The Finnish transport and communications agency publishes yearly statistics about inspected cars and their three most common reasons for failing inspection as well as the percentage of failed inspections by car year and model.[1] The graphs on the site itself aren't that interesting but the provided excel sheets have some neat insight especially on the slightly older cars.

In Finland it is required by law for all cars older than 4 years to be inspected yearly or every two years (depending on the age of the car) so the statistics include quite large selection of different car models.

[1]: https://tieto.traficom.fi/en/statistics/statistics-inspectio...