Mini Cooper AUC Sensor Fault and Blower Motor Issue

Sounds like you're having a classic AUC sensor issue. The fact that your blower motor isn't working is a pretty strong indicator, as the system sometimes shuts down the blower to protect you from recirculating bad air if the sensor detects something nasty. Since you've already scanned it and got the sensor fault, that reinforces the diagnosis. The sensor itself is responsible for detecting pollutants, and it controls the auto recirculation feature. Have you had a look at the wiring and connector to the sensor? That's the first thing I'd check. A defective cable or plug connection would definitely throw that fault code and cause the symptoms you're seeing. Think of it like a loose wire on a light bulb - no connection, no light. Where is the BMW AUC sensor located on your Mini Cooper? Knowing that will help me guide you to inspect it.

Thanks for the quick reply! I'm not the most mechanically inclined, to be honest. Where exactly is the AUC sensor located? And what should I be looking for when I check the wiring and connector? Is it something obvious, like a broken wire, or more subtle?

Okay, so you're looking for the cabin air sensor, which on your Mini is usually located in the engine compartment, near the air intake for the cabin ventilation system. It's often tucked away near the windshield washer fluid reservoir or under the cowl panel. As for what to look for: yes, obvious breaks in the wires are a good start, but also check for corrosion on the connector pins. Sometimes, moisture gets in there and causes a build-up that prevents a good connection. Also, make sure the connector is fully seated. If you're not comfortable poking around, and especially if you're seeing corrosion, it might be worth taking it to a workshop. They can test the sensor itself and properly clean or replace the connector. It's a pretty quick job, and if it's just a bad connection, the repair cost should be minimal, around 95€. Much cheaper than replacing the whole sensor unnecessarily.

Just wanted to close the loop on this AUC sensor fault thing. You nailed it - took it to the workshop and they found a corroded connector on the sensor. They cleaned it up, reconnected it, and now the blower motor works and the auto recirculation is back! Bill came to 95€, so not too bad. Thanks for pointing me in the right direction!