Sienna AWD V6-3.5L (2GR-FE) (2007)
Oxygen Sensor: Service and Repair
Air Fuel Ratio Sensor (For 4WD)
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 activation.
2. REMOVE AIR FUEL RATIO SENSOR (for Bank 2 Sensor 1)
a. Disconnect the sensor connector.
b. Using SST, remove the sensor from the exhaust manifold.
SST 09224-00010
3. REMOVE CENTER EXHAUST PIPE ASSEMBLY
a. Disconnect the heated oxygen sensor (for Bank 1 Sensor 2) connector under the center console.
b. Remove the clip as shown in the illustration.
c. Remove the 2 bolts and 2 compression springs.