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 Infiniti M45FACTORY OEM SERVICE PROCEDURE
Testing Condition
- Vehicle driven distance: More than 5,000 km (3,017 miles).
- Barometric pressure: 14.25-15.12 psi (98.3-104.3 kPa).
- Atmospheric temperature: 68-86°F (20-30°C).
- Engine coolant temperature: 167-203°F (75-95°C).
- Transmission warmed-up. After the engine is warmed up to normal operating temperature, drive vehicle until "FLUID TEMP SE" (A/T fluid temperature sensor signal) indicates more than 140°F (60°C).
- Electrical load not applied. Rear window defogger switch, air conditioner switch, lighting switch are "OFF". Steering wheel is straight ahead.
- Engine at idle.
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.