Issues i've had with my 2009
1. dct lag .. 3 software updates and about a year later it was resolved
2. gas cap replaced under warranty due to faulty seal
3. oil cap replaced under warranty due to faulty seal (still did not fix it).. leaked oil at high rpms
4. brake light malfunction... bulbs come loose over time (non LCI tails).. there was a TSB on it but it had not solved it..
5. iDrive complete failure.. happened about 2x a month. I think the main unit was overheating but BMW could never replicate
6. Battery dead after 3.5-4 years
7. Seat belt extenders do not hold seatbelt anymore with age.. useless feature anyways IMHO
Issues i've had with my 2013
none so far.. I did notice they redesigned the gas cap and oil cap however
