused.
    2. 2.2. Place a suitable cloth underneath to catch any emerging brake fluid.
    3. 2.3. Unscrew cap screws -2-  .
    4. 2.4. Pull supply lines -1-  out of the bores and close off immediately with suitable stoppers.
    5. 2.5. Lay supply lines aside carefully  , fixing them in place if necessary.
  3. Undo fastening screws -3-  .
  4. Undo front part of the right wheel housing liner and bend aside slightly until the lower fastening screw -3-  for the hydraulic unit is accessible.
  5. Disconnect electric push-on connector (accessible from the wheel housing).
    Fig 4: Disconnecting Electric Push-On Connector
    G09807938Courtesy of PORSCHE CARS NORTH AMERICA, INC.
    1. 5.1. Press clip -1-  downwards.
    2. 5.2. Push lever -2-  upwards.
    3. 5.3. Remove electric push-on connector.
  6. Unscrew fastening screw -3-  .
  7. Remove hydraulic unit through engine compartment.
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