If you purchase a cat d car in the normal warrant period that has been repaired

 Will the dealer repair the vehicle in the future if it develops and warranty issues

You would have to ask the Warranty Provider and explain what the reason for it being damaged and what that was, body or mechanics, interior / electrics.

 

Do you mean in the Manufacturers Warranty of 3 years in the UK, or an Extended Warranty / Used Car warranty.

Purchased from who, some private seller / dealer or Main Dealer?

 

 

The reason for being a Cat D would make a difference. 

Then the parts used to repair being Genuine Parts, and what these are.