APR 2.5L ECU Upgrade

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APR's tuning program for the Rabbit, Beetle and Jetta 2.5l presents new technologies and features found for the first time in APR's calibration program. APR's Engineering Team has spent numerous hours disseminating the Motronic Engine Management System to unlock new features in ECU customization and provide new options to further enhance the driving experience.

New Features Include:

  • Maximum Engine Speed Limit Raised to 6500 RPM
  • Left-Foot Braking Enabled for Simultaneous Throttle and Accelerator Input
  • Idle Raised to 750 RPM for Smoother Idle and Easier Initial Acceleration
  • Raised Standing Engine Speed Limit To 6500 RPM
  • Recalibrated Engine Braking Assist to Remove Overrun Hang
  • Speed Limiter Removed
  • Air-Fuel Ratio Calibrated for Maximum Power and Torque Delivery at Wide Open Throttle and Calibrated for Maximum Fuel Economy during Part Throttle Operation

Software Functions

  • APR's Patented DirectPort Programming Technology
  • APR's EMCS Functionality
  • Fault Code Erase/Throttle Body Alignment
  • Security Lockout
  • Anti-theft


  • Exact OEM Calibration Stock Mode
  • 91 Octane Performance Mode
  • 93 Octane Performance Mode
  • Valet Mode

Dyno Performance

Power Highlights
OctanePeak HPPeak TQPeak HP GainPeak TQ Gain
91 Octane 180 HP 201 TQ 10 HP @ 6000 RPM 12 TQ @ 4000 RPM
93 Octane 181 HP 204 TQ 12.4 HP @ 4250 RPM 15.3 TQ @ 4250 RPM

APR's ECU Upgrade is developed to work within the OEM and Tier 1 Supplier specifications for engine component stress tolerances and performance specifications. APR's ECU Upgrades are available in octane specific versions to allow you to take full advantage of the fuel quality available in your area. APR's patented EMCS functionality puts the control of the engine's operation at your finger tips and allows for additional features and options to be installed to your OEM ECU.

Stage I ECU Upgrade

Free Trial Software Yes
Calibrations Stock, 91 Octane, 93 Octane and Valet
Required Hardware None to Meet Advertised Results
Recommended Hardware APR/Carbonio Intake

Stage II ECU Upgrade

Free Trial Software Yes
Upgrade Incentives Existing APR ECU Upgraded Customers may Upgrade for Free
Calibrations Stock, 91 Octane, 93 Octane and Valet
Required Hardware Testpipe or High Flow Catalytic Converter
Recommended Hardware APR/Carbonio Intake


Application Guide
YearVehicleEngineOption91 Octane Chipped93 Octane ChippedPrice 
¹Some 2006 models. Due to many ECU variations, check with APR about software availability.
²Primarily 170HP 2.5L engine with MAF sensor. Some 150hp models are applicable. Due to many ECU variations, check with APR about software availability.
2006 - 2008¹ VW Rabbit 2.5L² Fully Loaded ECU 180HP / 201FT-LBS 181HP / 204FT-LBS $599.00  
2006 - 2008¹ VW Rabbit 2.5L² Single Program 180HP / 201FT-LBS 181HP / 204FT-LBS $349.00  
2006 - 2008¹ VW Jetta 2.5L² Fully Loaded ECU 180HP / 201FT-LBS 181HP / 204FT-LBS $599.00  
2006 - 2008¹ VW Jetta 2.5L² Single Program 180HP / 201FT-LBS 181HP / 204FT-LBS $349.00  
2006 - 2008¹ VW Beetle 2.5L² Fully Loaded ECU 180HP / 201FT-LBS 181HP / 204FT-LBS $599.00  
2006 - 2008¹ VW Beetle 2.5L² Single Program 180HP / 201FT-LBS 181HP / 204FT-LBS $349.00  

All of the options below are included with the purchase of a Fully Loaded ECU, however they may be added a la carte when only purchasing a single program.

Program Switching Technology
¹Prices applicable to the North American market only.
²Due to many variations between ECU's some programs/options may unavailable.
For a total of 2 programs (i.e. - Stock and Chipped)² $149¹
For a total of 3 programs² $219¹
For a total of 4 programs² $289¹
Other Available Options
¹Prices applicable to the North American market only.
²Due to many variations between ECU's some programs/options may unavailable.
Security Lockout² $59¹
Fault Code Erase/Throttle Body Alignment (FCE/TBA)² $59¹
Anti-Theft System² $199¹


EMCS is APR's revolutionary patented Enhanced Modular Chipping System. EMCS is an industry leading technology that brings many new features to the automotive enthusiast. This technology was developed exclusively by Audi Performance & Racing, LLC and demonstrates APR's continued commitment to lead the industry with the most technologically advanced products available.

Want chipped mode? Want to be able to switch back to your stock settings? Want a race mode to run 100 octane fuel at the track? How about a valet mode that limits power? EMCS is the lone technology on the market that can give you all of these options. No changing of the chip or ECU is required. These programs are available at the touch of a button.

Other companies have attempted to imitate EMCS with clumsy external switching devices that only replace portions of a "base" calibration. EMCS is still the only Bosch Motronic Engine Management System enhancement that gives the ECU the ability to completely rewrite the entire operating map data when selecting different programming options. This allows for completely new and independent calibrations for each program selected giving you the best, most powerful and complete Stock Modes, 91, 93 and 100 octane Performance Modes and Valet Modes.

APR's EMCS features and program modes are activated via your OEM cruise control buttons for ease of use and stealth. Your cruise control will continue to function as normal, but will give you the ability to scroll through the programs you have purchased with your APR ECU Upgrade. The procedure is simple and involves only two steps.

How EMCS Works

Step 1

Press and hold the "set" button on your cruise control. After approximately five seconds, the "check engine" light on your dash will begin to blink once per second. This will tell you that you are activating program one. This blinking sequence will continue for approximately five seconds.

After this five second interval, the "check engine" light will begin blinking twice per second. This will indicate that you have activated the second program. This process is continued to access any remaining programs you may have purchased. (three blinks = program three, four blinks = program four).

Step 2

Once you have activated the desired program, simply release the "set" button. The "check engine" light will stop flashing. Turn the ignition key off for 10 seconds, turn the key back on, and you will be locked in that program until you change it again.

It's that simple.

Available Features

APR's EMCS is a truly modular system that allows for future enhancements and features to be added as they are developed without the need for additional hardware. EMCS makes the following advanced features possible:

  • Program Switching Enables you to swap between two or more engine programs using the cruise control stalk. All cars have stock and standard chipped program versions available. Valet, race-gas, and other specialty programs are available for most models.
  • Fault Code Erase/Throttle Body Alignment (FCE/TBA) Fault Code Erase allows you to erase and reset engine related trouble codes without having to use a specialty tool. Throttle Body Alignment allows you to manually perform throttle-body adaptation.
  • Security Lockout Prevents unauthorized personnel from accessing EMCS functions. The user may select any 2 to 4 digit security code. The security code is entered using the cruise control buttons.
  • Anti-Theft You can render your car immobile to thieves, even if there is an attempt to start the car with your own key! For more information about Anti-Theft, click here.

Installation Options

APR's ECU Upgrade is able to be installed by APR's professional dealer network or by APR directly. Most late model applications are available to be installed via DirectPort programming without removing your ECU or even opening the hood. DirectPort Programming is not available for all models and in these rare cases EMCS Modules are able to be soldered to the ECU.

DirectPort Programming

DirectPort Programming is another industry first brought to you by APR. DirectPort Programming is also referred to as "flashing" the ECU with the new operating software contained in APR's ECU Upgrade. No more soldering additional hardware to expensive and delicate factory electronics. DirectPort Programming facilitates ease of installation and offers new features to give you even more flexibility with your OEM ECU. DirectPort Programming is only available by bringing your car to an APR dealer or by mailing your ECU to APR directly.

Demonstration Software

All APR ECU Upgrades installed via Directport Programming are eligible for a 6 hour free trial. This means you can experience the performance of the APR ECU Upgrade for your vehicle at no cost to you for 6 hours of driving time!

Security, Warranty and Money Back Guarantee

All APR ECU Upgrades are fully encrypted to prevent theft of our valuable and proprietary coding information by lesser companies and to provide protection to our clients by keeping the upgrade undetectable to a dealership's VAG diagnostic tool.

All APR ECU Upgrades include a limited lifetime warranty against defects in the software and to provide free updates and reflashes as they become available. Installati

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