Mini Countryman Diesel Engine Stalling Fuel Sensor Fault

A faulty fuel level sensor is a common culprit for those symptoms, especially the stalling at idle. Before condemning the sensor outright, I'd suggest checking the wiring harness leading to the fuel tank. Corrosion or a loose connection can sometimes mimic a faulty sensor reading. Have you verified the integrity of the wiring?

Thanks for the prompt response! I've given the wiring a cursory glance, but admittedly haven't probed it with a multimeter yet. Are there any specific points along the harness I should focus on, or any telltale signs of corrosion I should be particularly vigilant for? It's a rather congested area, access isn't exactly optimal.

Okay, given that you've checked the basics and are still experiencing these issues, it's highly probable the fuel level sensor itself is the problem. While DIY replacement is possible, accessing the fuel tank and sensor can be tricky and potentially dangerous. The risk of fuel spillage is significant. Considering the relatively low cost of the part, I'd personally recommend taking it to a workshop. They can properly diagnose and replace the faulty sensor, ensuring everything is sealed and functioning correctly. The error code stored will confirm that the car sensor is indeed faulty.

I'm pleased to report the issue is resolved. After checking all accessible wiring without any luck, I decided to take it to my trusted mechanic. As suspected, the fuel level sensor was indeed faulty. The replacement sensor itself, along with labor, came to approximately 52€. Considerably less than the dealership quoted! Thanks again for your insights, it helped narrow down the possibilities.