ive owned 2 new from the factory gmc trucks. by 100,000 miles the whole front of the engine was wearing out, new alts, water pumps, idlers, a/c compressors, power steering pumps, clutch fans went bad 3 times, on one truck, so i went with electric fans in the end.
and ive seen other cars start to need parts replaced by 100,000 miles. these parts are all spinning full time, so by 100,000 miles, you'd be worn out as well lol
and thats when most new car warranty's end, so yeah 100,00 sounds about right. coincidence? i think not.....