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.

2009 Lexus IS FFACTORY OEM SERVICE PROCEDURE

Heated Oxygen Sensor: Removal: Removal

REMOVE FRONT DOOR SCUFF PLATE LH . Refer to REMOVAL - Step 37
REMOVE FRONT DOOR OPENING TRIM COVER LH . Refer to REMOVAL - Step 39
REMOVE FRONT DOOR SCUFF PLATE RH . Refer to REMOVAL - Step 30
REMOVE FRONT DOOR OPENING TRIM COVER RH . Refer to REMOVAL - Step 31
REMOVE FRONT FLOOR FOOTREST LH . Refer to REMOVAL - Step 3
REMOVE HEATED OXYGEN SENSOR (for Bank 1 Sensor 2)
1. Remove the front floor silencer pad LH.
2. Disconnect the heated oxygen sensor connector.
  
  Fig 1: Locating Heated Oxygen Sensor Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Remove the grommet.
  
  Fig 2: Removing Heated Oxygen Sensor From Front Exhaust Pipe Assembly
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Using SST, remove the heated oxygen sensor from the front exhaust pipe assembly.
  - SST: 09224-00010
REMOVE HEATED OXYGEN SENSOR (for Bank 2 Sensor 2)
1. Remove the front floor silencer pad RH.
2. Disconnect the heated oxygen sensor connector.
  
  Fig 3: Locating Heated Oxygen Sensor Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Remove the grommet.
  
  Fig 4: Removing Heated Oxygen Sensor From Front Exhaust Pipe Assembly
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Using SST, remove the heated oxygen sensor from the front exhaust pipe assembly.
  - SST: 09224-00010

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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