They definitely all have them installed.
If you don't have functional turning signals you can signal with arm gestures out the window instead and in that circumstance should not get a ticket -- or even be stopped -- for nonfunctional electronic signals, at least anywhere in the USA.
BMWs show up about 30% of the time in my notepad (in absolute numbers, not adjusted for how many BMWs are on the road here in the UK (5%)).
I would be shocked if BMWs (and Vauxhalls/Opel) aren't massively overrepresented in accident statistics here in the UK.
Also, not REALLY it's just a thing people say, but when you get cut off by a BMW that doesn't use it's turn signal it is not a surprise.
When I returned to my car, there was a note on my windshield to practice parking, which seemed like a diplomatic carefully chosen word
They hadn't seen why I had to park that way, but I feel like people expect a prick uncollaborative driver of BMWs, as opposed to the benefit of the doubt given to other cars (or simply not seeing a pattern with other models)
I’ve driven many cars and have gotten the most assumptions or odd treatment while using BMWs.
Its like right below driving a flashy sports car and having ppl follow you or want to race.