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 Toyota Sienna LE, FWDFACTORY OEM SERVICE PROCEDURE
Service Data
IGNITION SYSTEM SERVICE DATA SPECIFICATIONS
| Spark Plug | - |
|---|---|
| Recommended Spark Plug DENSO Made | SK20R11 |
| Recommended Spark Plug NGK Made | IFR6A11 |
| Electrode Gap Correct Electrode Gap For New Spark Plug | 1.0-1.1 mm (0.039 - 0.043 in.) |
| Electrode Gap Maximum Electrode Gap For Used Spark Plug | 1.3 mm (0.051 in.) |
| VVT Sensor | |
| Resistance Cold | 835 to 1,400 ohm |
| Resistance Hot | 1,060- 1,645 ohm |
| Crankshaft Position Sensor | |
| Resistance Cold | 1,630 - 2,740 ohm |
| Resistance Hot | 2,065 - 3,225 ohm |
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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