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.
2004 Mazda B2300 Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Engine Coolant Temperature Sensor Removal/Installation
- Disconnect negative battery cable.
- Partially drain the cooling system. See ENGINE COOLANT REPLACEMENT - 3.0L for 3.0L or see ENGINE COOLANT REPLACEMENT - 4.0L for 4.0L.
- Disconnect engine coolant temperature (ECT) sensor connector.NOTE:
- The 2.3L engine has a CHT sensor. See CYLINDER HEAD TEMPERATURE (CHT) SENSOR REMOVAL/INSTALLATION - 2.3L .
- Remove the ECT sensor.
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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