I bought a used white 2012 ES 350 that has a non-standard rectangular body trim piece between the rear door and the rear wheel well. Can anyone help me identify the name and part number of this piece, please? I've looked through several parts diagrams but I've never seen it listed. Mine appears to be discolored. Thanks!

 

I think this is it
https://www.ebay.com/itm/284392392865

 

Yes, that's it. Thanks so much! Looks like it's also known as a Wheel Arch Molding. Thanks again.

 

For future reference to this thread, the part is a Rear Quarter Panel Protector aka Wheel Arch Molding.

Right-hand side: 58747-33050
Left-hand side: 58748-33050

 

The parts came in. They're just clear transparent stickers. I chose to remove the old, discolored and cracked ones and not put the new stickers on. To get the old stickers off, I found that a plastic scraper and generous amounts of WD-40 got them off and didn't scratch the paint. I'm not seeing any color differences between the paint formerly under the stickers and the surrounding paint. My car is white.

 

I was about to say that’s the clear bra-Ish material sticker that they use. Yours must of not adhered well and water/dirt got in there. Love that color especially with those wheels, very clean looking.