2017–2020 Audi A4 / A5 2.0T (B9/B9.5) – BDT Stage 1 ECU Tune

What is our tune all about?

Slide behind the wheel, tap the start button, and feel the difference — this isn’t your stock B9 A4/A5 anymore. With Boost Dynamic Tuning’s Stage 1 ECU calibration, every green light becomes an excuse to grin. Power delivery is instant, torque hits hard, and that 2.0T finally wakes up the way Audi should have delivered it from the factory.

Roll into the throttle and the car pulls — effortlessly, aggressively, addictively. Whether you’re carving backroads, ripping down the freeway, or just flexing on a casual night cruise, this tune transforms your luxury sedan or coupe into a true sleeper. It’s smooth when you want it, savage when you don’t — the perfect balance of refinement and chaos.

_________________________________________________________________________________________________________________________________

BDT STAGE 1 TUNE FEATURES

• Increased Horsepower and Torque Gains
• Speed Limiter Removed
• Neutral/Park Rev Limiter Raised
• Auto Start/Stop Defaults to Off (still fully functional via button)
• Torque Limiters Raised for improved mid-range punch
• Fueling Strategy Optimized based on load and throttle position
• Stock Boost Gauge Recalibrated to display higher boost levels
• Overrun / Crackle enabled in Dynamic mode (optional on request)
• Boost Control Refined for a smoother, more linear boost onset
• Turbo Lag Reduced for sharper response
• Low-Pressure Fuel Pump Pressure Increased
• High-Pressure Fuel Pump Pressure Increased
• Variable Valve Timing Recalibrated for improved efficiency and response
• Flashable via OBDII Port – no ECU removal required

__________________________________________________________________________________________________________________________________________________________

B9 A4 / A5 2.0T – STAGE 1 POWER

Experience the thrill of real-world performance with Boost Dynamic Tuning’s Stage 1 ECU calibration, engineered to deliver up to 282 Wheel HP and 360 Wheel TQ — without sacrificing drivability or reliability. Our calibration safely and effectively unlocks the full potential of your factory turbocharger, giving you the confidence to run with much faster cars while still enjoying OEM-like smoothness in daily driving.

CRACKLE POPS (OVERRUN FEATURE)

Our optional crackle / overrun feature adds a motorsport-inspired soundtrack to your B9. When you decelerate from high RPM or rev freely in Neutral/Park, you’ll hear crisp pops and crackles from the exhaust and downpipe (more noticeable with an aftermarket exhaust). It’s the perfect way to add character and excitement to your already engaging 2.0T.

BOOST CONTROL

From the factory, the ECU’s boost control strategy can feel inconsistent, with a lazy boost curve and sluggish response during longer pulls. With BDT’s Stage 1 ECU Tune, we reshape and refine the boost control logic for a smoother, more linear curve and sharper response. Power comes on cleanly and predictably, giving you confidence every time you put your foot down.

Remote Tuning Overview

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.