[akkando]

Found this on the floor in the back. Looks like some random part that broke off of something? Don't see any place it could have come from though.

Maybe it's just something that came out of someone's pocket and isn't something from inside the car?

[joec1101]

Looks like maybe a plastic cover that goes on the seat rail (?)

I found on the back seat floor a similar looking piece in my E93 a few years back and that's what it was, so maybe....

[silverado]

Originally Posted by joec1101

Looks like maybe a plastic cover that goes on the seat rail (?)

I found on the back seat floor a similar looking piece in my E93 a few years back and that's what it was, so maybe....

You are correct. These often fall off in BMWs.

[Artemis]

Oh, that's merely the 'top speed key' lifting M2 limited top speed from 250 km/h to 350 km/h.