2021 Mazda 3 BaseFACTORY OEM SERVICE PROCEDURE

Vehicle Front Side

G13715220Courtesy of MAZDA MOTORS CORP.
PART DESCRIPTION

1 DSC HU/Control Module (See DSC HU/Control Module REMOVAL/INSTALLATION [L.H.D. (US)] .)
(See DSC RELATED PARTS SENSOR INITIALIZATION PROCEDURE [(US)] .)
(See DSC HU/Control Module INSPECTION .)
2 Brake fluid pressure sensor (built-into DSC HU/Control Module) (See BRAKE FLUID PRESSURE SENSOR INSPECTION [(US)] .)
(See DSC RELATED PARTS SENSOR INITIALIZATION PROCEDURE [(US)] .)
3 Front ABS wheel-speed sensor (See FRONT ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION .)
(See FRONT ABS WHEEL-SPEED SENSOR INSPECTION .)
4 DSC OFF switch (See DSC OFF SWITCH REMOVAL/INSTALLATION .)
(See DSC OFF SWITCH INSPECTION .)
5 AUTO HOLD switch (See AUTO HOLD SWITCH REMOVAL/INSTALLATION .)
(See AUTO HOLD SWITCH INSPECTION .)
Factory Service Tools

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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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