2021 - 2025 MILD HYBRID Audi 45 TFSI B9.5 A5 A4 2.0t Stage 1 (Remote Tune)

Unleash the Full Potential of Your 2021–2025 Audi A4 A5 45 TFSI (B9.5)

Exclusively Tuned by Boost Dynamic Tuning — The Only USA-Based Solution

If you own a 2021+ Audi A4 or A5 with the hybrid 2.0T, you’re holding untapped power — and we’re the only ones in the U.S. who know how to unlock it. At Boost Dynamic Tuning, we don’t follow the crowd — we lead it. Our Stage 1 ECU calibration is designed specifically for this platform, and no one else in the country offers what we do.

With over 11 years of experience and in-house calibration expertise, we don’t rely on “theoretical gains.” Every tune we offer is backed by real-world testing and before-and-after dyno results — no smoke, no mirrors, no fuel additives. Just raw, authentic power.

Why Choose BDT?

• Exclusivity: We are the only tuner in the U.S. offering a tested and proven solution for the B9.5 hybrid platform.

• Authenticity: All of our files are built and refined in-house — no resellers, no copy/paste maps.

• Transparency: What you see is what you get — every claim backed by dyno data.

• Remote Convenience: Flash from home via OBDII port — no shop visit required.

This isn’t just tuning — it’s engineering with passion, built for those who demand more from their car.

CUSTOM REVIEWS LIVE PHONE CHAT!

BDT Stage 1 Highlights

Unleash Up to 283 WHP / 300 WTQ on Pump Gas

• Optimized Boost and Torque Delivery

• Intake Air Temp Safety (Throws a warning light on the dash to let you know you're pushing the car too hard)

• Speed Limiter Removed

• Torque Limiters Raised

• Raised Rev Limiter (Neutral/Park)

• Load Limits Raised

• Auto Start/Stop Defaults Off (Still Functional)

• Crackle/Overrun in Dynamic Mode Only

• Calibrated Stock Boost Gauge for Higher Readings

• Sharper Throttle Response & Reduced Turbo Lag

• Increased LPFP & HPFP Pressure

• VVT Recalibration

• Flashable via OBDII — No Physical Mods Required

Built for the Streets. Proven on the Dyno.

Whether you're carving through backroads or making a statement at your next meet, this tune gives your Audi the edge — with the refinement you'd expect from a luxury performance build.

Stop leaving power on the table. Elevate your driving experience with BDT’s Stage 1 tune — crafted exclusively for your 2021+ B9.5 Audi A4/A5 45 TFSI.

DYNO SESSION LIVE

Crackle Pops (Overrun Feature)

Bring your Audi to life with our overrun/crackle calibration — a crowd-favorite feature that adds drama and personality to every drive.

When decelerating from higher RPMs or free-revving in Neutral/Park, you’ll hear sharp, exhilarating pops and crackles from your exhaust and downpipe. It’s a controlled and safe enhancement designed to deliver an aggressive sound profile that turns heads — especially when paired with an aftermarket exhaust.

Note: While still present, the effect may be more subtle on stock exhaust systems. We also implemented a safety to reduce crackles if exhaust temperatures get to high.

Whether you're rolling through the city or staging up at a meet, this feature adds a signature soundtrack that sets your car apart.

⚡ Boost Control Optimization

From the factory, the stock ECU delivers a rough and inconsistent boost curve — often resulting in delayed throttle response and a lack of urgency during high-load pulls.

With BDT’s Stage 1 ECU Calibration, we completely refine the boost control strategy to deliver:

• Smoother, more linear boost delivery

• Sharper throttle response

• Consistent power across the entire powerband

Whether you're launching from a dig or pulling through gears on the highway, the result is immediate, predictable power that keeps you planted and fully engaged.

Feel the difference: smoother transitions, no hesitation, just pure acceleration.

Remote Tuning How-To

POWER GAINS

ECU TUNE MODIFICATION REQUIREMENTS

SOFTWARE INSTALLATION REQUIREMENTS

EMISSIONS COMPLIANCE NOTICE & LEGAL DISCLAIMER

FOR COMPETITION USE ONLY — NOT FOR STREET USE

This product is sold and intended solely for vehicles used in closed-course racing, off-road competition, or organized motorsport events. It is not legal for use on any pollution-controlled vehicle operated on public roads or highways, as defined under the Clean Air Act (42 U.S.C. § 7522) and applicable state emissions laws.

By purchasing, installing, or using this product, you explicitly acknowledge and agree to the following terms:

Federal and State Emissions Compliance

• This product may modify, bypass, defeat, or render inoperative one or more emissions control devices, including but not limited to: catalytic converters, oxygen sensors, EGR systems, or OBD monitoring systems.

• The installation or use of this product on any vehicle subject to emissions regulations is strictly prohibited by federal law and may result in civil or criminal penalties, including fines up to $45,000 per vehicle under the Clean Air Act.

• This product is not certified by the Environmental Protection Agency (EPA) or the California Air Resources Board (CARB), and is therefore not legal for sale or use in California or any state that follows CARB standards.

Assumption of Risk and Waiver of Liability

By purchasing and/or installing this product, you agree to:

1. Assume all risk and responsibility for compliance with applicable local, state, and federal laws and regulations.

2. Waive all claims, liabilities, and legal actions against Boost Dynamic Tuning, LLC, its officers, directors, employees, and affiliates arising from the purchase, installation, or use of this product in violation of any applicable law.

3. Release Boost Dynamic Tuning, LLC from any and all damages, injuries, or penalties resulting from improper or unlawful use.

⚖️ Indemnification Clause

You further agree to indemnify, defend, and hold harmless Boost Dynamic Tuning, LLC from any fines, penalties, damages, losses, or legal fees resulting from:

• Use of this product in a manner inconsistent with this disclaimer

• Misrepresentation of vehicle use

• Violation of any emissions laws or regulations

Final Notice

This product is sold “as is” and “with all faults”, with no warranties, expressed or implied, regarding legality for public highway use or emissions compliance.

It is the sole responsibility of the end-user to determine the legality of this product for the intended application. Boost Dynamic Tuning, LLC does not condone or recommend illegal street use or emissions equipment tampering.

By completing your purchase, you acknowledge that you have read, understood, and agreed to this disclaimer in full.

 **  PLEASE NOTE, IF YOU SCHEDULE AN APPOINTMENT WITH US TO FLASH YOUR TUNE, AND YOU ARE LATE WITH NO CONTACT, THERE WILL BE A $50 LATE FEE APPLIED. IF YOU NEED TO RESCHEDULE YOUR TUNE, YOU MUST CONTACT US AT LEAST AN HOUR BEFORE YOUR APPOINTMENT, OR THERE WILL BE A $50 FEE APPLIED. **

DOWNPIPE NOTICE: BY PURCHASING A MOTORSPORT/RACING PRODUCT ("PRODUCT"), YOU REPRESENT THAT YOU UNDERSTAND AND AGREE THAT: THE PRODUCT IS NOT DESIGNED TO MEET ANY APPLICABLE EMISSIONS STANDARDS, WHETHER IN THE USA OR OTHERWISE, THE PRODUCT IS NOT C.A.R.B. COMPLIANT, AND THAT THE PRODUCT IS NOT FOR SALE OR USE IN CALIFORNIA, USA NOR ANY OTHER JURISDICTION WHERE THE SALE OR USE IS PROHIBITED BY LAW. BOOST DYNAMIC TUNING, LLC MAKES NO REPRESENTATIONS, WARRANTIES, OR CLAIMS THAT THIS PRODUCT COMPLIES WITH ANY APPLICABLE EMISSIONS LAWS AND EXPRESSLY DISCLAIMS ANY AND ALL SUCH REPRESENTATIONS, WARRANTIES, AND CLAIMS, WHETHER EXPRESS OR IMPLIED. BY PURCHASING THIS PRODUCT, YOU REPRESENT, WARRANT, AND AGREE THAT IT IS YOUR RESPONSIBILITY TO INFORM YOURSELF OF ANY LAWS OR REGULATIONS THAT MAY APPLY TO YOUR PURCHASE AND/OR USE OF THE PRODUCT.