How to Remove Ambient Air Temp Sensor 97-05 Lexus GS300

Difficulty: Intermediate · About 50 min · Lexus Gs300

Replace the ambient air-temperature sensor on a 1997–2005 Lexus GS300 by removing the front bumper cover and transferring the sensor connector.

Steps

1. Remove the bumper cover

   Protect the painted edges and remove the lower fasteners and corner splash shields. Disconnect fog and side-marker lamps if equipped, remove the upper retainers, and support the cover as it comes free.

2. Remove the faulty sensor

   With the bumper safely supported, disconnect the sensor plug and release the sensor from its frame clip. Keep the harness routed away from sharp edges and moving components.

3. Install the replacement sensor

   Connect the replacement sensor and press its retaining clip into the frame until secure. Route the wiring as originally installed and reconnect any lamp plugs that were moved.

4. Reinstall the bumper

   Align the cover with its mounting points and install the upper fasteners first. Refit the corner retainers and lower shield screws, ensuring the lamp wiring is not pinched.

5. Verify the repair

   Switch on the vehicle and allow the outside-temperature display to update. Check the bumper fit and confirm all lamps and connectors disturbed during access work correctly.

Check your vehicle’s repair manual for exact specifications and fit.