FullThrottle e46 said:
Yep top light. Is it easy to check that sender? Would it have come up as a fault and show on the BMW OBD reader/tool/apparatus/thingy? The guy did a scan I'm pretty sure. We're picking up the car in a few hrs so I'll hear it all straight from the horses mouth. Talk soon.
Its likely a on/off sensor, two wire, it would be easy to check, and it might not show up on a scanner