Genuine OEM Audi Mechatronic Unit, part number 02E325025AQZ8B. This mechatronic unit is the control center for the automatic transmission, managing hydraulic pressure and electronic signals to ensure smooth gear shifts and optimal performance. It is located within the transmission assembly. This unit features a Z8B color code. Genuine OEM mechatronic units are essential for maintaining the precise calibration and electronic integrity required for the complex functions of modern automatic transmissions, ensuring long-term reliability and proper operation.