Hi, I have contacted both Audi & VW UK to ask about warranties with repaired cars, and so long as the cars are repaired using genuine parts, the warranty will not be affected. I also had to send a 2016 Audi Q3 in for some warranty work, the engineer that worked on the car couldn't believe that it had been a front end write off as I ensure everything is put back exactly as it came out the factory.
I tried Bollingtons and they gave a good quote, but in the end I found a really good deal with Adelphi Insurance brokers, Luke was super helpful. £1500 fully comp with £20k indemnity and all the bells & whistles.
I'm beginning to think the Cat N's when repaired correctly are great for keeping customers happy, as an example I sold a 2017 Audi Q3 S-line with only 3k miles on it that was fully loaded to a customer, he was over the moon because if he had bought a non category car for the same money he'd be looking at a car 3 years older with no Audi warranty and much higher mileage. So long as they are 100% repaired correctly, they are going to be as good as new.