Bosch DQ381 - SH725xx

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Errors

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Further Information on Bosch DQ381 - SH725xx

About the Control Unit

The Bosch DQ381 is a sophisticated Transmission Control Unit (TCU) designed for the Volkswagen Group's 7-speed wet-clutch Direct-Shift Gearbox (DSG). It is an evolution of the DQ250 and is typically found in higher-torque transverse engine applications, supporting both front-wheel and all-wheel-drive (4MOTION/Quattro) models. Its advanced control strategies enable fast, smooth gear changes and contribute significantly to vehicle performance and efficiency.

Common Car Models

Volkswagen Golf (Mk7/8 R, GTI)
Volkswagen Arteon
Volkswagen Tiguan
Audi S3 (8V/8Y)
Audi Q3
SEAT Leon Cupra
Skoda Superb

Technical Concepts Explained

TCU (Transmission Control Unit): An electronic module that controls the automatic transmission. It reads data from various sensors on the vehicle and uses this information to calculate the optimal time and manner to change gears for performance, fuel economy, and shift quality.
DSG (Direct-Shift Gearbox): A type of dual-clutch automated manual transmission. It uses two separate clutches for odd and even gear sets, allowing the next gear to be pre-selected for extremely fast and seamless gear changes, combining the efficiency of a manual with the convenience of an automatic.
Wet Clutch: A type of clutch that is bathed in cooling oil or fluid. This design, used in the DQ381, allows it to handle higher torque loads and dissipate heat more effectively than a dry clutch system, making it suitable for high-performance applications.