2017 - 2020 Audi A4 B9 A4 A5 2.0t ECU TUNE (REMOTE)
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2017 - 2020 Audi A4 B9 A4 A5 2.0t ECU TUNE (REMOTE)

Availability:
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$550.00 $450.00
(1 review)
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
~282
WHP / Stock Turbo
~360 WTQ
No hardware required
Stock turbo friendly
Stage 2
~362
HP / High-Flow Exhaust
~442 TQ
High-flow exhaust required
Stock turbo maxed
BOOST DYNAMIC TUNING

BDT Stage 1 ECU Tune

2017–2020 Audi A4 / A5 2.0T TFSI (B9)

Audi built the B9 2.0T to be smooth — then they tuned it like a lease return. BDT Stage 1 is the factory fix your A4/A5 should've shipped with. Harder midrange torque, faster spool, cleaner pulls, and instant throttle snap — without turning your daily into a drama queen.

Stock Turbo Friendly FWD + Quattro Crackle Pops Remote OBDII Flash
Audi A4 A5 B9 2.0T Stage 1 BDT

Fitment & Compatibility

 

Vehicle: 2017–2020 Audi A4 / A5 2.0T TFSI (B9 / B9.5)

Engine: EA888 Gen 3 2.0T (IS20 turbo)

  • FWD & Quattro supported
  • Automatic / DSG supported
  • 91–93 octane
  • Remote OBDII flashing compatible

Stage 1 Highlights

  • Up to ~282 WHP / ~360 WTQ on 93 octane
  • Speed limiter removed
  • Rev limiter raised (neutral/park)
  • Torque limiters raised
  • Fueling optimized by load & throttle
  • Refined boost control — linear onset, smoother pulls
  • Reduced turbo lag
  • LPFP/HPFP targets optimized
  • VVT recalibrated
  • Boost gauge recalibrated for higher boost display
  • Crackle Pops (optional, Dynamic/Sport mode)
  • Auto Start/Stop defaults OFF
  • OBDII port flashing

Crackle Pops (Overrun)

Optional overrun available by request. Activates only in Dynamic/Sport. Three levels: Low / Medium / High. Subtle on stock exhaust, wild on freer-flowing setups. Calibrated with RPM windows and exhaust temp safeties.

Boost Control

Factory boost can feel uneven during long pulls. BDT Stage 1 refines boost control for a linear, predictable surge with improved response and stability — especially when you roll into it mid-gear.

 

Power Gains

Stage Power Torque
Stock Audi Advertised 232 HP 262 TQ
Stage 1 93 Octane ~282 WHP ~360 WTQ
Stage 2 (high-flow exhaust req.) ~362 HP ~442 TQ

Results vary by dyno type, altitude, heat-soak, fuel quality, and hardware.

Stage 1 Modification Requirements

Stage 1 is stock-turbo / stock-exhaust friendly. No hardware required.

Upgrade Matrix

Part / Upgrade Required Recommended
TCU / DSG Tune — HIGHLY REC.
Air Intake — YES
Intercooler — YES
Spark Plugs Fresh set recommended — YES
Ignition Coils OEM healthy coils — YES
High-Flow Exhaust — NOT COMPATIBLE (S1)
BOOST DYNAMIC TUNING

BDT Stage 2 ECU Tune

2017–2020 Audi A4 / A5 2.0T TFSI (B9)

Stage 2 transforms the B9 into a sleeper missile: faster spool, stronger mid-range torque, and crisp power delivery that stays smooth enough to daily. Up to ~362 HP / ~442 TQ on 93 octane with supporting hardware. Refined when you want it. Savage when you don't.

High-Flow Exhaust Req. FWD + Quattro Crackle Pops Remote OBDII Flash
Audi A4 A5 B9 2.0T Stage 2 BDT
Stage 2 Requirement: A high-flow exhaust is required.

Stage 2 Highlights

  • Up to ~362 HP / ~442 TQ on 93 octane
  • Speed limiter removed • Rev limiter raised
  • Torque limiters raised
  • Fueling optimized by load & throttle
  • Refined boost control — linear, predictable power
  • Reduced turbo lag
  • LPFP/HPFP targets optimized
  • VVT recalibrated
  • Boost gauge recalibrated
  • Crackle Pops (optional, Dynamic/Sport mode)
  • Auto Start/Stop defaults OFF
  • OBDII port flashing

Mod Requirements

Part Req. Rec.
High-Flow Exhaust YES —
TCU / DSG Tune — HIGHLY REC.
Air Intake — YES
Intercooler — YES
Drivetrain Inserts — YES
 

Power Gains

Stage Power Torque
Stock Audi Advertised 232 HP 262 TQ
Stage 1 (reference) ~282 WHP ~360 WTQ
Stage 2 93 Octane ~362 HP ~442 TQ
⚠️ WINDOWS LAPTOP REQUIRED (NO APPLE / MACOS) • 50+ Mbps INTERNET • MIN 8GB RAM / STABLE USB CONNECTION

How Remote Tuning Works — Flash From Home in Minutes

No shop. No downtime. Your entire ECU calibration is completed from your driveway — BDT logs into your laptop remotely and handles every button press.

 

Step-by-Step

  1. 1

    Schedule: Scan the QR code included with your cable to book your session.

  2. 2

    Download TeamViewer Quick Support.

  3. 3

    Connect battery charger: 10–25 amps, connected the entire session.

  4. 4

    Key on, engine off: Accessory mode.

  5. 5

    Plug in the cable: OBDII port to USB on your laptop.

  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.

The whole flash takes about 15–20 minutes. BDT is live on call the entire time.

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.
Cable return: Cable must be shipped back within 3 business days after tune is complete, or a $1,000 charge will apply.

Frequently Asked Questions

 

Q: Does Stage 1 require a high-flow exhaust?
A: No. Stage 1 does not require a high-flow exhaust. Intake and intercooler are recommended for best consistency.

 

Q: What do I need for Stage 2?
A: A high-flow exhaust is required. TCU tune, intake, intercooler, and drivetrain inserts are recommended.

 

Q: What fuel does it support?
A: 91/93 octane pump gas. Premium fuel recommended for best results.

 

Q: Can you enable/adjust crackles?
A: Yes. Optional crackle is available by request (Dynamic/Sport only) and can be enabled, disabled, or tailored to your preference.

 

Q: Does it work with FWD and Quattro?
A: Yes. Both FWD and Quattro B9 A4 and A5 models are fully supported.

 

Q: Can I flash at home?
A: Yes. Remote OBDII flashing with full support is included. A Windows laptop is required.

Maintenance (Read This)

IF YOU WANT YOUR CAR TO SURVIVE, THESE MUST BE DONE!

I WANT YOUR CAR TO SURVIVE MULTIPLE YEARS TO COME WITH MY TUNE. I DON'T RECOMMEND THESE FOR FUN. I HAVE TUNED COUNTLESS EA888 CARS AND THIS IS WHAT I'VE SEEN THROUGH THE YEARS. IF YOU CAN'T AFFORD THE PARTS, PLEASE DON'T TUNE YOUR CAR. BEING STRAIGHTFORWARD SO YOU DON'T BLAME MY TUNE.

 
Maintenance Item Interval
SPARK PLUGS
NGK Racing Plugs		 15–20K mi
OIL CHANGE
5W-40 Liqui Moly • OEM FILTER ONLY		 5K mi
TRANSMISSION SERVICE / FLUSH
OEM fluid only		 30K mi
MAP SENSORS
OEM only • Intake / before throttle body		 50K mi
PCV ASSEMBLY 50K mi
INJECTORS + CARBON CLEANING
Direct injection builds carbon. Do them on time.		 65K mi

Late Policy: If you schedule an in-person flash and arrive late without notice, a $50 fee applies. Reschedules must be made at least 1 hour prior.

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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Reviews

  • 5
    Stage 2 ECU, and got a TCU tune

    Posted by Mark M on Sep 8th 2025

    Very nice bang for ur buck tune! Definitely feel the difference, and runs without any problems. Launch control is addicting