The Trunkovs are modeled after the ZAZ-968 Zaporozhets, a car model from Soviet Ukraine, which means that there was a Soviet revolution in the cars history and by extension so existed the works of Car-le Marx and Vladimir Lemon.
Anyway, were all sick at the house and were just binging kids movies. Cars 2 is so weird. I thought the first 15 minutes were going to reveal to be some in universe movie the cars were watching. Then it just kept going...
Except they are also owners of the world's largest oil field. They are so rich they have themselves towed everywhere. They could just use their wealth to have their parts remanufactured, couldn't they?
Who stopped creating their parts? They imply that someone stopped making them. Its like the writers forgot that this world has zero humans and its all cars.
Also global warming... A central hinge of the plot.
With a little tweaking they could have made it something like the movie Robots, where the megacorp that produces the repair parts that everyone needs to survive decides to stop producing them in favor of more lucrative upgrades.
Mater could have been our working class hero instead he was recruited to work as a spook for the empire.