I just had a dealer visit for a hard starting issue (all they diagnosed was weak battery and dirty plugs) and 45 minutes into my drive home my airbag, ABS, traction control lights come on AND the speedometer/odometer stop working.
The next morning I replaced my plugs and battery (which I registered with the Foxwell scan tool).
Took it out for a 90 minute highway drive with no warning lights showing, speedometer working properly and 50 miles in, same thing happens. ABS, traction control, airbag, no speedometer and seat belt light on as well.
Any idea what could be causing these lights to come on? Airbag and seatbelt seem unrelated to the other 3 lights, but there is no issue with engine performance or driving except for having to guess how fast I'm going.
2013 Cooper with N16 engine, manual transmission.