Need to replace the exterior chrome trim piece on the rear as it's beginning to peal and looks ooogly.

What's the part ID # for this strip of chrome?

 

Go to parts.com and find the P/N.

 

About as easy as it gets. Buy the proper plastic chrome strip on eBay or similar. Carefully dig out the old trim with a thin scraper or knife (try along a side that goes into the bumper near the wheel well. Measure it. Add 2" and cut the new piece. Install by pushing the strip into the receiving end on the side of the bumper cover near wheel well. Push in place as you pull adhesive backing off of new strip and gently force into crevice from original strip. (Using a wallpaper roller worked for me). Work strip around to the other side. As you get to end try to make sure you have an inch of new strip to be tucked into the edge near wheel well again. When finished, go around and check your work to ensure strip is properly seated around the entire bumper cover.