I haven't had any issues with the 2014 M3W (yet). Just 6 months and a little over 3000 miles. However it doesn't stop me feeling slightly anxious when driving it.
I realise this in two ways:
The first is the total relaxation I have in my old 4/4. The second is, for example, the other day I was driving through a village and there was a rhythmic metallic hammering from the roof of a house. It took me a few seconds for my brain to accept that the taps were not from the car and a harbinger of some new sort of failure.
I emphasise that so far I have had no issues at all. The only excess noise has been occasionally from the rear belt/pulley.
Have fun it's a hoot.
