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This ambient temperature sensor measures outside air temperature for the climate control system on Audi A4 B5 models from 1994–2001. Mounted at the front of the vehicle, it reads conditions to optimize heating and cooling. The unit shows general wear and soiling. Match the OEM codes 4A0820539 or 740220173F against your original sensor before ordering to ensure proper fitment.
This ambient temperature sensor measures outside air temperature for the climate control system on Audi A4 B5 models from 1994–2001. Mounted at the front of the vehicle, it reads conditions to optimize heating and cooling. The unit shows general wear and soiling. Match the OEM codes 4A0820539 or 740220173F against your original sensor before ordering to ensure proper fitment.
