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Home >> VinFast >> 2023 >> VF9 Plus >> Repair and Diagnosis >> Brakes >> Traction Control >> Antilock Brake System >> Repair Procedures >> Electronic Brake Master And Boost Assembly (E-Boost) Removal And Installation/Replacement

Electronic Brake Master And Boost Assembly (E-Boost) Removal And Installation/Replacement

Mobile Repair Possible:  No

WARNING: Electricity hazard 
Failure to follow specified procedures may result in death or serious injury from electric shock when working on or near high-voltage components.
  • Only authorised and appropriately trained persons may carry out work on high-voltage vehicles and components.
  • Perform High Voltage isolation procedure prior to commencing work
  • Ensure appropriate Personal Protective Equipment is worn until the system is verified safe
WARNING: Brake fluid is corrosive and toxic! 
Death or serious injury possible if brake fluid is swallowed
  • Avoid swallowing or inhaling
  • Avoid direct contact.
  • Observe specific instructions on danger sheet.
  • Always use personal protective equipment (PPE).
NOTE: Damage due to leaked brake fluid. 
Brake fluid is corrosive and can cause damage to electrical components, electrical cables and wiring as well as to plastic components and painted surfaces.
  • Protect vehicle parts and components to avoid contact with brake fluid.
  • Mask off painted surfaces in an appropriate way to prevent damage to the paintwork.
  • Use rags and suitable containers to prevent that leaking brake fluid comes into contact with vehicle parts.
  • If brake fluid comes into contact with plastic components or painted surfaces flush the area immediately with water.

Removal Procedure: 

  1. Disconnect the 12V battery negative terminal. Refer to 12V BATTERY NEGATIVE CABLE DISCONNECTION/CONNECTION
  2. Remove shock tower brace. Refer to SHOCK TOWER BRACE REMOVAL AND INSTALLATION/REPLACEMENT
  3. Remove instrument panel under tray (driver). Refer to INSTRUMENT PANEL UNDER TRAY REMOVAL AND INSTALLATION/REPLACEMENT (DRIVER)
    G16030806Courtesy of VINFAST, LLC
  4. Press (1) and move the latch (2) in the direction of the arrow to unlock and disconnect the electrical connector (3).
    G16030807Courtesy of VINFAST, LLC
  5. Remove the cap (1) and suck out the brake fluid in the reservoir using a suitable extraction tool.
  6. Loosen clamp (2) and remove the hose from the IDB. Close hose with a suitable plug.
    NOTE: Environmental Risk 
    • Collect and dispose of leaking liquids.
    • Observe country-specific disposal regulations.
    G16030808Courtesy of VINFAST, LLC
  7. Disconnect the front and rear brake pipes (1) from the IDB.

    Torque: 16 Nm 

    NOTE: Environmental Risk 
    • Collect and dispose of leaking liquids.
    • Observe country-specific disposal regulations.
    G16030809Courtesy of VINFAST, LLC

    Removal note: For better illustration the removal for the brake pipes is shown with the harness removed. 

  8. Guide out the brake pipes (1) from the IDB (2).
    NOTE: Environmental Risk 
    • Collect and dispose of leaking liquids.
    • Observe country-specific disposal regulations.
    G16030810Courtesy of VINFAST, LLC
  9. Release securing clip (1) and remove bolt to brake booster.
    G16030811Courtesy of VINFAST, LLC
  10. Remove 4 nuts (1)

    Torque: 20 Nm 

    G16030812Courtesy of VINFAST, LLC

    Removal note: For better illustration the removal for the IDB is shown with the harness and brake pipes removed. 

  11. Guide out the IDB (1) until the electrical connector under the IDB are accessible.
    NOTE: Environmental Risk 
    • Collect and dispose of leaking liquids.
    • Observe country-specific disposal regulations.
    G16030813Courtesy of VINFAST, LLC
  12. Unlock and disconnect the electrical connector (1).
    G16030814Courtesy of VINFAST, LLC
  13. Remove the IDB (1) in the direction of the arrow out from the vehicle.
    NOTE: Environmental Risk 
    • Collect and dispose of leaking liquids.
    • Observe country-specific disposal regulations.

Installation Procedure: 

New service part IDB's come prefilled with brake fluid to assist with bleeding. 

  1. Installation is the reverse of removal procedure, noting the following.

    All fasteners must be tightened to torque specification! 

  2. Install instrument panel under tray (driver). Refer to INSTRUMENT PANEL UNDER TRAY REMOVAL AND INSTALLATION/REPLACEMENT (DRIVER)
  3. Install shock tower brace. Refer to SHOCK TOWER BRACE REMOVAL AND INSTALLATION/REPLACEMENT
  4. Reconnect the 12V battery negative terminal. Refer to 12V BATTERY NEGATIVE CABLE DISCONNECTION/CONNECTION
  5. Fill the master cylinder reservoir with brake fluid as required. Refer to BRAKE MASTER CYLINDER RESERVOIR REMOVAL AND INSTALLATION/REPLACEMENT AND FILLING
  6. Perform the brake fluid bleed procedure. Refer to HYDRAULIC BRAKE SYSTEM BLEEDING (PRESSURE)
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