Valve will be providing Steam Controller replacement parts via iFixit after launch
via pcgamer.com
Short excerpt below. Read at the original source.
One of the many impressive features of Valve’s new Steam Controller is just how straightforward the pad is when it comes to repairability. It’s so easy to open up and get to the insides. That’s great and all, but where are you going to get the necessary parts to make any repairs down the line? […]