Comment by thyristan

The report from the original article is not a general problem rate but more specific: TÜV does mandatory technical inspections every two years. In those inspections, only safety- and environment-critical problems are checked for, so e.g. brakes, rust on structural parts, high emissions, non-working lights. But there is a whole bunch of stuff that they don't check for, e.g. heating/cooling, GPS not working, doesn't charge/start sometimes, ...

So it's quite possible that both are true: Maybe ID4 has lots of non-safety and non-environment problems, so it is in the shop very often, but still rarely fails an official inspection.