[firstdown]

As others have said but most car need the belts changed more often that 100k. Just take a look at them and if they have any cracks replace them. Rotors do wear out and can usually be turned once then need replacing. They get hot and cool down thuse the warp and turning will shave out the warp but it also makes it thinner and will warp quicker the next time. THe biggest thing you can do is change the oil every 3 to 5,000 miles, trans. usually around 70 to 80,000 )look to manual) and top of fluids as needed. I check my cars once a month.