How to Replace Ambient Air Temp Sensor 97-06 BMW 325Xi
Difficulty: Intermediate · About 45 min · Bmw 325xi
Replace the outside air temperature sensor on a 1997–2006 BMW 325Xi by removing the wheel-well liner section, exchanging the sensor, and checking the vehicle display.
Tools you will need
- Socket Extensions
- Torque Wrench
- 17mm Socket
- Wire Butt Connectors
- 8mm Socket
- Ratchet
- Wire Cutters
- 1/2 Inch Breaker Bar
Parts and supplies
- Outside air temperature sensor
- Sensor connector pigtail, if damaged
Steps
Raise the vehicle and remove the wheel
Park on level ground and loosen the wheel bolts slightly. Raise and support the vehicle at approved points, then remove the wheel to access the lower corner of the wheel well.
Remove the lower wheel-well panel
Remove the four 8 mm screws at the panel's lower corner and the two lower fasteners. Pull the panel away to expose the outside-temperature sensor and its connector.
Disconnect and remove the sensor
Unplug the sensor harness and twist the sensor to release it from the panel. Inspect the connector and wiring for corrosion or damage; repair a damaged connector with a compatible pigtail and sealed butt connectors.
Install the replacement sensor
Twist the replacement sensor into the lower panel until it locks, then connect its electrical plug. Reinstall the panel screws and verify the harness is routed away from the tire and steering components.
Reinstall the wheel and check the display
Mount the wheel and start the lug bolts by hand. Lower the vehicle and tighten the bolts in a star pattern to the vehicle's specification. Check that the outside-temperature display updates normally after driving.
Check your vehicle’s repair manual for exact specifications and fit.