Unitronic 8Y Audi RS3 2.5T TSI Performance Software

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Part# UNI-8Y-RS3-OECU-Stage-1-None

Important Fitment Note:
Does Not Support 2025+ (8Y.5) Models


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Unitronic FLEX fuel enabled ECU Performance Software Calibrations are available for this platform allowing for seamless transitions between 100% gasoline to 85% ethanol and anything in between, without requiring an ECU reflash. This FLEX enabled Software is available for an additional fee and it covers all lower stages up until your highest purchased stage as well. UniFLEX Hardware is required in order to take advantage of these FLEX enabled calibrations. Please contact Unitronic or your local Authorized Dealer to learn more.

Unitronic Advanced Features (UAF) are also available for this platform. Thanks to proprietary ECU code, the Unitronic Advanced Features (UAF) Add-On gives unparalleled levels of control over Pops and Bangs, Launch Control Settings and Rolling Launch Control for true adjustability directly from the driver’s seat.

The 8Y RS3 was one of the first platforms to arrive equipped with the new
Bosch® H80 MG1CS163 ECU hardware, which is a highly sophisticated controller, that introduced new challenges in not only finding a solution to gain access to reflash the new ECU hardware, but also get oriented with the new strategies found in this new MG1CS163 ECU type, while simultaneously introducing new innovation features and solutions.

  • STOCK
    • 437 HP / 382 LB-FT
  • STAGE 1
    • 91oct : 514 HP / 482 LB-FT
    • E85 : 624 HP / 528 LB-FT
  • STAGE 1+
    • 93oct : 561 HP / 498 LB-FT
  • STAGE 2
    • 91oct : 531 HP / 490 LB-FT
    • 93oct : 565 HP / 506 LB-FT
    • E85 : 638 HP / 534 LB-FT

Features 

  • Engineered with Strict Industry Standards
    With over 10 years of experience with Bosch and Siemens engine management systems and calibrations, Unitronic is able to utilize its expertise, industry leading tools and equipment to ensure an optimal calibration; delivering maximum performance, while maintaining complete OEM-like reliability and drivability.
  • Extensively Tested Under Various Driving Conditions
    Development begins using Unitronic’s in-house Maha Chassis dyno housed in an environmentally controlled cell; closely monitoring a plethora of operational data, utilizing industry leading calibration tools and resources. Beta calibrations are then tested in street and track scenarios, using multiple cars under various driving conditions. This engine calibration strategy ensures Unitronic Performance Software delivers maximum performance, OEM-like drivability and reliability anywhere in the world. Unitronic Performance Software is only released to its Clients once development is thoroughly completed in accordance to Unitronic’s strict standards.
  • Factory Safety Limiters Retained
    OEM “fail safes” are retained within the ECU calibration. Close monitoring of all operation parameters ensures that engine operation stays within factory components limits, resulting in reliability.
  • Optimized Responsiveness, Smoothness, Drivability, and Comfort
    Unitronic’s ECU calibrations are engineered to improve engine response and reduce low-end lag. Unitronic’s Performance Software has gained worldwide recognition and is well known for its broad powerband, with smooth power delivery, maximizing responsiveness and “area under the curve”, under normal and hard acceleration.
  • Optimized Maximum Output
    Unitronic’s ECU Calibrators deliver the maximum power output while staying within the operational limits of the factory engine and drivetrain components. Specifically, this results in the highest engine performance without sacrificing the reliability of the engine, turbocharger, or other engine and drivetrain components.
  • Power Delivery Perfectly Optimized Throughout the Power Band
    Aligned with the OEM strategy, the calibration is designed to offer a large flat torque plateau to provide a smooth and linear power band. Maximum torque output is achieved sooner and maintained longer which creates a broader torque plateau and greater area under the curve. This results in an improved acceleration and optimal engine operation.
  • Improved Fuel Efficiency
    Optimized timing and injection in cruising condition allows for an improved fuel efficiency, under normalized driving conditions.
  • Ignition Timing Precisely Calibrated for Higher Octane Fuel
    Engine calibration optimized to take advantage of higher fuel quality to extract maximum energy from the combustion. Therefore, when using a higher octane fuel, more power and better fuel efficiency will be achieved.
  • Speed Governor Removed
    Vehicle speed limiter within ECU is removed. (Subject to transmission rotational speed limit.)

 



Unitronic Software Engineers quickly developed an ECU unlock solution, but due to the unique nature of these new H80 MG1 ECUs, Unitronic requires ECUs to be sent to its Headquarters for unlock operations to be performed. With over 20 years of experience in this market, it was evident that some customers would not want any downtime associated with the ECU unlocks, so Unitronic is happy to offer three options regarding the ECU Unlock, in efforts to offer a variety that will suit everyone's preferences.


HOW UNLOCK METHODS WORK:

  • Send in Orignal ECU for Unlock
    • Send your ECU to Unitronic for Unlock
    • We supply shipping labels
    • Expect 5-10 Business Day Turn around
  • Core Exchange
    • Replacement ECU shipping to you while Unitronic has your ECU to unlock and tune.
    • $1750 Refundable fee (included in price option already)
    • Expect Next Day Shipping for Replacement ECU
    • 5-10 Business Day Turn around for Tuned ECU
  • Replacement ECU
    • This involves a brand new ECU that is already tuned and unlocked being sent straight to you
    • Expect Next Day Shipping
    • Keep your original one stock 

UNIFLEX:

Unitronic is proud to be the first to implement native, true, flex fuel code to the factory Bosch MG1CS163 ECU called UniFLEX. Unitronic’s UniFLEX Hardware allows for a plug and play installation through its proprietary UniFLEX Module and a genuine Continental Ethanol Sensor with required fittings and harnesses.

NOTE: The 8Y RS3 uses Unitronic’s UH012-FLA or UH013-FLA UniFLEX hardware kits.

When combined with Unitronic’s UniFLEX-enabled Performance Software Add-On, the factory Bosch MG1CS163 ECU receives ethanol content over the CAN-bus and utilizes this fuel composition data to blend mapping of timing, boost pressure, fueling, and much more completely on-the-fly. This allows for seamless transitions from 100% gasoline to 85% ethanol and anywhere in between, without needing an ECU reflash.

UniFLEX is also Bluetooth® enabled, allowing for wireless connectivity with iOS and Android mobile devices using the Unitronic UniE85 Manager App.

UNITRONIC ADVANCED FEATURES (UAF):

Adding even more to the magnitude of this project, Unitronic is proud to introduce its Advanced Features. Thanks to the proprietary ECU code, the Unitronic Advanced Features (UAF) Add-On gives unparalleled levels of control for true adjustability directly from the driver’s seat.

Exhaust Overrun (Pops and Bangs)

  • Adjustable Drive Mode based PnB (Enabled in Dynamic & Performance modes)
  • 3 levels of duration (Off, Short, Long)
  • 3 levels of intensity (Low, Medium, High)

Adjustable Launch Control

  • 8 Adjustable RPM Setpoints (4000-5400)
  • 3 adjustable boost levels (Low, Medium, High)

Rolling Launch Control

  • User adjustable RPM setpoint
  • 3 adjustable boost levels (Low, Medium, High)

AVAILABLE HARDWARE

Unitronic’s high-performance hardware for the 8Y RS3 is engineered to deliver maximum power and efficiency in a direct, bolt-on package.

From our tried-and-true 4” Carbon Fiber Intake to our Performance Downpipe equipped with a GESi 5” G-Sport Ultra High Output UHO+ 400cpsi Catalytic Converter and even our upcoming 4" Turbo Inlet Elbow made specifically for the 8Y RS3, each component is engineered for seamless installation and real-world performance gains. Our popular Intercooler Upgrade keeps intake air temps in check for both factory and hybrid turbochargers while our Dogbone Mounts help improve traction while eliminating drivetrain slop.

Whether you're chasing lap times or enhancing your daily driver, Unitronic Performance Software and Hardware gives your 8Y RS3 the performance edge it deserves — and we're not done yet. Stage 3 offerings and more are still in the works!

Required Hardware

Recommended Hardware

Related Hardware

Oil and Additives Recommendation

Unitronic uses and recommends Liqui Moly Oil & Additives exclusively for your vehicle, which meet Audi/VW approvals. To ensure your vehicle is maintained with the #1 oil brand in Germany, see what is recommended for you with the
Liqui Moly Oil Guide.





⚠️CALIFORNIA WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Does Not Support 2025+ (8Y.5) Models

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