DQ380 / DQ381 / DQ500 Clutch Pressure Sensor Replacement - Mail-In DSG TCU Repair Service

Mail-in clutch pressure sensor replacement for the Bosch TCU fitted to VAG 7-speed wet clutch DSG gearboxes. You send us your transmission control unit, we replace both clutch pressure sensors, bench test the unit before and after, and send your own unit back ready to refit.

Because we repair your original TCU, there is no immobiliser matching, no coding and no adaptation data to transfer. Your unit goes back into the car exactly as it came out, only with healthy sensors.

Fault codes this repair addresses -

• P1735 (VCDS 10666) clutch pressure error 1
• P1736 (VCDS 10668) clutch pressure error 2

Related codes we see alongside these

The codes below regularly appear in the same scan as P1735 and P1736. They report the valve circuits rather than the clutch pressure sensors, so they are not always cleared by a sensor replacement on its own. Send us your full scan before ordering and we will tell you what we expect the repair to resolve.

• P174A (VCDS 10739) valve 3, partial transmission 1, electrical malfunction
• P174E (VCDS 10740) valve 3, partial transmission 2, electrical malfunction
• P179D commonly logged together with the above on DQ500 units

Common symptoms -

• Gearbox drops into limp mode, often when hot
• Flashing PRNDS display or gearbox warning light
• Loss of odd or even gears, so the car shifts 1-3-5-7 or 2-4-6
• Harsh or delayed shifts, slow D or R engagement when warm
• Faults return after a reset or an adaptation

Gearboxes covered -

• DQ380 gearbox code 0DE
• DQ381 gearbox code 0GC
• DQ500 gearbox codes 0BH, 0BT, 0DL

Fitted across Volkswagen, Audi, Skoda, SEAT and Cupra. Common applications include Golf GTI and Golf R (Mk7 and 7.5), Passat, Arteon, Tiguan, Teramont, Audi S3, RS3, TT RS and RS Q3, Skoda Kodiaq and Superb, SEAT Ateca and Leon Cupra, and VW Transporter T5 and T6. Check your TCU part number before ordering.

What sets our repair apart -

• Custom bench testing rig. We record pressure readings before the repair and again afterwards, so the fix is confirmed before the unit leaves us. It is not a solder-and-hope job.
• OE style spot welding. Our spot welding equipment attaches the sensors the same way the factory does. The finished unit looks original.
• Both sensors replaced every time, even when only one has failed. The second sensor has done the same hours and the same heat cycles. Replacing the pair is what makes the repair last.
• Proven record. To date we have not had a pressure sensor fail on a unit we have repaired.
• 12 month unlimited kilometre parts warranty.

Choose your sensor -

• LuK / Schaeffler (upgraded) from the Schaeffler group, a German manufacturer with over 80 years of history. Manufactured in China to an upgraded sensor design.
• Bosch (genuine OE) the same sensor the car left the factory with. Made in Germany.

Both options are covered by the same bench testing process and the same warranty.

Turnaround -

Same or next day. If your unit reaches us in the morning, the repair is completed that day and dispatched that afternoon or the following morning, depending on the carrier.

Trade customers: we offer FedEx overnight pickup and return. Contact us to arrange this before you send your unit.

What to send us -

We do not need the complete mechatronic unit. We only need the main black TCU with the VAG logo and part number on it.

1. Save your original fault codes and adaptation data before you start.
2. Remove the mechatronic unit from the vehicle.
3. Separate the TCU from the mechatronic. It splits away from the valve body.
4. Wrap the TCU securely and box it with your name, phone number, return address and order number enclosed.
5. Send it to the address on your order confirmation.

After you refit -

Reset the adaptation values and relearn the clutch characteristics, not just a basic settings run. Skipping the adaptation reset is the single most common reason fresh clutch codes appear after a sensor replacement, and it gets mistaken for a failed repair. Check the transmission fluid level and temperature are correct before you start.