FixVault

Power Brake Unit Removal/Installation: Notes

WARNING: This page is about a different car, the 2020 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
  • Once the brake switch clearance has automatically been adjusted, it cannot be adjusted again. Therefore, replace the switch with a new one when replacing the power brake unit or performing any procedure that changes the brake pedal stroke.
  1. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
  2. Remove the master cylinder. (See MASTER CYLINDER REMOVAL/INSTALLATION .)
  3. Remove the brake pipe from the clip.
    G11273811Courtesy of MAZDA MOTORS CORP.
  4. Remove in the order indicated in the table.
  5. Install in the reverse order of removal.
  6. After installation, add brake fluid, bleed the air, and inspect for fluid leakage. (See BRAKE FLUID AIR BLEEDING .)
  7. Remove the brake switch. (See BRAKE PEDAL REMOVAL/INSTALLATION .)
  8. Inspect the brake pedal. (See BRAKE PEDAL INSPECTION .)
  9. Install a new brake switch. (See BRAKE PEDAL REMOVAL/INSTALLATION .)
    Fig 1: Power Brake Unit Components With Torque Specification
    G13488995Courtesy of MAZDA MOTORS CORP.
    COMPONENT DESCRIPTION

    1 Power brake unit vacuum sensor connector
    2 Vacuum hose, clamp
    (See VACUUM HOSE REMOVAL/INSTALLATION .)
    3 Snap pin
    (See Snap Pin Installation Note .)
    4 Clevis pin
    5 Nut
    6 Power brake unit
    7 Gasket