Could be a spare.
I had a set of BMS units on my E92 which I'm sure where just re-branded eBay ones.
They Lasted about 2 years before throwing up warnings and going duff. I think in my case it was something inside the LED unit that went pop but I did see others reporting ballasts failing so the manufacturer may be giving spares.
All units I have seen come with a very similar setup. The H8 stalk with 2/4 cree LEDs and a ballast in a small black tube. The LED stalk is plugged into the ballast with a small white connector and the ballast plugs into the lights power connection from the car.
I had a set of BMS units on my E92 which I'm sure where just re-branded eBay ones.
They Lasted about 2 years before throwing up warnings and going duff. I think in my case it was something inside the LED unit that went pop but I did see others reporting ballasts failing so the manufacturer may be giving spares.
All units I have seen come with a very similar setup. The H8 stalk with 2/4 cree LEDs and a ballast in a small black tube. The LED stalk is plugged into the ballast with a small white connector and the ballast plugs into the lights power connection from the car.

