M6 Auc 4s0101 May 2026

: To prevent the build-up of CO2 and humidity inside the car, the system is programmed with a timer. For instance, at external temperatures above 6°C, the system may recirculate air for four minutes before briefly opening for one minute to refresh the cabin air. Part Identification and Compatibility

The "AUC" acronym stands for Automatische Umluft Control (Automatic Recirculation Control). In modern BMW M6 models, this sensor acts as a gateway for the IHKA (Integrated Automatic Heating and Air Conditioning) system. M6 Auc 4s0101

: If the sensor fails in a way that keeps the car permanently in recirculation mode, excess moisture can cause the windows to fog up. Installation in the BMW M6 : To prevent the build-up of CO2 and

: The sensor monitors for specific harmful substances in the exhaust of nearby vehicles, primarily hydrocarbons (HC) and carbon monoxide (CO) . In modern BMW M6 models, this sensor acts

: If you smell diesel or gasoline fumes inside your BMW M6 even when the AC is on, the sensor has likely failed.

: A faulty sensor can trigger "AUC Sensor" error codes when scanned with BMW diagnostic tools like ISTA or INPA.