Booster assembly or Controller Assy is broken?

[joeyhell]

So, got a ABS warning light on my dashboard.
Took the car to Nissan and they want 3500 euros for the part.
When i got the offer for replacing the part the part number is 460074NP8B.
However they also wrote "Controller assy".
Its strange to me, if i google the part number the bosster assembly comes up.
But if i google controller assy another comes up.
Im not sure which one is right?
Maybe someone can point me in the right direction?
I dont even know what the "controller assy" does :/
https://ibb.co/cb3ZFwq

 

[Snakebitten]

I looked it up at various Nissan online parts suppliers in the US, and the same part number brought up listings with both descriptions, but the same image/part.

Booster assembly for 2014-2017 Nissan Leaf
Controller assembly for 2014-2017 Nissan Leaf

 

[GerryAZ]

Make sure 12V battery is well charged and clear all DTC's (diagnostic trouble codes) to see if that resets the warning light before replacing that expensive part. CAN Bus communication problems caused by low 12V battery voltage can cause these types of errors.