NO CORPORATE FILTER

Your B9 A4 & A5 isn’t slow. Audi’s factory programming is holding it back. This iE tune safely reprograms the engine computer, stripping away those limits and replacing them with a new, unchained personality. Experience savage acceleration and custom-coded performance tech that makes your A4 & A5 unhinged when you want it, and civil when you don’t.

424 HP DONE RIGHT 

424 HP DONE RIGHT 

Built and validated to perform anywhere you drive, then guarded by AutoProtect, our smart, automated engine protection system. Hard-hitting power is protected at all times.

INSTANT TUNE ADJUSTMENT

INSTANT TUNE ADJUSTMENT

Adjust crackles, launch RPM, throttle response, and more in real time. No reflashing. No hardware. Every tap delivers the driving experience you want.

FULL POWER, NO UNLOCK

FULL POWER, NO UNLOCK

Even with the transmission computer locked, you still get full power. iE’s custom torque management code keeps the engine and gearbox working together, unlocking maximum output without a transmission flash.

PROPER LAUNCH MODE

PROPER LAUNCH MODE

Factory low-RPM launch control just revs the engine. iE anti-lag launch builds real boost for tire-shredding launches, while Rolling Anti-Lag unleashes instant power from a roll.

ETHANOL MADE SIMPLE

Running ethanol in your tuned A4 & A5 unlocks massive power, but mixing and measuring is a hassle. iE TrueFlex solves that by adapting automatically to any ethanol blend. Just fill and go.

EASY MOBILE FLASHING

EASY MOBILE FLASHING

POWERlink Mobile lets you install and manage your tune suite wirelessly via our intuitive and effortless iPhone/Android mobile app. Meet the tuning guru in your pocket.

GAIN UP TO 424 HP

iE B9 A4 Tuning offers gains of up to 424 HP with hybrid turbo, or 378 HP on stock turbo. Unlike inferior tunes, we deliver power without spikes, twitchy hesitation, or clunky surprises. Acceleration pulls hard, throttle response is exact, and driving behavior is perfected for everyday use. Sophisticated when cruising. Brutal when you floor it.

GAIN UP TO 424 HP

FAST, NOT RECKLESS

This isn’t a rushed, custom dyno file or a conservative one-size-fits-all tune. iE calibrations are developed over months and validated across real cars, climates, and driving conditions worldwide. Advanced safety logic and AutoProtect intelligent programming continuously monitor each cylinder and pull power instantly if something isn’t right. You get massive power and torque from a tune that dials it back when you need it most.

FAST, NOT RECKLESS

FULL POWER, NO EXCUSES

All 2021+ and some 2019-2020 A4 & A5 transmission computers are locked. While most tuners reduce output or force “low-torque files,” iE wrote custom engine ecu code to force the transmission to safely accept more torque. This custom code increases hydraulic pressures to increase clutch capacity without a transmission tune. Full power, no compromises.

FULL POWER, NO EXCUSES

CUSTOMIZE YOUR SOUND

Turn on Exhaust Crackles to give your Audi A4 attitude with dramatic pops and burbles on decel and shifts. Make instant changes from the app to turn it up, tone it down, or switch it off in real time. Kill the drone or free the beast by controlling your exhaust flaps from the app. The sound you want, exactly when you want it.

CUSTOMIZE YOUR SOUND

NEVER WAIT ON BOOST

Other launch controls only build RPM, then fall straight into lag. iE Anti-Lag Launch Control builds RPM and spools the turbo, jumping you into the lead with hard-hitting, boosted launches. Rolling Anti-Lag (RAL) delivers the same advantage while moving, preloading boost at speed for a lag-free rolling launch. Stay one step ahead with instant RPM adjustments from the app or your cruise control stalk.

NEVER WAIT ON BOOST

ADJUSTABLE THROTTLE RESPONSE

Take command with 15 customizable settings ranging from calm and linear to sharp and immediate. Changes apply instantly from the app, so you can switch from economy to aggressive the moment you want it. One tune, multiple personalities. No expensive pedal control module needed.

ADJUSTABLE THROTTLE RESPONSE

TRUEFLEX: E85 MADE EASY

Ethanol is like rocket fuel for your B9 A4, but using it shouldn’t feel like a science project. iE TrueFlex adds real flex-fuel intelligence, reading ethanol content and instantly optimizing boost, timing, and power to safely deliver maximum performance for the exact fuel in your tank. 91/93 pump gasoline, full E85, or any blend in between–. just fill and drive.

BUILD GUIDE

Your path from stock to the ultimate A4, A5, or Q5
1

STAGE 1 — START HERE

Add up to +52 hp with nothing more than a Stage 1 ECU Tune, engineered to reprogram your stock engine for maximum gains on 91 or 93 octane. Pair with an intake for improved airflow and aggressive turbo sound. Available for 2017-2020 A4 & A5, the iE Transmission Tune transforms how the car shifts, accelerates, and delivers power, delivering a complete drivetrain performance upgrade.
INCLUDED WITH CORE, PRO, & APEX
2

STAGE 2 — TURN IT UP

To safely maximize the stock turbo, you’ll need an intake, intercooler, and downpipe. Reflash to Stage 2 and boost climbs to 378 hp. Increased airflow and cooling keep power consistent while acceleration pulls harder across the powerband. Pair with a catback exhaust to fully enjoy adjustable crackles.
REQUIRES PRO OR APEX
3

BIGGER TURBO — GO ALL OUT

Adding the bolt-on iE/Turbo Systems Hybrid turbo, HPFP Upgrade, 5 Bar Map Sensors, upgraded injectors, iE Stage 3 Map Pack, and iE Stage 3 TCU tune delivers up to 424 HP with a strong mid-range pull, effortless passing power, and maximum top-end performance.
REQUIRES APEX

Installation

Use the POWERlink Tuner and mobile app to retune your engine and unleash its full power.

POWERLINK MAKES IT EASY

POWERLINK MAKES IT EASY

A simple, step-by-step experience that makes flashing safe, clear, and stress-free.

LIVE GAUGES

LIVE GAUGES

Turn your phone into a customizable gauge cluster and monitor key engine data in real time.

DIAGNOSTICS

Read and clear trouble codes instantly and understand what your car is telling you.

DATA LOGGING

Record high-resolution engine data to review, share, or send directly to iE support.

DYNO CHARTS

TUNE SUITES

Each Tune Suite builds on the last by unlocking new power potential, advanced functions, fuel options, and hardware support.

SUITE FEATURES
Core Get Tuned
Pro Install Parts
APEX DOMINATE
POWERlink MOBILE
AUTOPROTECT
7000RPM LIMIT
FREE REVVING ENABLED
SPEED LIMITER DISABLED
BRAKE BOOST ENABLED
START/STOP MEMORY ENABLED
MMI TRUEBOOST
FREE LIFETIME SUPPORT
STAGE 1 MAPS
91 & 93 OCTANE
ADJUSTABLE HARDWARE SUPPORT
STAGE 2 MAPS
—
ADJUSTABLE EXHAUST CRACKLES
—
TRUEFLEX ETHANOL MAPS
—
VALET MODE
—
EXHAUST FLAP CONTROL
—
KICK DOWN DISABLE
—
FAN CONTROL
—
ADJUSTABLE ANTI-LAG LAUNCH CONTROL
—
—
ADJUSTABLE ROLLING ANTI-LAG
—
—
NO LIFT SHIFT (MT)
—
—
BOOST BY GEAR
—
—
ADJUSTABLE THROTTLE
—
—

COMPATIBILITY

YEAR MAKE MODEL ENGINE DRIVE
2017-2020 AUDI A4 2.0T AWD
2017-2020 AUDI A4 2.0T AWD
2017-2020 AUDI Q5 2.0T AWD
img FITMENT NOTES
  • 2021 and newer cars are updated EA888 Gen 4 engines and are not covered by this tuning suite. Please reach out to support to confirm fitment.
  • Some 2019 and 2020 cars have a newer transmission DL382G2 - these can be tuned on the engine side but transmission tuning support is currently not available
  • Compatible with Quattro models only - incompatible with front-wheel-drive (FWD) vehicles.

Frequently Asked Questions

How do I install the Audi B9 2.0T Stage 1 tune?

The Audi B9 A4 Stage 1 tune installs at home using the iE POWERlink V4 mobile flashing device. Connect to the OBD2 port and complete the EA888 Gen 3 longitudinal ECU upgrade directly from your iPhone or Android. No laptop, no ECU removal, no dealer visit required.

How much HP does the B9 2.0T tune add?

The iE B9 A4 performance tune increases output from the factory 252 HP to up to 424 HP, depending on fuel and hardware. These Audi B9 2.0T HP gains deliver stronger mid-range torque and significantly improved acceleration.

Do I need a TCU tune for B9 2.0T Stage 1?

Most 2021+ and some 2019–2020 models have a locked transmission computer. Our Audi B9 A4 Stage 1 tune includes custom torque management, allowing full advertised power without a B9 TCU unlock. If unlockable, adding the DSG tune improves shift speed and drivability.

Is tuning an Audi B9 safe for daily driving?

Yes. Our EA888 Gen 3 longitudinal tune is engineered for smooth, proportional power delivery. AutoProtect continuously monitors engine conditions and actively reduces power if unsafe activity is detected, maintaining reliable daily performance.

Do POWERlink adjustable features require extra hardware?

No. iE’s adjustable features are coded directly into the ECU. There are no external modules, pedal boxes, or add-on controllers required. All changes are made live through the POWERlink app and apply instantly.

Can I really switch from 93 octane to E85 without reflashing?

Yes. The B9 A4 E85 flex fuel tune is available with iE TrueFlex hardware and fueling upgrades. The ECU automatically adjusts for ethanol content in real time, allowing you to run 91, 93, or full E85 without reflashing.

Will tuning hurt my fuel economy?

Our calibrations are optimized for performance, but many drivers report stock-like or even improved fuel economy during normal cruising. Increased efficiency in boost and ignition mapping can improve MPG when driving conservatively. Aggressive driving will always use more fuel.

Do I need to repurchase tunes when upgrading parts?

No. POWERlink Pro and Apex Suites include all supported files within your tier. Upgrade hardware and flash the appropriate file — no additional software purchases required.

Is this mobile ECU flashing for Audi B9?

Yes. Audi B9 A4 mobile flashing is done entirely through the iE POWERlink app. This eliminates laptops and dealer visits while giving you full control from your phone.

Why choose iE POWERlink over other B9 2.0T tuning options?

It comes down to control, refinement, and technology. Many off-the-shelf tunes are conservative and locked. Custom tuning often requires weeks of revisions with limited feature support. iE POWERlink delivers professional-grade calibration, advanced safety systems, and in-runtime adjustable features you control instantly from your phone. It’s not just a tune. It’s a live ECU platform.

What is required for Stage 3?

iE B9 A4 Apex Tier, Stage 3 Map Pack Engine Tune and Stage 3 TCU Tune are mandatory to run this turbo safely and correctly on your Longitudinal EA888 Gen 3. For hardware, you will need the iE/TurboSystems Turbocharger, upgraded air intake, 5 Bar map sensors, intercooler, and VW Golf R injector upgrade (X4 injectors VW PN: 06K906036N and X4 injector clips VW PN: 06J133036F).

See iE Stage 3 Map Pack for more info.

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FROM THE SMALLEST DESIGN DETAILS TO CUSTOMER CARE, WE OBSESS OVER EVERY PART OF YOUR EXPERIENCE.

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128 Reviews
Reviewed by Andrew M.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

Very satisfied!

This is my second A5. The first one was tuned by a competitor. I decided to go with IE on this one and I'm very glad I did! The difference is huge! I bought the TCU tune as well. I plan on going stage 2 TrueFlex E 40-60 as soon as all the corresponding parts are installed.

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Reviewed by Nathan B.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

2018 a5 sportback Stage 1 Pro ECU/TCU Tunes

Makes a huge difference over stock. I have a buddy that works at ECS that recommended IE for tuning. I went with stage 1 pro ecu and tcu tune, flashed the high torque profile as well. When i want to have fun its instant, the shifting is way smoother and your car doesnt try and immediately find the highest gear it can anymore. My gas mileage has also increased over stock numbers if im driving gently. I can average 31mpg city driving on my ***** to and from work.

Going stage 2 later on but so far, 10/10

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Reviewed by Nick B.
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I recommend this product
Rated 5 out of 5
Review posted

Stage 1 insane!!

I usually never write reviews. In fact, this is my first ever. But I genuinely can't stop myself from writing this review. To put it simply, if you have the money, buy it. To lengthen the response a bit, it changes the car from a dad mobile to a baby supercar. I'm one to be pretty harsh about what "feels fast" to me, like if it's just visually fast, so what. But if your head gets pulled back, that's where it's fun. And this tune does just that! Granted, not as much as a supercar, but still genuinely impressive, hence me stating it's like a baby supercar. And all that is just stage 1! Can't wait until I get all the parts in for stage 2.

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Reviewed by Tyler
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

Great tune

The tune is amazing alout faster now have no problem with it

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Reviewed by Maddix
I recommend this product
Rated 5 out of 5
Review posted

5 Stars

Very good product, the flash tune on my phone did fail twice so I just switched over to using a laptop and then it went super smoothly so I recommend using a laptop once you get it

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