Hi, would like to ask about BMW Z4. What would the potential issues be like. Currently driving a 525 and had already sent the car to workshop for oil leak. Otherwise, not much of an issue. However, the car has not reached the last 2-1 years so major issue still not sure yet. Would like to change to a 2 seater convertible. Perhaps, more experienced BMW owners can advise, as I had heard lots of horror experience regarding BMW when it became 8-9years old. Thank you