You don't need extra parts, these are no headlights, but an IoT modem that already has power saving fearures on chip. It just needs an ignition signal and programming to go to sleep when it's not there.
You must have had very crappy cars, because I rented a 2022 Renault Clio this spring and it had very good ergonomics. I was quite amazed. Only an older Hyunday i3 that I know of had annoying electrical quirks. But hey, there are tiktok videos on how to steal current Hyundai and Kia cars.
https://www.theverge.com/23742425/kia-boys-car-theft-steal-t...
