Hopefully You Will Never Has To Use This Feature

Here's What Those Little Shapes On Car Bumpers Are For

That little plastic square hides a weld-nut, which is part of the bumper beam. The purpose of that weld nut is to provide a provision for a tow eye. Here’s a look at that weld nut in the bumper beam:

The tow eye cover simply pops out with a push of the finger:

 (Jalopnik.com)