Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2021 Mazda 3 BaseFACTORY OEM SERVICE PROCEDURE
DSC HU/Control Module REMOVAL/INSTALLATION [L.H.D. (US)]: Notes
Oil and Chemical Type
| Brake fluid type |
| Type: SAE J1703 or FMVSS116 DOT-3 |
CAUTION:
- When replacing the DSC HU/Control Module, perform the configuration to assure that the system operates correctly. (See CONFIGURATION .)
- The internal parts of the DSC HU/Control Module could be damaged if dropped. Be careful not to drop the DSC HU/Control Module. Replace the DSC HU/Control Module if it is subjected to an impact.
- 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.
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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