Detailed instructions for replacing the armrest with a new armrest liner.

See    • Acura TSX Door Panel Removal | CU2 | ...   for instructions on how to remove the door panel. Note that this linked video does not show details how to unplug the many connections. You will need to do this to free up the door and gain access to the screws holding the armrest to the panel.

I purchased my replacement liner from Amazon:
Search on: "labwork Leather Door Panel Insert Cards Cover Synthetic Padded Door Panel Insert Cards Fit for Acura TSX 20092014"
OR use this link:
https://www.amazon.com/gp/product/B08...