APR Stage 1 ECU Upgrade for 3.0T Audi B9 S4, S5, and SQ5

  • APR Stage 1 ECU Upgrade for 3.0T Audi B9 S4, S5, and SQ5 (DPP-30T-MG1)
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$1,444.95 $1,299.99
(You save $144.96)
1.00 LBS
APR products from etektuning.com can only be sold and shipped within the United States.
Calculated at checkout
Contact Eurotek Tuning to schedule installation of software:

AUDI PERFORMANCE PARTS: APR Stage 1 ECU Upgrade for 3.0T Audi B9 S4, S5, and SQ5

Product Details: 

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. 

Auto Start Stop OFF:
APR has defaulted the Auto Start Stop system to the off position. Just click the button to turn it on!

Acceleration Enhancements:
Beyond horsepower and torque enhancements, APR’s Calibration Engineers were able to increase the acceleration rate of the vehicle through other calibrations changes. Ignition delay is reduced resulting in a more responsive pedal without altering overall throttle sensitivity. Furthermore, throttle lag commonly noticed at slow speeds and while reapplying throttle has been reduced. 

Speed Limiter:
APR’s ECU upgrade increases the vehicle's top speed limiter for blistering sprints around the track or across the Autobahn without the speed limiter shutting down the fun.

Left Foot Braking:
APR's Left Foot Braking feature allows more control over the vehicle’s throttle. The factory equipped vehicle's throttle input is disabled while pressing the accelerator and brake at the same time. Left Foot Braking, a common motorsport driving technique, allows the driver complete control over the vehicle’s throttle and braking system, which may give the vehicle the edge it needs at the track.

Increased Fuel Economy:
APR’s Calibration Engineers paid close attention to several parameters directly related to fuel economy, especially while cruising at highway speeds. Depending on driving style and fuel quality, better miles per gallon may be achieved.


  • 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

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