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 LS 430FACTORY OEM SERVICE PROCEDURE
Torque Specification
WARNING: This page is about a different car, the 2005 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.
1GF-FE:
TORQUE SPECIFICATION - 1GF-FE
| Part Tightened | N.m | kgf.cm | ft.lbf |
|---|---|---|---|
| Exhaust pipe assy front x Exhaust manifold | 62 | 630 | 46 |
| Exhaust front pipe assy No. 2 x Exhaust pipe assy center Bolt | 48 | 490 | 35 |
| Exhaust front pipe assy No. 2 x Exhaust pipe assy center Nut | 62 | 630 | 46 |
| Exhaust pipe assy center x Tail pipe | 48 | 490 | 35 |
| Heated oxygen sensor x Exhaust pipe assy front | 44 | 450 | 33 |
| Heated oxygen sensor x Exhaust front pipe assy No. 2 | 44 | 450 | 33 |
2UZ-FE:
TORQUE SPECIFICATION - 2UZ-FE
| Part Tightened | N.m | kgf.cm | ft.lbf |
|---|---|---|---|
| Front exhaust pipe x Exhaust manifold | 62 | 633 | 46 |
| Front exhaust pipe x Center exhaust pipe Bolt | 48 | 489 | 35 |
| Front exhaust pipe x Center exhaust pipe Nut | 62 | 633 | 46 |
| Center exhaust pipe x Tail pipe | 48 | 489 | 35 |
| Heated oxygen sensor x Front exhaust pipe | 44 | 450 | 30 |
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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