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 Lexus RX 300 AWDFACTORY OEM SERVICE PROCEDURE
Circuit Protection Devices
CIRCUIT PROTECTION DEVICES LOCATION
| Component | Component Location |
|---|---|
| Engine Room J/B | On left side of engine compartment. See Figure. |
| Fusible Link Block | In engine room J/B. See Figure. |
| Instrument Panel J/B | Behind left side of dash. See Figure. |
| J/B No. 3 | Behind upper center of dash. See Figure. |
| J/B No. 5 | Behind upper left side of dash. See Figure. |
| R/B No. 1 | Behind left side of dash. See Figure. |
| R/B No. 2 | In engine room J/B. See Figure. |
| R/B No. 3 | On front center of engine compartment, on radiator support. See Figure. |
| R/B No. 4 | On right side of engine compartment. |
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.