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Home >> Mazda >> 2021 >> CX-30 Turbo Premium >> Repair and Diagnosis >> External Pages >> Different car >> Section 97 (Conventional Brake System) >> Brake Fluid Air Bleeding (Us)

Brake Fluid Air Bleeding (Us)

WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.

Oil and Chemical Type 

Brake fluid type
Type: SAE J1703 or FMVSS116 DOT-3
CAUTION:
  • 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.
  • Do not empty the brake fluid in the rear brake caliper. Otherwise, the DSC HU/CM could be damaged.
  • A new rear brake caliper has been plugged sealing off the brake fluid. For this reason, remove the plug of the rear brake caliper directly before installing the rear brake caliper to the vehicle. Other than for this, do not remove the plug of the rear brake caliper.
  • When disconnecting the brake hose from the rear brake caliper, always plug and seal the rear brake caliper so that brake fluid does not leak.
NOTE:
  • Keep the fluid level in the brake fluid reserve tank at 3/4 full or more during the air bleeding.
  • Bleed the air from the brake caliper that is the nearest to the master cylinder.
Brake fluid type
SAE J1703 or FMVSS116 DOT-3
  1. Switch the ignition ON (engine off).
  2. Release the electric parking brake.
  3. Switch the ignition OFF while pressing the electric parking brake switch.
  4. Remove the cap from the brake fluid reserved tank and add brake fluid.
  5. Remove the bleeder cap on the brake caliper, and attach a vinyl tube to the bleeder screw.
  6. Place the other end of the vinyl tube in a clear container and fill the container with fluid during air bleeding.
    NOTE:
    • Air bleeding from the brake pipe can be implemented quickly by slowly depressing the brake pedal.
  7. Working with two people, one should pump the brake pedal strongly and quickly several times, and then depress and hold the pedal down.
    G11426883Courtesy of MAZDA MOTORS CORP.
  8. While the brake pedal is depressed, the other should loosen the bleeder screw using a commercially available flare nut wrench, drain out any fluid containing air bubbles, and tighten the bleeder screw.
    Fig 1: Bleeder Screw With Torque Specification
    G13558260Courtesy of MAZDA MOTORS CORP.
  9. Repeat Steps  7 and  8 until no air bubbles are seen.
  10. Perform air bleeding as described in the above procedures for all brake calipers.
    NOTE:
    • If the air bleed from the left/right rear calipers is insufficient, air bleeding can implemented quickly by operating/releasing the electric parking brake several times while performing the work in Steps  7 and  8.
  11. Clean the brake calipers.
  12. After air bleeding, inspect the following:
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