Re: motors from two French automakers
To a reasonable approximation* cars are only stolen for parts, these days. The value of the parts may be less than the value of the whole car at normal market prices, but it's almost impossible to sell or export a stolen car, whereas parts are far less strictly controlled/tracked.
*There are exceptions, but they're rare. Joyriders, I guess. Apparently criminals don't steal cars to use in other crimes, these days, because they're more likely to get caught than just buying a cheap car with fake ID.