First post!!! I bought my '19 SR5 a few weeks ago and did my first mod today at 528 miles.
This was 100% a safety/mobility modification - I've done it on 4 other vehicles over the years, but this was my first Toyota. I have a disability in my arms that limits my reach. My hands are also smaller than average, and the stock wheel is large and cumbersome. I used the same setup in my Forester XT for 100k mi with zero issues. Being my first Toyota, I was slightly apprehensive about this mod. I haven't come across another 5th gen with an aftermarket steering wheel. I did a TON of research into fitment and any potential electrical issues, and, alas, there were no conflicts or ill-fitting parts. With some steering adapter hubs, there aren't provisions for the clockspring, which requires the driver to manually turn off the blinkers. This hub works with the clockspring, so the blinkers operate normally, and there are zero warning lights.
I can do a detailed write-up, if it's useful to anyone, but I doubt this will be a popular mod among the 4Runner crowd, mostly because of the airbag issue.
For now, these are the parts I used:
* Works Bell Adapter Hub: Model 540S. Comes with several harnesses with spade connectors, two resistors and fasteners. The adapter hub, resisters and horn wiring harness were 100% plug-and-play. I lost cruise control and the other buttons, but I'll figure that stuff out later. There are various kits to mount the cruise control stalk, mostly from the GT86/FRS/BRZ world.
* NRG Quick Release
* Works Bell 1" Spacer
* Nardi Deep Corn Steering Wheel