When a car owner can drive weeks or months at a time without any repairs being necessary that is the time to save for the inevitable... repairs necessary in the near future! A budget is the best way to do this, a certain amount of money put aside each payday or monthly.
Some people consider maintenance to be a repair. It isn't. Money needs to be budgeted for maintenance, also. Worn tires, brakes, wiper blades, and oil changes aren't repairs! They are maintenance items and go with any car, new, used, leased, stolen, etcetera.
If one has a car payment then money budgeted for repairs and maintenance are in addition to those payments, of course.
When the final car payment is made, the amount of money that was required for payments should be put into savings, so when the "big one" (a repair that is too costly on a car that has little value left) happens, one has money for another vehicle.
Sound too expensive? You bet! Cars are expensive to own/operate.