The short version
DQ200 is widely known as a lower-torque 7-speed dry-clutch DSG. DQ250 is a 6-speed wet-clutch DSG. DQ381 is a later 7-speed wet-clutch DSG used across many MQB applications, while DQ500 is a higher-capacity 7-speed wet-clutch transmission used in selected performance and commercial vehicles.
DQ2007-speed · dry clutchSelected lower-torque transverse applications
DQ2506-speed · wet clutchCommon older performance / diesel applications
DQ3817-speed · wet clutchLater MQB applications
DQ5007-speed · wet clutchHigher-torque / commercial applications
Why the distinction matters
Fluid service requirements, clutch construction, mechatronic design and repair parts differ. “A DSG service” is therefore not one universal job. Correct gearbox identification protects against the wrong fluid, wrong filter or wrong repair assumption.
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