Description
This BMW AUC air quality sensor is a genuine OEM component for BMW vehicles equipped with automatic climate control and automatic air recirculation. Primary OEM number 64118391470. It is designed to measure the level of harmful gases such as exhaust fumes and nitrogen oxides in the air that enters the cabin through the ventilation system.
Its job is to send a signal to the climate control module so the system can close the fresh air flap and switch to recirculation mode when the outside air is polluted, for example in heavy traffic, tunnels or behind a diesel truck. The sensor is a small electronic unit mounted in the fresh air intake path. A properly working air quality sensor supports cleaner cabin air, less odor and correct operation of the automatic air recirculation function.
Common signs of a faulty unit include the recirculation function never switching on automatically, the recirculation function staying on all the time, unpleasant odors entering the cabin, fogging windows because fresh air is blocked, or climate control fault messages stored in the module. When the sensor sends a wrong or missing signal, the climate system may stay in the wrong air mode and reduce comfort and visibility.
This is a used original part, removed from a vehicle and tested before sale. Match the exact OEM number 64118391470 before ordering. Compatibility depends on the vehicle equipment, so compare the number with your original sensor. Professional installation is recommended, and fault code clearing or adaptation of the climate control module may be needed where applicable.
Returns accepted only for genuine faults — faulty on arrival, not as described, or wrong part supplied — requested within 14 days, with all 3 anti-tamper stickers intact. No returns for change of mind, incorrect installation, coding/programming, or buyer compatibility errors; checking compatibility (OEM number, firmware, vehicle) is the buyer’s responsibility. Full policy: https://giantparts.eu/refund-and-returns/
