I have a 2009 Volvo S40. I need to replace a part, but I am have a damn hard time understanding what it is called or finding a part number. It is a plastic piece (two pieces actually) that run between the front right wheel well and the back along the bottom of the car. See pics.



What is this part called?

 

The rocker molding? #24

 

I took mine off so when I took it to the Garage, they could "Easily Do the Undercoating" along with the Wheel Well Guards.

I took the screws off the {End CAP in the Rear} and the Bottom of the Wheel Well Guards. Along with the Plastic Screws - along the bottom of the Rocker Panels.
I couldn't figure out how to take the Plastic Rocker Panel Cover off, so, I kept sliding it - from Right to Left - Until it Popped Out of the "Locking Clips", which I didn't know were Under the Rubber Sealing Strip (which can be lifted up, and Slipped Off the Panel)-
I broke a couple of Clips, in the Rocker Panels- which I tried to Remove~!

I can't say that I like the way they sit after I reinstalled them - I Plan to take some measures to Re-Secure and Re-Align them!

Good Luck!