Mr Robert
Kraftwagen König
I doubt very much that "they're just sweeping it under the carpet".
I don't know. I have personal experience of only one major issue and BMW AG treated that in a less than satisfying way. IU'm talking about the chain tensioner issue with the PSA-engines. BMW never came clear admiting they screwed up, selling a product with an inherit design flaw*. The only response the owners got was "this is natural". Yeah, it is natural for a faulty design to behave like that, but that is not the point, now is it.
Well, I have my doubts regarding BMW in this case. This is an issues that will not effect the use of the car for a long time (i.e. not a problem for the first owner, if said owner is not Giannis) and will therefore be a problem in the second och third, maybe fourth leg. "Not a problem for BMW". Furthermore, the cost for fixing this issues would be horrifying to any beanie - every seat in every 1 and 3-series cars will have to be exchanged (as that is porobably cheaper than taking them apart for a respray of the skeleton).
I'd say the odds are on BMW to dodge this and blame the customer.
*) Using a hydraulic chain tensioner together with a weak oil pump and very long lines for that pump to fill before the tensioner is fully operational and, voila, cold start knocks that get worse over time - viable solutions would be to have every engine converted to mechanical/spring chain tensioners... imagine the price of that.