BMW have had huge issues, drive shaft failure (now given almost a lifetime warranty), engine casing & final drive corrosion, (many changed under warranty) but they still know the RSU will fail and outside of warranty you struggle to get "good will". And FYI even if you take extended warranty the RSU isn't covered if you have done more than 30K miles. But... they often do listen and if the dealer is on side with you you stand a good chance of stuff getting sorted. All manufacturers have issues, even Rolls Royce have a warranty department.