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

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!

After months of extensive research and development, that is typically absent from the aftermarket, APR's ECU upgrade makes the the 3.0 TFSI more powerful and more exciting than ever before! They have 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 their 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 APR created the newly fine-tuned calibrations available 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
• ECU REMOVAL REQUIRED
• Questions? Feel free to reach out to us
• The ECU is not opened or physically modified during the unlocking process