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.
2017 Lexus GS 450h BaseFACTORY OEM SERVICE PROCEDURE
Air/Fuel Ratio Sensor: Remove & Replace
FUEL INJECTION - ELECTRONIC, GAS
| Applies To | Note | Standard Hours | Warranty Hours | Skill Level |
|---|---|---|---|---|
| Upstream Oxygen Sensor,Bank 1,Right | Includes: Disable and Enable High Voltage System. Includes: R&I Inverter and Converter Assembly. Includes: R&I Exhaust Manifold. | 4.7 | 3.7 | B |
| Upstream Oxygen Sensor,Bank 2,Left | Includes: R&I Exhaust Manifold. | 2.7 | B | |
| Upstream Oxygen Sensor,Both Banks | Includes: Disable and Enable High Voltage System. Includes: R&I Inverter and Converter Assembly. Includes: R&I Exhaust Manifold. | 6.0 | 4.4 | B |
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.