As you can already guess from its name, your bumper assembly's brackets are designed to hold your bumper against your car's frame, chassis, or body. Without this bracket, your bumper will sag, or worse, break off completely from your vehicle. In the event of a low-speed front- or rear-end collision, your bumper shields the rest of your vehicle from damage by receiving the brunt of the impact. Normally, after a light collision, all you'll have to deal with is a fixable dent or two. But if the slightest contact causes your bumper to sag, then you've got a bad Bumper Bracket in your ride. The only solution to this type of problem is to replace damaged bumper brackets as soon as possible.