That kit doesn’t make any permanent changes to the electrical system, and the cable latch is easy to access and holds up to regular use. I had warranty-covered electrical work done with the kit still in the car, so it wasn’t a problem. But dealers make the final call on whether a mod affects the warranty.
@Will
I had a nail in my tire. The sensor showed low pressure, so I kept refilling it for two days. Then I took it to the dealer, and they plugged it. No issues since.