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
Idle Speed & Ignition Timing
Ensure idle speed and ignition timing are set to specification. For adjustment procedures, see ON-VEHICLE ADJUSTMENTS article.
IDLE SPEED & CO LEVEL
| Application | Idle RPM (1) | ||
|---|---|---|---|
| FX35, FX45 & G35 | 650-700 | ||
| I35 & M45 | 675-725 | ||
| QX4 | 750-800 | ||
| Q45 | 600-700 | ||
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IGNITION TIMING (Degrees BTDC @ Idle)
| Application | (1) Specification | ||
|---|---|---|---|
| FX35, G35, I35 & QX4 | 15-20° BTDC | ||
| FX45, M45 | 12-17° BTDC | ||
| Q45 | 12-22° BTDC | ||
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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.