Owned one for the past 7 years & the reason I have kept it so long is I could not think what to replace it with!
My experience has been great however a couple of common issues worth pointing out
rear calipers can seize causing pads to drag. Means new pistons and rebuild.
The rust issues mentioned are mainly front wings where inner arch liner rubs and is covered under a 12 year paint warranty providing they are original paint
The optional 18″ monza 2 alloys looks loads better compared to the 17’s however they are diamond cut face one small chips can lead to terrible white corrosion. These wheels cost a packet to refurb ( had mine done)
Early cars had diverter valves which split – should be ok on 2007+
rear 3rd brake light in the rear spoiler fails and the numpties designed it so you either remove the spoiler (it’s tiger sealed on so need to use a cheesewire!) to unbolt it or you have to smash it out from the outside
My solid black (rare) 3 door with rare electric sunroof, satnav, dual climate control and heated cloth seats will be up for sale soon. Decided to go for an M135i. I would like a silver 3 door one with black leather which seems to be impossible as all the ones I have found have red leather…eughh