It might be nice in the near future ( don't think this kind of system will be implemented at launch ), something like a system that causes the main components of the vehicle to wear out over time.
eg:
Engine:
< 100.000 kilometers = GOOD
< 150.000 kilometers = NORMAL
> 200.000 kilometers = BAD -> Vehicle performance decreases ( acceleration / max speed )
ACTIONS: Change engine
Battery:
< 1 month of life = GOOD
< 2 months of life = NORMAL
> 3 months of life = BAD -> Starting the vehicle requires several attempts
ACTION: Change battery
Turbine:
< 150.000 kilometers = GOOD
< 200.000 kilometers = NORMAL
> 250.000 kilometers = BAD -> Vehicle performance decreases ( max speed )
ACTION: Change turbine
Tires:
< 10.000 kilometers = GOOD
< 15.000 kilometers = NORMAL
> 20.000 kilometers = BAD -> Vehicle handling deteriorates
ACTIONS: Change tires