0BH, 0BT, DQ500 Direct Shift Gearbox (DSG)
0BH, 0BT, DQ500 Direct Shift Gearbox (DSG)
The Volkswagen Group 0BH and 0BT are designations of the DQ500, a heavy-duty 7-speed wet dual-clutch transmission (DSG) developed for transverse-engine vehicles with higher torque requirements. It uses two oil-cooled multi-plate clutches and an electro-hydraulic mechatronic system to control clutch operation and gear selection. The DQ500 was introduced in the Volkswagen Transporter T5, with the 0BH version subsequently used in passenger-car and performance applications. Ross-Tech specifically identifies 0BH/0BT as DQ500 7-speed DSG transmissions.
Specification: 7-speed dual-clutch transmission • DQ500 family • 0BH / 0BT designations • Wet multi-plate dual clutch • Up to approx. 600 Nm torque capacity depending on variant/application • Transverse installation • Front-wheel-drive and all-wheel-drive applications • Two transmission sections/input shafts • Electro-hydraulic mechatronic control • Integrated differential • Electronic clutch and gear selection.
Commonly fitted to higher-torque Volkswagen Group vehicles including selected VW Transporter T5/T6, Tiguan and other performance applications, together with Audi Q3, RS3 and TT RS models. The 0BT and 0BH are both DQ500-family transmissions, but individual versions, ratios, final drives, mechatronics and drivetrain configurations differ. The complete gearbox code, vehicle application and transmission/mechatronic part number should therefore always be confirmed before ordering replacement parts.
Common Faults
Common 0BH/0BT DQ500 problems include mechatronic electronic failure, clutch-position sensor faults, hydraulic pressure-control problems, solenoid/valve faults, clutch-control faults, input-speed sensor failures and gear-selector regulation faults. Typical symptoms include harsh or erratic shifting, failed or delayed Drive/Reverse engagement, gearbox malfunction warnings, transmission shudder, loss of odd or even gears and emergency/limp-home operation.
Common Fault Codes
|
Fault Code |
Description |
|
P1735 / P173500 |
Position sensor for clutch 1 – electrical fault |
|
P1736 / P173600 |
Position sensor for clutch 2 – electrical fault |
|
P0607 / P060700 |
Transmission control module – internal/performance malfunction |
|
P179C / P179C00 |
Main pressure valve – electrical fault |
|
P2716 / P271600 |
Pressure control valve 4 – electrical fault |
|
P175D / P175D00 |
Clutch 1 opens unintentionally |
|
P175E / P175E00 |
Clutch 1 closes unintentionally |
|
P176E / P176E00 |
Clutch 2 opens unintentionally |
|
P176F / P176F00 |
Clutch 2 closes unintentionally |
|
P0715 / P071500 |
Transmission input speed sensor 1 – electrical/no-function fault |
These codes are documented specifically against 0BH/0BT DQ500 mechatronic systems. P1735/P173500 and P1736/P173600 are particularly well-established faults involving the clutch-position sensing system and can result in the transmission disabling one of its two gear sets, leaving the vehicle operating with only odd or even gears
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The Volkswagen Group 0BH and 0BT are designations of the DQ500, a heavy-duty 7-speed wet dual-clutch transmission (DSG) developed for transverse-engine vehicles with higher torque requirements. It uses two oil-cooled multi-plate clutches and an electro-hydraulic mechatronic system to control clutch operation and gear selection. The DQ500 was introduced in the Volkswagen Transporter T5, with the 0BH version subsequently used in passenger-car and performance applications. Ross-Tech specifically identifies 0BH/0BT as DQ500 7-speed DSG transmissions.
Specification: 7-speed dual-clutch transmission • DQ500 family • 0BH / 0BT designations • Wet multi-plate dual clutch • Up to approx. 600 Nm torque capacity depending on variant/application • Transverse installation • Front-wheel-drive and all-wheel-drive applications • Two transmission sections/input shafts • Electro-hydraulic mechatronic control • Integrated differential • Electronic clutch and gear selection.
Commonly fitted to higher-torque Volkswagen Group vehicles including selected VW Transporter T5/T6, Tiguan and other performance applications, together with Audi Q3, RS3 and TT RS models. The 0BT and 0BH are both DQ500-family transmissions, but individual versions, ratios, final drives, mechatronics and drivetrain configurations differ. The complete gearbox code, vehicle application and transmission/mechatronic part number should therefore always be confirmed before ordering replacement parts.
Common Faults
Common 0BH/0BT DQ500 problems include mechatronic electronic failure, clutch-position sensor faults, hydraulic pressure-control problems, solenoid/valve faults, clutch-control faults, input-speed sensor failures and gear-selector regulation faults. Typical symptoms include harsh or erratic shifting, failed or delayed Drive/Reverse engagement, gearbox malfunction warnings, transmission shudder, loss of odd or even gears and emergency/limp-home operation.
Common Fault Codes
|
Fault Code |
Description |
|
P1735 / P173500 |
Position sensor for clutch 1 – electrical fault |
|
P1736 / P173600 |
Position sensor for clutch 2 – electrical fault |
|
P0607 / P060700 |
Transmission control module – internal/performance malfunction |
|
P179C / P179C00 |
Main pressure valve – electrical fault |
|
P2716 / P271600 |
Pressure control valve 4 – electrical fault |
|
P175D / P175D00 |
Clutch 1 opens unintentionally |
|
P175E / P175E00 |
Clutch 1 closes unintentionally |
|
P176E / P176E00 |
Clutch 2 opens unintentionally |
|
P176F / P176F00 |
Clutch 2 closes unintentionally |
|
P0715 / P071500 |
Transmission input speed sensor 1 – electrical/no-function fault |
These codes are documented specifically against 0BH/0BT DQ500 mechatronic systems. P1735/P173500 and P1736/P173600 are particularly well-established faults involving the clutch-position sensing system and can result in the transmission disabling one of its two gear sets, leaving the vehicle operating with only odd or even gears