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
Visual inspection
WARNING: This page is about a different car, the 2016 Mazda CX-3. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
- When replacing the CMP sensor, make sure there is no foreign matter on it such as metal shavings. If it is installed with foreign matter, the sensor output signal will malfunction resulting from fluctuation in magnetic flux and cause a deterioration in engine control.
- Disconnect the negative battery cable. (Refer to NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION .)
- Remove the plug hole plate. (Refer to PLUG HOLE PLATE REMOVAL/INSTALLATION .)
- Remove the intake manifold. (Refer to INTAKE-AIR SYSTEM REMOVAL/INSTALLATION .)
- Disconnect the intake CMP sensor connector.
- Remove the intake CMP sensor. (Refer to CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION .)
- Verify that there are no metal shavings on the intake CMP sensor.
- If there is a malfunction, remove any metal shavings that are adhering.
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.