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.
2008 Lexus IS FFACTORY OEM SERVICE PROCEDURE
Air Fuel Ratio Sensor: Installation
- INSTALL AIR FUEL RATIO SENSOR (for Bank 1 Sensor 1)
- Using SST, install the air fuel ratio sensor to the exhaust manifold LH
SST 09224-00010
Torque: without SST
44 N*m (449 kgf*cm, 32 ft.*lbf)
with SST
40 N*m (408 kgf*cm, 30 ft.*lbf)
- Using SST, install the air fuel ratio sensor to the exhaust manifold LH
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.