That's likely a deficiency of your VW diesel. VW never properly designed them correctly, and that includes not meeting emissions. Other car engines likely won't have that many issues.

Once you deal with the eventuality of a dead battery, it will easily trump all repair costs of ICE cars. People are just pretending it won't happen to them.

Also, an FCEV is an electric car too, and doesn't have that many mechanical parts either. It also lacks a giant battery. Basic engineering suggests it will be the cheapest type of car of all to maintain once they hit critical mass.