Originally Posted by JARblue

Yup. In fact, I remove them every time I wash the car since it's so easy. There are two tabs that pinch outward to hold the side markers in place.

Being careful not to scratch the paint, slip your fingernail under the marker at the point closest to the front of the car. Push the side marker sideways towards the back of the car. This should release the tab, allowing the front edge of the side marker to pop out where your finger was located. It should pop out either on its own or with just a little leverage using your finger. When I unplug the harness, I just let it fall back into the fender, so I often have to use a tool to fetch it when reinstalling the markers after a wash.