2017 - 2022 Audi B9 S4 S5 ECU TUNE (REMOTE)
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2017 - 2022 Audi B9 S4 S5 ECU TUNE (REMOTE)

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$550.00 $450.00
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Width:
7.00 (in)
Height:
1.00 (in)
Depth:
7.00 (in)
Current Stock:
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Description
Select Stage:

Stage Power Comparison

Stage 1
446
HP / Stock Hardware
570 TQ
No hardware required
ECU + TCU package available
Stage 2
480
HP / High-Flow Exhaust
580 TQ
High-flow exhaust required
ECU + TCU package available
BOOST DYNAMIC TUNING

BDT Stage 1 ECU + TCU Tune

2017–2022 Audi S4 / S5 3.0T (B9)

BDT Stage 1 combines an in-house ECU calibration with an optimized AL552 8-speed TCU tune. The result is a harder-hitting S4/S5 that not only makes more power, but actually uses it — with smarter shift logic, faster shifts, and better overall drivability. +101 HP / +205 TQ over stock.

Quattro AWD ECU + TCU Available Crackle Pops Launch Control Remote OBDII Flash
Audi S4 S5 3.0T Stage 1 BDT

Fitment & Compatibility

 

Vehicle: 2017–2022 Audi S4 / S5 3.0T (B9 / B9.5)

Engine: 3.0T TFSI V6

  • Quattro AWD
  • AL552 8-speed automatic
  • 91–93 octane
  • Remote OBDII flashing compatible

ECU Calibration Highlights

  • 446 HP / 570 TQ (from 345 HP / 365 TQ stock)
  • Sharper throttle response
  • Optimized boost, timing, and fueling
  • Refined torque management — cooperates with AL552 TCU
  • Crackle Pops (Low / Medium / Intense, on request)
  • Exhaust valves stay open in Dynamic/Sport
  • Auto Start/Stop defaults OFF
  • Speed limiter removed
  • OBDII port flashing

TCU Calibration Highlights

AL552 8-speed automatic — calibrated alongside the ECU for seamless behavior.

  • Raised torque limits — no premature intervention
  • Faster, more decisive shifts in Dynamic/Sport
  • Optimized shift points — stays in the powerband
  • Smoother part-throttle behavior around town
  • Launch control activated — adjustable by request
  • Reduced kickdown in Manual mode
  • Line/clutch pressure adjusted for shift feel under load

Power Gains

Configuration HP TQ
Stock BDT Baseline 345 HP 365 TQ
Stage 1 ECU + TCU 446 HP 570 TQ
Total Gain +101 HP +205 TQ
Stage 2 (high-flow exhaust req.) 480 HP 580 TQ

ECU gains measured at the wheels. TCU changes improve real-world acceleration further.

 

Mod Requirements

Stage 1 requires no hardware modifications. Stock hardware friendly. Intake, intercooler, and high-flow exhaust are not required but enhance results at Stage 2.

S4/S5 EXHAUST + DRIVING DEMO

S4/S5 REMOTE TUNING PROCESS

BOOST DYNAMIC TUNING

BDT Stage 2 ECU + TCU Tune

2017–2022 Audi S4 / S5 3.0T (B9)

Stage 2 is for S4/S5 owners running supporting modifications and looking for more aggressive boost, timing, and exhaust behavior. Up to 480 HP / 580 TQ at the wheels. This isn't just a tune — it's a transformation.

High-Flow Exhaust Req. Quattro AWD ECU + TCU Available Crackle Pops Launch Control
Audi S4 S5 3.0T Stage 2 BDT
Stage 2 Requirement: High-flow exhaust is required. Intake and intercooler strongly recommended.

Stage 2 ECU Highlights

  • 480 HP / 580 TQ (from 345 HP / 365 TQ stock)
  • +135 HP / +215 TQ over stock
  • Sharper throttle response
  • Optimized boost and fueling
  • Crackle Pops (Low / Medium / Intense)
  • Exhaust valves stay open in Dynamic/Sport
  • Auto Start/Stop defaults OFF
  • Speed limiter removed
  • OBDII port flashing

Stage 2 TCU Highlights

  • Raised torque limits for full Stage 2 power
  • Faster, sharper shifts
  • Optimized shift points
  • Launch control calibrated
  • Better manual mode behavior
  • Line/clutch pressure adjusted
 

Power Gains

Configuration HP TQ
Stock BDT Baseline 345 HP 365 TQ
Stage 1 (reference) 446 HP 570 TQ
Stage 2 ECU + TCU 480 HP 580 TQ

Stage 2 Modification Requirements

Upgrade Matrix

Part / Upgrade Required Recommended
High-Flow Exhaust YES —
Air Intake — YES
Intercooler — YES
⚠️ WINDOWS LAPTOP REQUIRED (NO APPLE / MACOS) • STABLE INTERNET • BDT-SUPPLIED TUNING INTERFACE

How Remote Tuning Works — Flash From Home

We connect via TeamViewer, walk you through reading your stock ECU and TCU, then flash the updated calibrations in real time. You're on a live session with the actual tuner — the person who built your files.

 

What You Need

  • Windows laptop — macOS not supported
  • Stable internet connection
  • BDT-supplied tuning interface (included with purchase)
  • Battery charger — 10–25 amp, connected entire session
  • TeamViewer Quick Support (free)

Step-by-Step

  1. 1

    Schedule your flash session after purchase.

  2. 2

    Download TeamViewer Quick Support.

  3. 3

    Connect battery charger.

  4. 4

    Key on, engine off.

  5. 5

    Plug in the interface — OBDII port to USB.

  6. 6

    Share your TeamViewer ID. BDT handles everything.

  7. 7

    Key off on command. Fault codes clear on their own.

  8. 8

    Disconnect & drive.

WATCH: HOW REMOTE TUNING WORKS

After the flash: Fault codes may appear — 100% normal. They clear after a short drive cycle.
Can't make your scheduled time? Reschedule at least 1 hour in advance. Late arrivals without notice are subject to a $50 fee.

Frequently Asked Questions

 

Q: What's the difference between Stage 1 and Stage 2?
A: Stage 1 is ideal for stock or lightly modified S4/S5. Stage 2 is for cars running a high-flow exhaust and supporting mods for more aggressive power.

 

Q: Do I need the TCU tune?
A: It's not required, but strongly recommended. The TCU tune raises torque limits, improves shift logic, and enables launch control. Without it, the transmission may limit how much of the ECU's power you actually feel.

 

Q: What do I need for Stage 2?
A: A high-flow exhaust is required. Intake and intercooler are strongly recommended.

 

Q: What fuel does it support?
A: 91/93 octane pump gas.

 

Q: Can I flash at home?
A: Yes. 100% remote with live support from the actual calibrator. A Windows laptop is required.

 

Q: Can I adjust crackle levels?
A: Yes. Low, Medium, or Intense levels available on request.

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.

Federal and State Emissions Compliance

  • This product may modify, bypass, defeat, or render inoperative one or more emissions control devices.
  • Use on emissions-regulated vehicles is strictly prohibited by federal law and may result in penalties up to $45,000 per vehicle under the Clean Air Act.
  • This product is not certified by the EPA or CARB, and is not legal for sale or use in California or any CARB-adopting state.

Assumption of Risk and Waiver of Liability

  1. Assume all risk and responsibility for compliance with applicable laws.
  2. Waive all claims against Boost Dynamic Tuning, LLC and affiliates.
  3. Release Boost Dynamic Tuning, LLC from damages 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 inconsistent with this disclaimer.

Final Notice

This product is sold "as is", with no warranties regarding legality for public highway use. It is the sole responsibility of the end-user to determine legality. Boost Dynamic Tuning, LLC does not condone 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.

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