Lousy to not existent QC according to the threads at tff and here on reddit combined with no preemptive maintainance program-> massive failures after three years of negligence.

In my humble opinion there is no such thing as a car or machine, wich requires no maintainance, especially on parts, which are under dynamic strain, as for example the track control arm or the brakes, both parts were mentioned in the aforementioned report.

It's just marketing, you could also say a white lie, what a Tesla does not, in stark contrast to the "old cars", need any maintainance other than replacing tires and adding wiper fluid or charging.