I bought mine 2011 135i DCT N55 a year ago, now my car has 57k mileage.
Recently did MHD flash on my car but all the problems/repairs finished prior to fully stock car except the Performance Exhaust. I will not list any routine/scheduled maintenances since they are required no matter what kind of car you are driven.
Here's the things:
- Passenger side Adaptive Headlight Module failure.
- Evaporator leaking in AC system.
- Found leaks under DCT fluid pan due to O-ring and fluid pan gasket/seal. Did the fluid change @ the same time to save labor, the dealer claims that they will reuse the old transmission fluid and put them in after repair which I will have to pay $200 if I want fresh DCT fluid. Such an environmentally friendly company
- Oil Filter Housing Gasket leaking
- High Pressure Fuel Pump failure and Rail pressure sensor failure
The good thing is that most repairs were covered by CPO except for the Adaptive Headlight Module which cost me about $700. My car will be ready for another 50k mileage.