KT200 Plus DQ381 0GC TCU Guide: OBD Bench Backup and Safe Writing

DQ381 is a seven-speed wet-clutch DSG transmission used across several Volkswagen Group MQB vehicles. The transmission is commonly associated with the 0GC designation, but technicians may encounter different part numbers, software versions, bootloader generations and protection states.

This guide explains how to identify a DQ381 TCU, distinguish it from