APR S4, S5, and SQ5 ECU Upgrades are here

By: APR | 03/27/2020 < Back to Blog Home

We’re excited to announce our Engine Control Unit (ECU) Upgrades are now available for the Audi S4, S5, and SQ5 (B9) 3.0 TFSI engine with the Bosch MG1 ECU! Expect massive gains with up to 431-480 HP and 467-549 FT-LBS of torque on tap, depending on octane, from this simple software upgrade. Additionally APR Plus is available with 431 HP and 467 FT-LBS and comes with a factory term limit matching limited powertrain warranty!


Our new suite of MG1 ECU software comes after months of extensive research and development that is typically absent from the aftermarket. Our upgrade makes the engine more powerful and more exciting. We’ve extensively calibrated the system to work flawlessly on the track, while retaining safety routines to protect your engine in the most demanding scenarios. This was all made possible by our engineering team’s pursuit of perfection. Development vehicles were outfitted with additional sensors, including turbo shaft speed sensors, thermocouples, transducers, and more, along with our high speed direct RAM logging equipment, to feed valuable data to the team for analysis. After thousands of hours of testing and tuning we created new calibrations that are fine tuned for several octanes, including ethanol, and contain hundreds of map changes, with a vast array of safety features built in.

Features and Benefits:

  • Delivers up to 431-480 HP with 467-549 FT-LBS depending on octane
  • Max gains of +123 HP and +179 FT-LBS on E85
  • Supports 91 AKI, 93 AKI, 100 AKI, 104 AKI, and E60-E85 Ethanol fuel grades
  • Quicker acceleration
  • Speed limiter removed
  • Left-foot braking / brake boosting added
  • Auto Start/Stop defaulted to “off”
  • Properly rescaled boost gauge
  • Optimized thermal management and protection
  • No hardware required (Software only)
  • Supports standard bolt on modifications
  • Eliminated the need for a TCU upgrade to achieve full torque
  • Optional limited powertrain warranty
  • Free lifetime updates
  • 30 day money back guarantee

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