95% (my guestimate from professional experience) of car failures nowadays are electronic failures of some kind; electronics which are not fitted to aero engines primarily because (AIUI) of the certification cost/unit sales ratio and the lack of a requirement to meet specific emmision & economy targets.
That said, I wonder how long car engines would last if you were made to change the oil & filter every 50hrs?
In addition, modern cars are, by law, required to be made of mostly recyclable materials. Materials which unfortunately are not durable.
We can, therefore, quite legitimately blame it on the tree huggers next time our (modern) car breaks down!
An old Mercedes on the other hand, will go on and on and on with proper maintenace.