Tcu Dsg Transmission 7 Vw Tiguan Skoda Kodiaq

Typical Defects:
The vehicle is in recovery
The transmission fails to engage the gears

Error Codes:
P1735 - Transmission Box Parameter Error
P1735 - 10666 - Transmission Box Parameter Error
P173500 - Electrical Malfunction of Clutch Position Sensor 1
P1736 - 10668 - Transmission Box Parameter Error
P1736 - Transmission Box Parameter Error
P173600 - Electrical Malfunction of Clutch Position Sensor 2
P173E - Valve 1 in the transmission part 1 - electrical failure
P173F - Valve 2 in the transmission part 1 - electrical failure

The TCU control unit with OE code 0BH325025P is the mechatronic control unit of the DSG dual-clutch transmission with 7 gears with code DQ500, developed by the Volkswagen-Audi group. This control unit integrates both the electronic control module and the hydraulic block, and is responsible for the complete management of the automatic transmission, including clutch actuation, gear selection, and communication with other vehicle control units via the CAN network.

Technical characteristics

• Type of transmission: DSG 7 speed DQ500 dual-clutch in oil bath
• Structure: integrated mechatronics (electronics + hydraulics)
• Supply voltage: 12 V
• Communication: CAN interface for dialogue with ABS, engine, ESP, etc.
• Main functions: clutch actuation, gear selection, oil pressure management, integrated diagnostics
• Weight: about 6,5–7 kg
• Supply: in some versions it is sold with preloaded software and already paired to a specific VIN

The unit works in synergy with the internal transmission sensors and the engine unit to ensure smooth transitions and protection of the mechanical system.

DIPA can intervene to overhaul these modules thanks to its experience and expertise.

Functions

• Select gears via electrohydraulic actuators
• Control the opening and closing of the two DSG clutches
• Regulate the oil pressure inside the transmission
• Monitor the temperature and rotational speed of the internal shafts
• Communicate with the engine, ABS, ESP, and instrument cluster control units
• Manage the logic of gear engagement and release in automatic and manual modes
• Provide data for transmission diagnosis and maintenance

Brand and model on which the part is mounted

Volkswagen

• Tiguan

Skoda

• Kodiaq

DIPA recommends always verifying the compatibility of the spare part before purchase.

Typical faults

• The vehicle goes into recovery mode
• The transmission fails to engage gears

Error Codes

P1735 - Transmission Control Unit Parameter Error
P1735 - 10666 - Transmission Control Unit Parameter Error
P173500 - Electrical Malfunction of Clutch Position Sensor 1
P1736 - 10668 - Transmission Control Unit Parameter Error
P1736 - Transmission Control Unit Parameter Error
P173600 - Electrical Malfunction of Clutch Position Sensor 2
P173E - Valve 1 in transmission part 1 - electrical fault
P173F - Valve 2 in transmission part 1 - electrical fault

Final conclusions

The TCU OE 0BH325025P control unit represents the heart of the DSG transmission management system DQ500, adopted on mid-range and high-end vehicles of the VAG group. This module integrates electronics and hydraulics in a single unit for transmission actuation, ensuring fast and adaptive gear shifts.

DIPA offers a wide range of spare parts: from original to aftermarket ones selected among the best manufacturers on the market. Not only that: it offers reconditioned components with performance equivalent to new ones, which provide savings in replacement and contribute to environmental protection through circular economy. If the spare part you need is not available, no worries: DIPA can overhaul your part "on demand," restoring its full functionality and safety in a short time.