2001 - 2002 Audi A4 B5 ECU TUNE
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2001 - 2002 Audi A4 B5 ECU TUNE

$500.00 $400.00
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Width:
7.00 (in)
Height:
6.00 (in)
Depth:
1.50 (in)
Current Stock:
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Description
Software Product — No Vehicle IncludedThis listing is an ECU calibration file and remote flashing service for the vehicle listed above. Boost Dynamic Tuning does not sell, broker, or supply motor vehicles. Vehicle names, model years and photographs are used solely to identify which car this software is compatible with.

Pick Your Stage

B5 A4 1.8T numbers, straight off a filmed dyno pull — no inflated crank math anywhere on this page. Tap a stage to select it and jump to checkout.

Stage 1
245WHP
250 WTQ · stock turbo
91/93 octane · diverter valve & colder plugs
Select & Buy
Stage 2
265WHP
285 WTQ · turbo maxed
91/93 octane · high-flow exhaust
Select & Buy

Both stages want a diverter valve and colder plugs first, and the stock turbo is done at Stage 2 — past that you’re buying a turbo, not a file. Text us your build and we’ll tell you straight.

Boost Dynamic Tuning

Audi A4 B5 1.8T ECU Tune

Choose Your Stage & Get Tuned →
Stock file saved before we write · Flash back to factory free, any time · Remote OBDII flash from your driveway

Real Numbers. Real Pulls.

Tap a stage — power, fuel, and required mods at a glance. Wheel figures on pump gas.

Horsepower245WHPstock turbo
Torque250WTQDV + plugs required
Fuel: 91/93 octaneRequired mods: diverter valve + colder plugsData: peaks dyno-verified
Horsepower265WHPturbo maxed
Torque285WTQwith high-flow exhaust
Fuel: 91/93 octaneRequired mods: high-flow exhaustData: peaks dyno-verified
Horsepower350+WHPbig turbo build
Torque350+WTQbuilt to your combo
Fuel: pump / race per buildRequired mods: big turbo build — contact BDTData: peaks dyno-verified
 

How It Works — Remote Flash or PnP ECU

Two ways to get tuned: a live BDT remote flash, or an immobilizer-off plug-and-play ECU swap.

1

Schedule — after purchase, book your remote flash session with BDT.

2

Set Up — Windows laptop with TeamViewer, our cable in the port, battery maintainer on the car, key in accessory.

3

We Flash It — BDT remotes into the laptop and runs the whole flash while you watch live.

4

Drive — key off on command, unplug, done. Fault codes right after flashing are normal and clear after a short drive cycle.

N80 / N249 removal available for off-road use. PnP immobilizer-off ECU option always starts. This ECU family flashes via a live BDT remote session. Self-flashing with the BDT Flasher lands when this platform is ported.

What's Included

✓
2-Step Launch ControlBuild boost on the line — demo on video below
✓
Crackle PopsOverrun crackles — pick your level
✓
Immobilizer Delete (PnP)Optional plug-and-play ECU swap — drop in and go
✓
Speed + Rev LimitersVmax removed, rev limit raised
✓
Big Turbo ReadyStage 3 calibrations for K04 / GT-series builds
✓
Remote OBDII FlashFlashed from home over a live BDT session

Feature Demos

2-step, crackles, and a Stage 3 build doing work. Sound on.

2-Step Launch Demo

Crackle Pops Demo

Stage 3 Demo

 

What Your Car Needs, Per Stage

If it is not listed as required, the tune runs without it.

REQ Required before flashing REC Recommended — Not needed
Part / UpgradeStage 1Stage 2Stage 3
Diverter Valve UpgradeREQREQREQ
Colder PlugsREQREQREQ
High-Flow Exhaust—REQREQ
Big Turbo + Fueling Built per combo — contact BDT——REQ
 

Your ECU Is Safe

Your stock file is savedWe read and archive your factory file before a single byte is written. You can flash back to stock at any time, free.
Verified writes, safe abortsEvery flash is checksum-verified. If the connection drops mid-write the process aborts safely and can be resumed — it does not leave your ECU half-written.
You talk to the calibrator11+ years of in-house VAG calibration. The person who built your file is the person on the phone — not a reseller passing on someone else’s tune.
Ready? Choose Your Stage →
Stock file saved before we write · Flash back to factory free, any time · Remote OBDII flash from your driveway

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 EPA or CARB, and is therefore not legal for sale or use in California or any CARB-adopting state.

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 inconsistent with this disclaimer, misrepresentation of vehicle use, or 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 legality 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.

HIGH-FLOW EXHAUST 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 DESIGNED TO BE 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.