This is a Universal Fitting Product
This Part Fits Your Vehicle
Product Information
Unitronic® is proud to release its Unlocked DQ381.2 TCU solution, allowing those with locked "401" TCUs access to Unitronic's renowned TCU Performance Software. Now, MK8 GTI®, Golf R® and 8Y S3® enthusiasts can finally experience increased clutch clamping pressure, optimized gear shifts, Advanced Torque Management, dual setpoint adjustable launch control, gear display, and much, much more thanks to Unitronic's unlock solution and TCU Performance Software!
Some 2022 and many 2023+ vehicles built after 02/2022 were equipped with TCUs which have a locked "401" bootloader, previously limiting tuning options. Unitronic's Unlocked DQ381.2 TCU comes ready to plug-n-play into your vehicle with Unitronic's TCU Performance Software.
With the proper tools, equipment, and guidance, this TCU swap is straightforward for most. For added convenience, Unitronic also offers an optional Service Kit, which includes all necessary fluids and hardware needed to detach the TCU from the mechatronic unit and perform a gearbox service. At this stage, enthusiasts can also opt to replace the failure-prone plastic oil tubes with Unitronic's high-strength CNC machined Oil Tubes as well.
As part of Unitronic’s commitment to delivering thoroughly tested and reliable performance solutions, extensive field testing was conducted prior to this release. Special thanks to Unitronic Authorized Dealer, ACM Technik, for their assistance with validations throughout.
NOTE: Unitronic TCU Performance Software is required to use this unlocked TCU. You must have already purchased Unitronic TCU Performance Software, or purchase it alongside this upgrade. For new and existing ECU + TCU customers, DSG® Combo Discounts of up to $150 in SAVINGS are available.
When purchasing this upgrade, please be prepared to provide Unitronic with your TCU ID, TCU Revision, and VIN to ensure the unit can be properly configured for your specific vehicle.
Pairing this Unlocked TCU with Unitronic Performance Software delivers significant improvements for both daily drivers and performance enthusiasts alike. From enhanced drivability to increased transmission responsiveness and optimized shift strategies, this combination transforms the overall driving experience — whether you're commuting or pushing your car to the limit. Key benefits include:
Features:
- Increased clutch pressure (up to 600Nm)
- Advanced torque management
- Faster, crisper gear shifts
- Optimized Drive and Sport modes
- Adjustable dual-setpoint Launch Control
- In-dash gear display and more
What's Included:
- Unitronic ECU Tune
- Unitronic UniCONNECT+ Cable (OPTIONAL)
Important Details:
- Unitronic recommends reviewing the full installation guide ahead of time to get familiar with the process, tools, and components involved in performing this TCU upgrade. While installation is straightforward for experienced enthusiasts, professional installation is still recommended.
NOTE: Product images shown may not be an exact representation of the actual product.
Model + ![]() |
Drivetrain ![]() |
|---|---|
| 8Y S3 2.0T I4 [MQB Evo] | |
| MK8 GTI 2.0T I4 [MQB EVO] | |
| MK8 R 2.0T I4 [MQB EVO] |
Return and Exchange Policy
The Return & Exchange Policy below outlines our current terms. While we try to adhere strictly to the guidelines detailed below, there are always exceptions to the rules, please speak to a BMP Tuning Customer Support Representative for clarification on anything you might have questions about - contact us.
Order Cancellations
Order Cancellation Hours of Operation
- All order cancellations are processed during regular business hours only. Any order cancellation requests made outside of normal business hours will be processed during the next business day.
Order Cancellation Fees
- Any cancelled orders including orders that have not shipped will be subject to a 5% cancellation fee to offset order processing fees that are not refunded to BMP Tuning by financial institutions and fee is waived completely if store credit is requested.
- Cancellation fee applies to any order regardless of stock status, please contact BMP Tuning if there are any questions regarding stock status before placing an order.
- If an order has already been processed or shipped and BMP Tuning is unable to cancel the order, the customer will be responsible for returning the item to us once received. Once the return is received it will be processed like any other return and be subject to the "Return and Exchange Policy" listed below.
- Certain products sold cannot be cancelled after the order has been placed due to agreements with the manufacturer, or in the case of made to order/custom items. This may be noted in the product description, but feel free to contact us to make sure before ordering.
- Any order placed via Katapult are non-refundable; refunds, if required, will be issued via store credit only.
Return & Exchange Policy
Domestic Orders
- BMP Tuning will accept returns for unused products within 1 year/365 Days from the date of purchase.
- Returned products must be new, unused, and must be in the original packaging, including labeling, manuals, hardware, etc. Special order items are non-refundable.
- Returns will NOT be processed for any received products without the proper RMA Form completed and included with the return, customer will also be responsible for return shipping to their original shipping address.
- Returns beyond 60 days of original purchase once processed can only be refunded as BMP Tuning store credit.
- In the case of an exchange, BMP Tuning will waive normal restocking fees and only collect for original shipping of the returned product unless otherwise stated by a BMP Tuning Customer Service Representative when requesting your RMA number.
- Once store credit has been issued for a return, it is final and cannot be reversed or exchanged for a refund to your original payment method at a later time. Please ensure you are comfortable with receiving store credit before completing your return.
- Contact us within 7 days of delivery if an item has arrived damaged or incorrectly so that we can rectify the situation with the responsible party. Any notifications past 7 days from delivery could cause issues with replacement and BMP Tuning is not liable for any mis-shipments or damaged items if notified past the 7th day.
- Once delivered to shipping address provided, packages are customer’s responsibility—consider requesting a signature upon delivery or insuring your order with Route.
International Orders
- New, unopened products can be returned within 60 days of purchase.
- Opened/used products and Scratch & Dent parts cannot be returned.
- Contact us within 7 days if your item is damaged upon receipt.
- Once delivered, packages are customer’s responsibility—signature confirmation is available upon request.
- Any international orders that are refused at the time of delivery will be subject to carrier abandonment of the package, at which time the ordered products would be discarded by the carrier. The customer will not be refunded for the value of the order and the discarded products are no longer retrievable.
Return Fees & Shipping:
- Customer is responsible for a 20% restocking fee, original shipping, and return shipping.
- In instances where the customer received FREE shipping, the shipping amount that BMP Tuning paid on behalf of the customer will be deducted from the total refund.
- BMP Tuning's restocking fee is waived in the instance customer requests store credit as long as the item is being returned to BMP Tuning and not the manufacture directly.
- Any orders that are returned to BMP Tuning as refused by receiver or non-deliverable will be subject to a return handling fee and will be processed as a return in compliance with our "Return and Exchange Policy", including a 20% restocking fee.
- Any returns that are denied for any reason will be sent back to the customer at the customers expense. Any denied return left with BMP Tuning longer than 30 days is considered forfeited by the customer and will be disposed of by BMP Tuning at BMP Tuning's discretion.
- Any order placed via Katapult are non-refundable; refunds, if required, will be issued via store credit only.
Route Shipping Protection - Refunds & Cancellations
- Route shipping protection is an insurance purchased for your shipment. Because of this, any protection on items that have already been shipped cannot be refunded.
- If your order is cancelled PRIOR to the items shipping, then the Route purchase can be refunded with the cancelled item(s). Once the order has shipped, we cannot refund the Route shipping protection.
Tariffs & Duties – No Refund Upon Return
- BMP Tuning is not responsible for any tariffs, duties, or import fees charged by customs authorities or shipping carriers.
- If you return an item, any tariff or duty you paid at delivery will not be refunded by BMP Tuning, as those are non-refundable government charges.
- Refunds for returned items will be limited to the cost of the product (minus applicable fees), not including any tariffs or duties originally paid.
- Please ensure you understand your country’s import fee obligations prior to ordering.
- If you have questions about potential tariffs, duties, or returns, contact us before placing your order—we’re happy to assist.
- All existing policy conditions (restocking fees, RMA requirement, return shipping responsibilities) still apply as stated in the original policy.
Product Return Exemptions
Tuning Software And Cables
BMP Tuning will NOT accept returns for any tuning software or tuning cables. This includes, but is not limited to:
- ECU Tunes
- TCU Tunes
- Tuning Cables such as IE POWERlink V4 Flash Cable, APR Ultralink, Unitronic UniCONNECT+ Cable, 034Motorsport Dynamic+ Tuning Cable
- Plug and Play Tuners such as Burger Motorsports JB4, COBB AccessPort
- OBDEleven Pro
Scratch & Dent, Open Box, and Clearance Items
There are absolutely no returns on any product sold as "Scratch & Dent", "Open Box", or "Clearance."
Pricing Or Photo Errors
- While we always try to provide the most accurate product and pricing information, we are humans and can make mistakes. If we listed an incorrect price or information for any product on our site, BMP Tuning reserves the right to refuse or cancel any orders placed. PRICING AND AVAILABILITY ARE SUBJECT TO CHANGE WITHOUT NOTICE.
- We try to ensure that all products are represented properly in description and photo. However, due to photos provided from manufacturers, sometimes a photo might be outdated or a generic photo for the part may be used for the item. If you have any questions about any product, please contact us before placing your order.
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