This Part Fits Your Vehicle
Product Information
Take Control. Unlock From Home.
The 034Motorsport 034SPI Boot Loader Unlock Harness and Software gives you direct end-user access to unlock AL552 TCUs equipped with the locked 401 boot loader. No hardware swaps or shipping, no overpriced third-party tools, and no waiting. This solution puts full control in your hands.
Engineered for Direct, Seamless Integration
Using a 034Motorsport TCU flashing harness, the system connects directly to the transmission in conjunction with the 034Motorsport SPI flashing dongle. 034SPI BLU allows you to connect directly to the TCU, even bypassing the factory OBD system. The 034SPI BLU software then safely and efficiently unlocks the TCU with a streamlined process that can be completed from your phone, mobile device, and laptop, or through your preferred 034 tuning dealer.
The First True End-User Solution
This is the first solution of its kind to offer end-user boot loader unlocking without additional hardware or complicated processes. 034Motorsport has opened up the problematic 401 boot loader unlock to the people, to easily open up a world of TCU tuning options previously thought impossible! It integrates seamlessly with existing 034Motorsport flashing tools and is included at no cost for all existing Dynamic+ TCU tune customers, making it fast, accessible, and easy to use.
This is the market’s first true at-home boot loader unlock solution. No replacing your mech unit, no overpriced extra tools, no shop labor costs. 034Motorsport puts you in control with a faster, simpler, more accessible path to unlocking and tuning.
Complete the Dynamic+ Driving Experience
Unlocking your factory TCU enables Dynamic+ TCU tuning, delivering refined shift strategies, improved drivability, and safe power delivery to complement ECU tuning. The result is smoother operation, quicker response, and a more cohesive performance transformation. The TCU is the second side of power, performance and drivability to the ECU, ensuring both are optimized will give the fastest, safest, most refined driving experience.
Built for the Latest Audi Platforms
Designed for supported 2022+ Audi models equipped with the AL552 transmission and locked 401 boot loader, this solution provides the necessary foundation to run Stage 1, Stage 2, or Stage 3 TCU tunes. Note: 034Motorsport BLU functionality is only available for 034Motorsport tunes, and is not compatible or usable with tunes from other companies.
Features:
- BLU (Boot Loader Unlock) functionality only works with 034Motorsport Dynamic+ TCU software. Once the unlock is performed, only 034Motorsport Dynamic+ TCU tuning, or fully stock TCU tuning can be flashed to that transmission via the OBD port.
- There are two different harness designs to support the different connectors found on the DQ381 G2 compared to the AL552/952.
- BLU harnesses are not VIN-locked and are not tied to a server account, similar to our R4 flashing dongles.
What's Included:
- 034Motorsport 034SPI Boot Loader Unlock (BLU) Harness
NOTE: Product images shown may not be an exact representation of the actual product.
Model + ![]() |
Drivetrain ![]() |
|---|---|
| 4M Q7 2.0T I4 | + |
| 4M Q7 3.0T V6 | + |
| 4M Q8 3.0T V6 | + |
| 4M RS Q8 4.0T V8 | + |
| 4M.5 Q7 2.0T I4 | + |
| 4M.5 Q7 3.0T V6 | + |
| 4M.5 RS Q8 4.0T V8 | + |
| 4M.5 SQ7 4.0T V8 | + |
| 4M.5 SQ8 4.0T V8 | + |
| B9 RS4 2.9T V6 | |
| B9 RS5 2.9T V6 | |
| B9 S4 3.0T V6 | |
| B9 S5 3.0T V6 | |
| B9.5 RS4 2.9T V6 | + |
| B9.5 RS5 2.9T V6 | + |
| B9.5 S4 3.0T V6 | + |
| B9.5 S5 3.0T V6 | + |
| C8 RS6 4.0T V8 | |
| C8 RS7 4.0T V8 | |
| C8 S6 2.9T V6 | |
| C8 S7 2.9T V6 | |
| D5 A8 3.0T V6 | |
| FY SQ5 3.0T V6 | + |
| FY.5 SQ5 3.0T V6 | + |
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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