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 CX-3 AWDFACTORY OEM SERVICE PROCEDURE
Relay Location
RELAY AND FUSE BLOCK RELAY IDENTIFICATION
| Relay Number | RELAY DESCRIPTION |
|---|---|
| 1 | IG1 Relay |
| 2 | A/C Relay |
| 3 | Front Fog Light Relay |
| 4 | Theft Deterrent Relay |
| 5 | Brake Light Relay |
| 6 | Horn Relay |
| 7 | Wiper Int Relay |
| 8 | Wiper Hi Relay |
| 9 | Steering Warmer Relay |
| 10 | Starter Relay |
| 11 | Electric Variable Valve Timing Relay |
| 12 | ACC Relay |
| 13 | Rear Window Defogger Relay |
| 14 | Blower Relay |
| 15 | Fuel Pump Relay |
| 16 | Fuel Injector Relay (Without Coolant Control Valve) Sub Relay (With Coolant Control Valve) |
| 17 | Main Relay |
| 18 | Cooling Fan Relay |
Factory Service Tools
Use the Manual With the Right Hardware
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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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