I had a tailight go out, it's new enough to be led, with a built in circuit board, so as it was extensively corroded, the whole module had to be replaced for ab

I had a tailight go out, it's new enough to be led, with a built in circuit board, so as it was extensively corroded, the whole module had to be replaced for about $200...but also lots of interior trim had to be taken apart to get access which the dealer would have charged me hundreds for. I think the 12V battery is probably not hard to physically replace, but I believe the electronics are locked to genuine batteries in some way. I was recently reminded how in the US, car headlights used to be standardized. When I was a kid, even though I was fascinated with cars, I never really noticed it. But then we gave it up, and now there's tremendous flexibility in styling, but at a large cost. It really is valuable for government to force standards on people, even if there is a tradeoff and they can overdo it.