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.
2003 Mazda Tribute 2WD L4-2.0LFACTORY OEM SERVICE PROCEDURE
Catalyst Monitor Sensor
CATALYST MONITOR SENSOR
Removal and Installation
1. Disconnect the catalyst monitor sensor electrical connector.
2. Raise and support the vehicle. Refer to LIFTING.
NOTE: If necessary, lubricate the catalyst monitor sensor with Penetrating and Lock Lubricant to aid in removal.
3. Using the special tool, remove the catalyst monitor sensor.
NOTE: Apply a light coat of High Temperature Nickel Anti-Seize Lubricant to the threads of the catalyst monitor sensor to aid in installation.
4. To install, reverse the removal procedure.
Removal and Installation
1. Disconnect the catalyst monitor sensor electrical connector.
2. Raise and support the vehicle. Refer to LIFTING.
NOTE: If necessary, lubricate the catalyst monitor sensor with Penetrating and Lock Lubricant to aid in removal.
3. Using the special tool, remove the catalyst monitor sensor.
NOTE: Apply a light coat of High Temperature Nickel Anti-Seize Lubricant to the threads of the catalyst monitor sensor to aid in installation.
4. To install, reverse the removal procedure.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.