It is called a relay, and if you give them the frame number and the Vag reference of the piece, they find it safe, it is called what is called.
EJ 4A0 210 168, this would be a vag reference for Audi
Ex 3B1 198 799 Volkswagen
012 466 398 is a mixed reference, (the reference is very likely to be of this type) because it is a piece used by Volkswagen Audi Seat and Skoda.
Look for the number in the relay or give it as it shows that of spare parts to look for it.
All the best.