2021 Mazda 3 BaseFACTORY OEM SERVICE PROCEDURE

Rear Abs Wheel-Speed Sensor Removal/Installation: Notes

  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. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .)
  5. For the Sedan-4SD, remove the following parts:
    1. Trunk covering (See TRUNK COVERING REMOVAL/INSTALLATION .)
    2. Trunk board (See TRUNK BOARD REMOVAL/INSTALLATION (US) .)
    3. Trunk end trim (See TRUNK END TRIM REMOVAL/INSTALLATION .)
  6. For the Hatchback-5HB, remove the following parts:
    1. Trunk covering (See TRUNK COVERING REMOVAL/INSTALLATION .)
    2. Trunk board (See TRUNK BOARD REMOVAL/INSTALLATION (US) .)
    3. Trunk end trim (See TRUNK END TRIM REMOVAL/INSTALLATION .)
    4. Trunk side upper trim (See TRUNK SIDE UPPER TRIM REMOVAL/INSTALLATION .)
  7. Partially peel back the trunk side trim to a position where the rear ABS wheel speed sensor connector can be disconnected. (See TRUNK SIDE TRIM REMOVAL/INSTALLATION (US) .)
    G13176295Courtesy of MAZDA MOTORS CORP.
  8. For the Hatchback-5HB or Sedan-4SD (RH), remove the trunk side insulator. (See TRUNK SIDE INSULATOR REMOVAL/INSTALLATION .)
  9. Remove the clip from the body.
    G13176296Courtesy of MAZDA MOTORS CORP.
  10. Disconnect the rear ABS wheel-speed sensor connector.
  11. Press the grommet tabs in the direction of arrows (1) shown in the figure and detach them from the vehicle body.
    G13176297Courtesy of MAZDA MOTORS CORP.
  12. Press the grommet in the direction of arrow (2) shown in the figure and press out the rear ABS wheel-speed sensor toward the outside of the vehicle.
  13. Remove the wheel and tire. (See WHEEL AND TIRE REMOVAL/INSTALLATION .)
  14. Remove in the order indicated in the table.
  15. Install in the reverse order of removal.
  16. After installation, verify that there is no twisting in the rear ABS wheel-speed sensor.
Fig 1: Rear ABS Wheel-Speed Sensor Components With Torque Specification
G13715232Courtesy of MAZDA MOTORS CORP.
PART DESCRIPTION

1 Electric parking brake motor gear unit connector (See ELECTRIC PARKING BRAKE MOTOR GEAR UNIT REMOVAL/INSTALLATION .)
2 Bolt
3 Bolt
4 Bolt
5 Rear ABS wheel-speed sensor (See REAR ABS WHEEL-SPEED SENSOR REMOVAL NOTE .)
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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