How many milesshould the 4 wh disc brakes last with the OEM brakes?

 

welcome to the forum, depends on how hard you drive your car, normal coditions 35k-45k, I have heard some go to 60k. If in doubt, jack the car up and remove your wheel and look physically. Also if you start to hear a high pitch squeeling, the tattle tale metal is telling you time to change.( not a grinding sound ) Fronts ware faster than the rear.