Rear brake pads are usually much smaller than front brake pads and this also leads to faster wear. ... Up here rear drum brakes last 200,000 miles or more but rear disc brakes typically go 30,000 to 50,000 miles. ... and the rear pads had 5mm of material remaining. Sintered/metallic pads last longer than organic pads. If you drive sedately and use brakes gently and to the minimum, they may last thousands of km, whereas if you're an aggressive/carefree driver, the pads will wear out faster. How long will 5mm rear brake pads last?. Jan 29, 2021 · There’s actually no standard answer to this question. Many car manufacturers estimate that a braking pad can last anywhere from 20,000 to 70,000 miles. However, on average, most car owners replace their brake pads after about 40,000 miles. We know what you’re thinking..