APR ECU Upgrade - 2.5T EA855 EVO

Unlock hidden horsepower and torque with our performance tuning software for your vehicle's Engine Control Unit (ECU).

PART# ECU-25T-EA855-EVO

Overview

APR's ECU Upgrades are the best dollar-per-horsepower modification one can make to improve engine performance. The upgrades dramatically increase horsepower and torque, making for an exceptionally quicker and more exciting vehicle. This is made possible through APR's optimization of the factory engine management system to take full advantage of the engine's capabilities, without needing any end user adjustment. The ECU Upgrades are available with various features and supported octane levels and each stage is compatible with most typical bolt-on modifications. The software is installed to the vehicle's factory ECU through the OBD-II port, resulting in a clean and headache-free install. Furthermore, for those looking for tuning with a limited powertrain warranty, APR Plus has you covered!

Features:

  • Horsepower - More horsepower throughout the whole rpm band
  • Torque - More torque throughout the whole rpm band
  • Warranty - APR Plus is available, providing a factory term limit matching limited powertrain warranty
  • Program Switching - Change programs and access features with your cruise control stalk
  • APR Mobile - Change programs and access features with your smart device
  • Valet Mode – Neuters the vehicle, giving the driver minimal output
  • Anti-Theft – Password protects driving the vehicle
  • Security Lockout – Password protects program switching
  • Fault Code Erase – Resets ECU fault codes and adaption on the fly
  • Stages - Multiple performance levels depending on installed hardware
  • Low Grip - Multiple profiles designed to enhance launching in low and high grip situations
  • Fuel Grades - Multiple octanes from which to choose
  • Ethanol - Ethanol support from E60-E85 for maximum performance
  • Acceleration - Accelerate faster with more power and reduced throttle lag
  • Linear Throttle - Pedal maps adjusted for a more linear feel
  • Brake Boosting - Left foot braking or brake boosting added
  • Rev Limiter - Increased redline for higher revving
  • Standing Limiter - Increased standing limiter for higher revving at idle
  • Speed Limiter - Go as fast as you want with the speed limiter out of the way
  • Motorsport Limiter - With the soft limiter removed, you’ll get full power right up to the hard, “bap bap bap” redline fuel cut
  • Auto Start/Stop Inversion - Auto Start/Stop defaults to the off position
  • Exhaust Crackle - Multiple exhaust crackle profiles including factory, mild, and aggressive all with mode switching and component protection
  • Exhaust Flaps - Enhanced power delivery and drivability through recalibrated exhaust flap actuation
  • Added Safety - Additional safety features and protection modes added
  • Boost Gauge - The factory boost gauge displays accurate boost and reacts more quickly
  • Power and Torque Gauges - The factory power and torque gauges are accurately rescaled
  • Optimized Cold Start - Stage 2 features an optimized cold start that will surely please your neighbors
  • Economy - While cruising, or driving normally, your fuel economy may benefit from our optimized calibration
  • Direct Port Programming - Clean and easy install through the OBD II port without removing the ECU
  • Free Updates - Get free updates for life
  • Guarantee - 30 day money back guarantee

Specs

BrandAPR
Engine AspirationTurbocharged
Engine ConfigurationI5
Engine Displacement2.5L
Engine FamilyEA855 EVO
Engine OrientationTransverse
Fuel TypeGasoline
MarketNAR
ROW
Product TypeECU Upgrade
Part NumberECU-25T-EA855-EVO

APR ECU Upgrade Stages

APR’s ECU Upgrades are available in multiple octanes levels. Each stage is fully compatible with an upgraded intake, catback exhaust, or other minor bolt on modifications. Each stage includes optimizations to the factory boost gauge making it react more quickly and corrections to the power and torque gauges to match the increased output. Furthermore, we’ve added left foot braking, removed the speed limiter, raised the rev-limiter and added a motorsport limiter, reenabled the exhaust crackle on modelse where it was removed (2019+), adjusted the factory exhaust crackle to protect the catalyst on Stage 1 and 1+ and enabled in more scenarios on Stage 2, optimized cold start, retuned the exhaust flap actuation for the best performance and sound in multiple modes, optimized high altitude mappings, retuned the throttle for better response, and completely optimized the driving experience for street and track use making for a much more enjoyable driving experience!

APR Plus

The APR Plus ECU Upgrade includes a factory term limit matching limited powertrain warranty, and is the first step towards making more power! This simple upgrade requires no engine hardware modifications and produces 459 HP with 451 FT-LBS of torque. To get more power, the vehicle can be outfitted with an upgraded intake, intercooler, catback exhaust, and various other bolt-on modifications all without requiring any new modifications to the ECU.


APR Plus is available for 91 AKI and is only available in the USA.

APR Stage 1

The APR Stage 1 ECU Upgrade is the first step towards making more power! This simple upgrade requires no engine hardware modifications and produces 459-542 HP with 451-500 FT-LBS of torque. To get more power, the vehicle can be outfitted with an upgraded intake, intercooler, catback exhaust, and various other bolt-on modifications all without requiring any new modifications to the ECU. This stage has optional high and low grip modes designed to reduce wheel spin and aid in 60 FT and 0-60 times depending on surface prep. APR recommends NGK heat range 9 (NGK-R7437-9) spark plugs gapped to 0.024" ±0.002" or 0.6mm ±0.05mm with a change interval of 10-15,000 mi or 16-24,000 km.


APR Stage 1 is available for 91 AKI, 93 AKI, 100 AKI, 104 AKI and E60-E85 Ethanol in North America, and 95 RON, 98 RON, 102 AKI, 104 AKI, 108 AKI and E60-E85 Ethanol in the Rest of the World.

APR Stage 1 Plus

The APR Stage 1+ ECU Upgrade is the next step towards making more power! This simple upgrade requires the APR Turbo Inlet System, intercooler and no other engine hardware modifications and produces 493-569 HP with 454-520 FT-LBS of torque. To get more power, the vehicle can be outfitted with an upgraded intake, catback exhaust, and various other bolt-on modifications all without requiring any new modifications to the ECU. This stage has optional high and low grip modes designed to reduce wheel spin and aid in 60 FT and 0-60 times depending on surface prep. APR recommends NGK heat range 9 (NGK-R7437-9) spark plugs gapped to 0.024" ±0.002" or 0.6mm ±0.05mm with a change interval of 10-15,000 mi or 16-24,000 km.


APR Stage 1+ is available for 91 AKI, 93 AKI, 100 AKI, 104 AKI and E60-E85 Ethanol in North America, and 95 RON, 98 RON, 102 AKI, 104 AKI, 108 AKI and E60-E85 Ethanol in the Rest of the World.

APR Stage 2

The APR Stage 2 ECU Upgrade is the next step towards making more power! This simple upgrade requires an exhaust system, turbo inlet system, intercooler and no other engine hardware modifications and produces 493-569 HP with 454-520 FT-LBS of torque. RHD vehicles without the turbo inlet will experience reduced output. To get more power, the vehicle can be outfitted with an upgraded intake, and various other bolt-on modifications all without requiring any new modifications to the ECU. This stage has optional high and low grip modes designed to reduce wheel spin and aid in 60 FT and 0-60 times depending on surface prep. Additionally this stage is available with optional exhaust crackle modes. The more aggressive modes increase the length, duration, intensity, and operating modes of the exhaust crackle. APR recommends NGK heat range 9 (NGK-R7437-9) spark plugs gapped to 0.024" ±0.002" or 0.6mm ±0.05mm with a change interval of 10-15,000 mi or 16-24,000 km.


APR Stage 2 is available for 91 AKI, 93 AKI, 100 AKI, 104 AKI and E60-E85 Ethanol in North America, and 95 RON, 98 RON, 102 AKI, 104 AKI, 108 AKI and E60-E85 Ethanol in the Rest of the World.

APR Stage 3

The APR Stage 3 ECU Upgrade is the next step towards making more power! This stage is available for multiple setups, and are all designed around using a drop-in turbocharger upgrade. Stage 3 has specific software for the TTE700 and GTX3582 drop-in turbo upgrades. Both require a APR TCU Upgrade, exhaust system, 980cc port injectors, turbocharger inlet system, intercooler, and NGK heat range 9 (NGK-R7437-9) spark plugs gapped to 0.024" ±0.002" or 0.6mm ±0.05mm with a change interval of 10-15,000 mi or 16-24,000 km. The TTE700 requires the included wastegate actuator. The GTX3582 requires the included turbosmart wastegate actuator and MAC 3-port solenoid. A proper 500 LPH+ @ 6 bar LPPF is required to run E85. The TTE700 produces 576-713 HP with 523-536 FT-LBS of torque. the GTX3582 produces 581-740 HP with 511-555 FT-LBS of torque. RHD vehicles without the turbo inlet will experience reduced output. In all cases, torque is kept flat to aid in component longevity. This stage has optional high and low grip modes designed to reduce wheel spin and aid in 60 FT and 0-60 times depending on surface prep. Additionally this stage is available with optional exhaust crackle modes. The more aggressive modes increase the length, duration, intensity, and operating modes of the exhaust crackle. APR recommends NGK heat range 9 (NGK-R7437-9) spark plugs gapped to 0.024" ±0.002" or 0.6mm ±0.05mm with a change interval of 10-15,000 mi or 16-24,000 km.


APR Stage 3 is available for 91 AKI, 93 AKI, 100 AKI, 104 AKI and E60-E85 Ethanol in North America, and 95 RON, 98 RON, 102 AKI, 104 AKI, 108 AKI and E60-E85 Ethanol in the Rest of the World.

Horsepower and Torque Dyno Charts

Select a DynoSelect a Dyno Type
25tfsi_ea855_evo_s0_vs_s1_91_c.png

APR Calibration Report

StageHPTQMax GainMax Gain
Stock As Reported by VAG 394 HP354 FT-LBS
Stock As Measured by APR 420 HP 372 FT-LBS
APR Plus
91 AKI459 HP 451 FT-LBS +66 HP +88 FT-LBS
APR Stage 1
91 AKI / 95 RON459 HP 451 FT-LBS +66 HP +88 FT-LBS
93 AKI / 98 RON476 HP 470 FT-LBS +86 HP +108 FT-LBS
102 RON491 HP 475 FT-LBS +98 HP +112 FT-LBS
100 AKI / 104 RON516 HP 498 FT-LBS +106 HP +137 FT-LBS
104 AKI / 108 RON524 HP 506 FT-LBS +113 HP +146 FT-LBS
E85542 HP 500 FT-LBS +132 HP +134 FT-LBS
APR Stage 1+
91 AKI / 95 RON493 HP 454 FT-LBS +86 HP +96 FT-LBS
93 AKI / 98 RON513 HP 480 FT-LBS +104 HP +116 FT-LBS
102 RON528 HP 485 FT-LBS +116 HP +121 FT-LBS
100 AKI / 104 RON533 HP 510 FT-LBS +125 HP +144 FT-LBS
104 AKI / 108 RON541 HP 518 FT-LBS +132 HP +152 FT-LBS
E85569 HP 520 FT-LBS +162 HP +152 FT-LBS
APR Stage 2
91 AKI / 95 RON499 HP 468 FT-LBS +92 HP +113 FT-LBS
93 AKI / 98 RON519 HP 496 FT-LBS +110 HP +134 FT-LBS
102 RON529 HP 490 FT-LBS +120 HP +125 FT-LBS
100 AKI / 104 RON540 HP 512 FT-LBS +131 HP +147 FT-LBS
104 AKI / 108 RON548 HP 520 FT-LBS +140 HP +156 FT-LBS
E85574 HP 530 FT-LBS +165 HP +165 FT-LBS
APR Stage 3 TTE700
91 AKI / 95 RON576 HP 512 FT-LBS +162 HP +145 FT-LBS
93 AKI / 98 RON596 HP 523 FT-LBS +182 HP +158 FT-LBS
100 AKI / 104 RON682 HP 526 FT-LBS +269 HP +202 FT-LBS
104 AKI / 108 RON694 HP 531 FT-LBS +280 HP +210 FT-LBS
E85713 HP 536 FT-LBS +294 HP +221 FT-LBS
APR Stage 3 GTX3582R
91 AKI / 95 RON581 HP 511 FT-LBS +164 HP +145 FT-LBS
93 AKI / 98 RON601 HP 523 FT-LBS +187 HP +158 FT-LBS
100 AKI / 104 RON707 HP 544 FT-LBS +295 HP +221 FT-LBS
104 AKI / 108 RON720 HP 549 FT-LBS +306 HP +230 FT-LBS
E85740 HP 555 FT-LBS +321 HP +241 FT-LBS
Only use fuel equal to or higher than specified. Never use a lower octane fuel. Always follow our fuel guide, especially with race fuel and Ethanol, where available. Dynos are for reference only. Results will vary. Contributing factors include the vehicle condition, vehicle setup, dyno type, dyno setup, environmental factors, fuel quality, and more. When describing fuels, the North American Region (NAR) uses the Anti-Knock Index (AKI), (RON+MON)/2, or (R+M)/2. The Rest of the World (ROW) uses RON. RON is Research Octane Number and MON is Motor Octane Number.

Program switching allows you to access additional program modes and features from your cruise control stalk or your smart device with APR Mobile. Depending on the ECU, available memory, and selected options, up to four program modes and all features, can be installed.


  • Stock Mode - Go back to the stock power levels.
  • Performance Modes - Switch between octanes and program modes.
  • Valet Mode - Neuters the vehicle, giving the driver minimal output.
  • Security Lockout - Password protects program switching.
  • Anti-Theft - Password protects driving the vehicle.
  • Fault Code Erase - Resets ECU fault codes and adaptation.

APR Mobile

APR Mobile installs on smartphones, tables and other devices, and connects wirelessly to your ECU. The app can then be used to access features such as program switching, fault code reading and resetting, and high speed data logging.

Extreme Testing

APR’s ECU Upgrade has been full tested for the better part of a year prior to a public release. This includes summer and winter weather testing on multiple continents, high and low altitude testing, extensive track testing at multiple road courses, extensive drag strip testing and extensive road and daily driving testing. APR’s test vehicles are full instrumented with multiple sensors, including pre and post intercooler temperature and pressure sensors, pre and post turbine temperature and backpressure sensors, pre and post catalyst temperature and pressure sensors, and multiple pressure sensors throughout the intake system. APR test vehicles have seen over 700 HP in various configurations, on the stock engine internals, and have set multiple world records, including 10.5 second stage 1 quarter mile passes, and 9 second stage 3 passes.

The APR Difference

Who we are - We’re a global automotive engineering firm nestled in Opelika, Alabama. Our 80,000ft² state-of-the-art facility is home to some of the best engineers in the industry, who have mastered hundreds of engine management systems. We have multiple engine and chassis dynos, and the resources necessary to create our ECU Upgrades in-house, from the ground up! We're not a new company either. We've been around since the 90's and we have a strong financial backing to ensure we'll be here to support you for decades to come!


What we do - We optimize everything to make your engine more powerful. We adjust air-fuel ratios, advance ignition, increase boost pressure, alter cam positions and lift profiles, and more, all depending on the type of engine and management system, of course! We don’t take shortcuts, and we don’t take risks. We do it the right way.


How we differ - With our proprietary calibration and direct ram access data logging tools and operating system code changes, we’re able to make some of the strongest and fastest ECU upgrades, without needing costly end user adjustments. We work with the ECUs intelligent modeling and closed-loop systems, and beta test in multiple environments to create upgrades that work no matter where you drive!

APR Software Pricing Guide

Our performance software upgrade is available in multiple stages with optional features.

APR Plus
APR Plus ECU Upgrade$1,399.95
APR Stage 1
APR Stage 1 ECU Upgrade$699.95
APR Stage 1 ECU Upgrade from APR PlusFREE
APR Stage 1+
APR Stage 1+ ECU Upgrade$699.95
APR Stage 1+ ECU Upgrade from APR Plus or Stage 1FREE
APR Stage 2
APR Stage 2 ECU UpgradeDISCONTINUED
APR Stage 2 ECU Upgrade from APR Plus, Stage 1, or Stage 1+DISCONTINUED
APR Stage 3
APR Stage 3 ECU Upgrade$1,049.95
APR Stage 3 ECU Upgrade from APR Plus, Stage 1, or Stage 1+$349.95
APR Stage 3 ECU Upgrade from APR Stage 2$179.95
Optional Features
Program Switching$99.95

Purchasing, Guarantee, and Updates

How to Purchase - APR Software Upgrades are only available through Authorized APR Dealers. The dealer will connect to your vehicle, and install the update.¹


Money-Back Guarantee - Try our Software Upgrades for up to 30 days, risk free! If you are not satisfied, return to an APR Dealer to have it removed and refunded.²


Free Updates - If we make an update, add a standard feature, or if the manufacturer issues an update, you are entitled to a free update.³


1. APR Software may not be available for all vehicles. Stages, programs, and features may not be available for all ECUs.
2. Excludes some Software Upgrades, such as those included with a hardware purchase. Labor charges are at the discretion of the installer.
3. Subject to availability. Labor charges are at the discretion of the installer. Applicable to the original purchaser. Second hand owners may inquire with an APR Dealer about a software license transfer fee.

Tech Resources

Important fuel quality information
Important fuel quality information
Find your boxcode and revision
Find your boxcode and revision
Program switching guide
Program switching guide
APR Plus Warranty Booklet
APR Plus Warranty Booklet
Only use fuel equal to or higher than specified. Never use a lower octane fuel. Always follow our fuel guide, especially with race fuel and Ethanol, where available. Dynos are for reference only. Results will vary. Contributing factors include the vehicle condition, vehicle setup, dyno type, dyno setup, environmental factors, fuel quality, and more. When describing fuels, the North American Region (NAR) uses the Anti-Knock Index (AKI), (RON+MON)/2, or (R+M)/2. The Rest of the World (ROW) uses RON. RON is Research Octane Number and MON is Motor Octane Number.

Applications

*Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages.

Some parts are not legal for use in California or other states with similar regulations.