How TUV knows about repair costs? They don't do any repairs themselves and you can have a TUV failure even because your tires need a change! Let's get a bit serious here ... ok?
Don't you like RepairPal? Check another study by WhatCar. It was based on the Warranty Direct's company data.
https://www.dailymail.co.uk/news/art...ity-table.html
https://en.wikipedia.org/wiki/Warranty_Direct