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 MPV ESFACTORY OEM SERVICE PROCEDURE
Engine Coolant Temperature Sensor
NOTE:
On B3000, B4000 and Tribute 3.0L, Engine Coolant Temperature (ECT) sensor specifications are the same as Intake Air Temperature (IAT) sensor specifications. See INTAKE AIR TEMPERATURE (IAT) SENSOR SPECIFICATIONS (B2300, B3000, B4000 & TRIBUTE)
table.
ENGINE COOLANT TEMPERATURE (ECT) SENSOR RESISTANCE (EXCEPT B2300, B3000, B4000 & TRIBUTE)
| Temperature °F (°C) | Ohms | ||||
|---|---|---|---|---|---|
| Mazda6 | |||||
| 2.3L | |||||
| 68 (20) | 35,480-39,200 | ||||
| 158 (70) | 5070-5600 | ||||
| 176 (80) | 3650-4020 | ||||
| 3.0L | |||||
| 68 (20) | 2200-2800 | ||||
| 176 (80) | 290-400 | ||||
| Miata (1) | |||||
| 68 (20) | 2270-2740 | ||||
| 176 (80) | 290-340 | ||||
| Protege | |||||
| 68 (20) | 2200-2600 | ||||
| 176 (80) | 290-340 | ||||
| MPV | |||||
| 68 (20) | 2200-2800 | ||||
| 176 (80) | 290-400 | ||||
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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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