: Often produced by HELLA (OEM) or directly as a genuine BMW part.
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
Over time, the chemical sensing element inside the AUC sensor becomes "poisoned" or worn out, losing its ability to distinguish between clean air and exhaust fumes. : Often produced by HELLA (OEM) or directly