How do you replace the AUC sensor in BMW 525i?

To replace the AUC (Air Quality) sensor in a BMW 525i, first locate the sensor, typically found in the cabin air filter housing or near the front of the vehicle. Disconnect the battery to ensure safety, then remove the necessary panels or covers to access the sensor. Unplug the old sensor and install the new one, reconnecting it securely. Finally, reassemble any removed components and reconnect the battery before testing the system.