LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Mazda >> 2024 >> CX-90 Turbo Select >> Repair and Diagnosis >> External Pages >> Different car >> Section 14 (Conventional Brake System) >> Power Brake Unit Removal/Installation >> Notes
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Power Brake Unit Removal/Installation: Notes

WARNING: This page is about a different car, the 2024 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.

Replacement Part 

Gasket
Quantity: 1
Location of use: Power brake unit		 Brake switch
Quantity: 1
Location of use: Brake pedal

Oil and Chemical Type 

Brake fluid type
Type: SAE J1703 or FMVSS116 DOT-3
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.
  • Brake fluid will damage painted surfaces. Be careful not to spill any on painted surfaces. In addition, if there is any brake fluid on the wiring harness, the wire insulation may corrode causing a malfunction such as a short circuit. If brake fluid gets on a painted surface or wiring harness, wash and flush it off completely with water immediately.
NOTE:
  • Tighten the brake pipe flare nut using any commercially available flare nut wrench.
  1. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
  2. Remove the following parts as a single unit. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION (VIN M) .) (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION (VIN Y) .)
    • Air hose
    • Air cleaner cover
    • Air cleaner element
    • Air cleaner case
    • Fresh-air duct
    • Resonance chamber (Except VIN Y)
  3. Remove the battery. (See BATTERY REMOVAL/INSTALLATION (VIN M) .) (See BATTERY REMOVAL/INSTALLATION (VIN Y) .)
  4. Remove the battery tray. (VIN Y) (See BATTERY REMOVAL/INSTALLATION (VIN Y) .)
  5. Remove the air inlet pipe. (VIN Y) (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION (VIN Y) .)
  6. Remove the battery tray and PCM component. (Except VIN Y) (See BATTERY REMOVAL/INSTALLATION (VIN M) .)
  7. Set the PCM wiring harness out of the way. (Except VIN Y)
  8. Remove the following parts:
    1. Windshield wiper arm and blade (See WINDSHIELD WIPER ARM AND BLADE REMOVAL/INSTALLATION .)
    2. Cowl grille (See COWL GRILLE REMOVAL/INSTALLATION .)
    3. Windshield wiper motor and link (See WINDSHIELD WIPER MOTOR AND LINK REMOVAL/INSTALLATION .)
    4. Side cowl grille (See COWL GRILLE REMOVAL/INSTALLATION .)
    5. Cowl panel (See COWL PANEL REMOVAL/INSTALLATION .)
  9. Remove the master cylinder. (See MASTER CYLINDER REMOVAL/INSTALLATION .)
  10. Remove the fuel hose holder from the body.
    G16374260Courtesy of MAZDA MOTORS CORP.
  11. Remove in the order indicated in the table.
  12. Install in the reverse order of removal.
  13. After installation, add brake fluid, bleed the air, and inspect for fluid leakage. (See BRAKE FLUID AIR BLEEDING .)
  14. Remove the brake switch. (See BRAKE PEDAL REMOVAL/INSTALLATION .)
  15. Inspect the brake pedal. (See BRAKE PEDAL INSPECTION .)
  16. Install a new brake switch. (See BRAKE PEDAL REMOVAL/INSTALLATION .)
Fig 1: Power Brake Unit Components Location With Torque Specification
G16374261Courtesy of MAZDA MOTORS CORP.
POWER BRAKE UNIT COMPONENT OPERATION

Component no Refer to
1 Vacuum hose
(See VACUUM HOSE REMOVAL/INSTALLATION (VIN M) .)
(See VACUUM HOSE REMOVAL/INSTALLATION (VIN Y) .)
2 Snap pin
(See BRAKE PEDAL REMOVAL/INSTALLATION .)
3 Clevis pin
4 Nut
5 Power brake unit
6 Gasket
7 Fork
(See FORK INSTALLATION NOTE .)
8 Locknut
scientia non olet · About LEMON Manuals