APR 3.0T ECU Upgrade for the Audi B9 S4, S5, and SQ5

APR 3.0T ECU Upgrade for the Audi B9 S4, S5, and SQ5

APR’s ECU Upgrades are the best dollar-per-horsepower modification one can make to the 3.0T engine. 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. Once the ECU is unlocked, the software loads to the 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!

Each stage includes several adjustments and features to make the driving experience more enjoyable. APR has not only made the engine more powerful, but they’ve improved acceleration, removed the speed limiter, enabled left-foot braking or brake boosting, defaulted the auto start/stop system to “off”, properly rescaled the boost gauge, increased the stationary rev limiter, optimized thermal management and protection, designed the software to support normal bolt on modifications while not requiring any for the baseline configuration, and eliminated the need for a TCU upgrade to deliver maximum torque while still accurately reporting torque to the ECU.

APR Plus ECU Upgrade with a Limited Powertrain Warranty

The APR Plus ECU Upgrade is the first step towards making more power, and it includes their limited powertrain warranty. This simple upgrade requires no engine hardware modifications, and produces 431 HP with 467 FT-LBS of torque. Gains as high as 85 HP and 103 FT-LBS of torque are available throughout the power band, making the vehicle exceptionally quicker in all scenarios.

The APR Plus ECU Upgrade matches the performance of their Stage 1 ECU Upgrade (91 octane). To get even more power, you can add any of APR's other Stage 1 compatible products and still be covered under the APR Plus warranty! To learn more about APR Plus, please visit the APR Plus website.

If you're not interested in the APR Plus limited powertrain warranty, and want even more power, check out APR's other Stages.

APR Stage I ECU Upgrade

The APR Stage I ECU Upgrade is the first step towards making more power! This simple upgrade requires no engine hardware modifications, and produces 431-480 HP with 467-549 FT-LBS of torque depending on fuel grade. Gains as high as 85-123 HP and 103-176 FT-LBS of torque are available throughout the power band, depending on fuel grade and factory output, making the vehicle exceptionally quicker in all scenarios.

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

Please note, APR's E85 software is not a full flex fuel program. In this mode the engine is only designed to work on E85, as found directly at the pump, including both summer and winter blends from E60-E85. Using traditional pump fuels in this mode may result in engine damage. Do not manually blend with traditional pump fuel or race fuels or use race specific barrels of E85. To ensure proper E85 content levels, APR recommends using an E85 content sensor. Before using Ethanol, educate yourself and follow APR's switching guide.

Application Guide

  • Audi S4 (B9 and B9.5 / 8W): 3.0 TFSI EA839
  • Audi S5 (B9 / 8W): 3.0 TFSI EA839
  • Audi SQ5 (B9 / 80): 3.0 TFSI EA839

Pricing

  • APR Plus ECU Upgrade with an APR Plus Limited Powertrain Warranty: $2,299.99
  • APR Stage I ECU Upgrade $1,299.99

IMPORTANT PRICING AND AVAILABILITY DETAILS:

  • Pricing: Please contact an APR Importer for pricing outside the USA.
  • Availability and ECU Compatibility: Stages, programs, and features may not be available for all ECUs.
  • ECU Revision Notice: Multiple ECU revisions exist for each platform. APR software may be temporarily unavailable when factory updates are applied. An APR dealer can check availability in person, or over the phone if the ECU boxcode/revision is known.

For more information, visit www.goapr.com.

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