I want your faulty electronics
I fitted a starter button in my BMW and thought it was amazing.
There is something about pressing a better to start a car over turning the key. I disabled the ability to the turn the key to start it, which seemed like a good anti theft idea at the time but the amount of phone calls I had from garages that worked on the car phoning me wondering how to start or assuming it was broken got annoying. Granted it was not very obvious.
If you want it, like it do it.