[elaus]

TÜV is the mandatory inspection that every car in Germany has to go through. Failing that inspection means you _have_ to fix the issues or may no longer drive that car on public roads.

So while it would be nice to get more detailled stats, I think this is still really helpful. For me the TÜV report was a very important source for my decission on which models (and to a lesser degree manufacturers) I should avoid.

[kiney]

There are more accredited inspection providers besides TüV in germany like Dekra etc. This matters because TüV does NOT have data for all cars and there might be self selection effects because drivers can choose where to do the inspection (many get it done by whatever provider their car dealer has a deal with, which might differ greatly by car brand)

[thyristan]

TÜV is the largest such organisation in Germany and almost has a monopoly. The inspections themselves are colloquially even called "TÜV", even if you do it at some other org.

However, as others have written, there is still some huge bias in those numbers. Especially German brand car shops provide an inspection service, where they pre-check and repair the car before the official inspection. Many of those German brands are also very big on company leasing, to the point where almost nobody buys a new BMW, Mercedes or Audi privately, they either get a new one as a company car via company leasing, or they get a used leasing return car. All those leasing cars always have the aforementioned inspection service as part of the leasing package. So those numbers are to be taken with a huge huge grain of salt.