The RS4 lower door trims are known to warp over time due to the metal inside them corroding. Or the metal pegs onto which they slide and fix onto corroding.
This can cause unsightly warping. They are getting rarer to buy new so I thought I’d take mine off and clean them up. Thankfully mine are not warped.
The lower door trims are simple to remove by a Philips screw on each end on the inside of the door. Once unscrewed the door trim is slid backwards, along the door. This disengages it from the several mounting points welded to the doorskin. Then it simply pulls off. Do not pull at the trim without first sliding it backwards off the mounting points.
On my car there was some dirt behind there but I’ve heard of cars being caked in dirt. So give it a good clean.
I found my mounting points were starting to rust. So I put rust remover on them. Then I sanded them. Then I painted them with hammerite.


Painted over

I then put resilient grease into the plastic mounting point so that when I slide them back on the grease will cover the metal pegs


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