That's what I always hear but being a BMW fan myself I have not experienced that myself on the vehicles I've owned. I have had two E46 M3's, one with lower miles and one with higher miles and never had any issue with either. The higher mileage one was also tracked by the previous owner and myself quite a bit. I also owned an E90 M3 for some time and never had a single issue with that either. All three were bought used and did not have warranty. Maybe I'm just lucky in the models that I've had but I would guess people who actually have issues with the M models would be lower than it actually seems. The few are just very vocal. I've also owned a B5.5 A4 and B6 S4 of similar miles and both had a few handful of problems. Just important to buy something that wasn't beaten to death and if you care for it and do regular maintenance as recommended there shouldn't be too much reason to stress.Man that's a good looking car! Agreed on the E90. Honestly I'm very comfortable with the e36 and previous BMWs, but anything newer and I feel like it would be worth the payments to buy a new car and have it under warranty, rather than buy a 5-10 year old M3 and have to deal with maintenance issues.