IS 250 RWD V6-2.5L (4GR-FSE) (2007)
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Oxygen Sensor: Service and Repair
Air Fuel Ratio Sensor (For Sensor 1)
REMOVAL
1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
CAUTION: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt
pretensioner deployment.
2. REMOVE COOL AIR INTAKE DUCT SEAL
3. REMOVE ENGINE ROOM SIDE COVER LH
4. REMOVE ENGINE ROOM COVER SIDE RH
5. REMOVE REAR NO. 1 FLOOR PANEL BRACE
6. REMOVE FRONT CENTER FLOOR BRACE
7. REMOVE HEATED OXYGEN SENSOR (for 2WD)
8. REMOVE HEATED OXYGEN SENSOR (for 4WD)
9. REMOVE FRONT EXHAUST PIPE ASSEMBLY
10. REMOVE BATTERY
11. REMOVE POWER STEERING ECU ASSEMBLY
12. REMOVE BATTERY TRAY
a. Remove the 2 bolts and battery tray.
13. REMOVE NO. 1 RELAY BLOCK COVER
14. REMOVE NO. 4 ENGINE WIRE
15. REMOVE ENGINE ROOM RELAY BLOCK ASSEMBLY
a. Remove the 2 bolts, nut and engine room relay block assembly.
16. REMOVE EXHAUST MANIFOLD SUB-ASSEMBLY LH
a. Disconnect the air fuel ratio sensor connector.
b. Remove the 6 nuts and exhaust manifold subassembly LH and gasket.
17. REMOVE AIR FUEL RATIO SENSOR (for Bank 1 Sensor 1)
a. Disconnect the sensor connector.
