I don't think mileage has anything to do with it. Its about heat cycles. I have barely 33K miles on my 2008 335i and I've just replaced my first coil.
I've also replaced 2 injectors, but they were old part numbers...
Equal Opportunity Harasser!
6MT | COBB | AR | AE | Forge DV | HPF | P3 Gauge | Hybrid Intake | O.S.Giken TCD | All M3 bits | TCKLine | StopTech | UUC | ER | SPEC