It's good that I bought my car in Portugal then.
Portuguese law - heavily influenced by
DIRECTIVE 1999/44/EC OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL - states this:
1. Consummer goods have a 24 month guarantee
2. This applies both to the car as a whole (from sale date) and for any parts sold to be fitted to it (from their own sale dates)
3. These periods of time are suspended while the "good" is waiting for repair.
Granted, all these apply to the seller (my dealer), but the seller has a right of redress agianst the producer, if he uses it or chooses not to do it is beyond me.
But, in my case, this is important. It means that:
a) All the many periods I had with my M3W "parked" waiting for exhausts (rough estimate ... 6 months) suspended the 24 month warranty period;
b) All the parts fitted into the car since I bought it have their 2 year warranty set from the date they were fitted.
c) The most important parts replaced so far are the new exhaust header and the new rear (steel) sprocket, both fitted a few months ago, so their warranty period will last until early 2018
d) The most important parts in my car's history are the exhausts, and for those the 2-year warranty period hasn't even started yet, the car is currently parked and waiting for new parts.