BMW switched to the full side curtain airbags on the newer BMWs. Like even my first MY2004 X3 has the side curtain. I prefer door-mounted side impact airbags, but BMW is switching to seat mounted as well. I am disappointed that BMW is not offering the side impact airbags on the latest BMWs. I believe for rear passengers, a curtain alone is insufficient.

Safety is no concern in any BMW though, at least for me.