Genuine OEM Volkswagen Mechatronic Control Unit, part number 02E325025ASZ7S. This mechatronic unit is the electronic brain of the transmission, responsible for controlling gear selection, clutch actuation, and hydraulic pressure. It is located within the transmission assembly. This specific variant is designated with Z7S. Genuine OEM mechatronic units ensure precise calibration and reliable operation, critical for smooth and efficient transmission performance.