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 IS 300 Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Electrical Component Locator: Grounds
GROUNDS LOCATION
| Component | Component Location |
|---|---|
| BJ | At left front floor panel. See Figure. |
| BK | At right front floor panel. See Figure. |
| BL | At left rear quarterpanel. See Figure. |
| BM (Wagon) | At left upper side of back panel. |
| BN (Wagon) | At right upper side of back panel. |
| EA | At front of intake manifold. See Figure. |
| EB | At center left side of intake manifold. See Figure. |
| EC | At left fender apron. See Figure. |
| ID | At left side of firewall. See Figure. |
| IE | At left front floor panel center. See Figure. |
| IF | At right front panel center. See Figure. |
| IG | At right dash reinforcement. See Figure. |
| IH | At right side of firewall. See Figure. |
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.