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
Except Engine Compartment (Without Coolant Control Valve)
COMPONENT DESCRIPTION
| 1 | Fuel tank pressure sensor (U.S.A. and CANADA) (See FUEL TANK PRESSURE SENSOR REMOVAL/INSTALLATION .) (See FUEL TANK PRESSURE SENSOR INSPECTION .) |
| 2 | Clutch stroke sensor (MTX) (lf equipped) (See CLUTCH STROKE SENSOR INSPECTION .) |
| 3 | CPP switch (MIX) (See CLUTCH PEDAL POSITION (CPP) SWITCH INSPECTION .) |
| 4 | APP sensor (See ACCELERATOR PEDAL POSITION (APP) SENSOR REMOVAL/INSTALLATION .) (See ACCELERATOR PEDAL POSITION (APP) SENSOR INSPECTION .) |
| 5 | A/F sensor (See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION .) (See AIR FUEL RATIO (A/F) SENSOR INSPECTION .) |
| 6 | Oil pressure switch (See OIL PRESSURE SWITCH INSPECTION .) |
| 7 | CKP sensor (See CRANKSHAFT POSITION (CKP) SENSOR REMOVAL/INSTALLATION .) (See CRANKSHAFT POSITION (CKP) SENSOR INSPECTION .) |
| 8 | HO2S (See HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION .) (See HEATED OXYGEN SENSOR (HO2S) INSPECTION .) |
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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