Welcome to FR.
French cars are not in the US for good reason. I doubt if their reliability is any better now than it was.
I own a VW diesel (TDI) that I have modded so it is now reliable and I do not need to take it into the dealership to fix what are basic engineering flaws in the design. If the Germans have sunk that low, I can only imagine what the French product would look like.
I have been looking at the TDI for at least three years, what mods have you made, if I may ask. The most visible problem for me is the seat, but that is another story.