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Subaru WRX 2002-2005 MS3Pro PnP Plug and Play
Subaru WRX 2002-2005 MS3Pro PnP Plug and Play
Subaru WRX 2002-2005 MS3Pro PnP Plug and Play
Subaru WRX 2002-2005 MS3Pro PnP Plug and Play
Subaru WRX 2002-2005 MS3Pro PnP Plug and Play
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Subaru WRX 2002-2005 MS3Pro PnP Plug and Play

5 out of 5 based on 1 customer rating
(1 customer review)



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2002, 2003, 2004, 2005 Subaru WRX MS3Pro PnP Plug and Play ECU

This PNP WRX ECU Fits 2002-2005 (USDM Only!) Subaru Impreza WRX with manual transmission (known as the Bugeye WRX)  Does not fit STi models.  

This Plug and Play WRX ECU is incredibly quick and easy to install. Most users average about one hour for the complete installation.  

2002 – 2005 Bugeye WRX MS3Pro PnP ECU Part#SW0205 Features:

  • Fully Plug and Play Installation – No wiring required for basic functionality
    •  Average install time is under 1 hour!
  • Base map is pre-loaded to help your engine start on the first turn of the key
  • Real time tuning and data logging with a laptop connection
  • 8 GB internal data logging with built in SD card
  • Supports most aftermarket wideband sensors

Fully Tunable Engine Control!

  • 16×16 Fuel Tables allow high resolution tuning
  • 16×16 Ignition Tables
  • Multiple Acceleration enrichment strategies
  • Closed Loop Idle Speed Control
  • Air Conditioner Control
  • 4 sequential fuel injector channels with individual trim tables
  • Onboard peak and hold drivers support both high and low impedance injectors – No external ballast resistor is needed!
  • Allows removal of stock mass air flow sensor
  • Closed loop boost control – includes boost by gear or ground speed

Advanced Feature Set (Included!)

  • 12×12 Air Fuel Ratio Target Tables for use with wide band O2 sensor for precise tuning and table trim.
  • AVCS (Variable valve timing) support for engine swaps (uses extra wires on the expansion connector)
  • Multiple traction control strategies
  • Built-in 3-step rev limiter / launch control with flat shift and burnout rev limiter
  • Real time barometric correction
  • Internal 4-bar MAP sensor reads up to 44PSI of boost
  • Overboost protection
  • Rally style anti lag
  • Water injection control – on/off or variable
  • Knock sensor input with adjustable sensitivity, crank angle windowing, and more
  • Table switching input. Change fuel and spark maps on the fly for different fuels, nitrous activation, etc.
    Input for flex fuel sensor – switch between E85 and gasoline on the fly!
  • CANBus connector allows interconnection of other MegaSquirt-compatible devices for additional functions (EGT Input, Additional Sensors…..the possibilities are limitless!

What you get in the box:

  • MS3Pro PnP ECU for the 2002 – 2005 Bugeye Subaru WRX
  • MSPNP 6′ RS232 serial tuning cable (USB adapter sold separately)
  • Tuning Software and Documentation on USB memory stick
  • 6′ Vacuum Hose for MAP Signal and ‘T’ fitting
  • Four Screws for ECU mounting
  • Registered version of TunerStudio and MegaLog viewer included
  • Make sure to use our Custom TunerStudio Dashboard, designed specifically to help make tuning your new build intuitive and easy!

Customer reviews

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1 review for Subaru WRX 2002-2005 MS3Pro PnP Plug and Play

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Where is this product assembled?

  • This product is assembled in Suwanee, Georgia, USA

Is this all that I need to get started tuning my WRX?

  • This is meant to be a complete system, including the cables needed to connect to your laptop. However, there are several other things you may wish to add to use this unit to its full potential.

Does this unit support AVCS motor swaps?

  • Yes. Use Digital Frequency In 3 on the options port for the second cam input. You can use PWM2 and one of the high current outputs for the cam control solenoids. The high current output will need a 1N4001 diode across the solenoid, banded end to the 12 volt supply.

Questions & Answers

    I have a 2002 WRX Impreza from Japan:: engine Engine EJ 205 GDAA Will MS3Pro work on this vehicle.
  1. 3 votes
    Q I have a 2002 WRX Impreza from Japan:: engine Engine EJ 205 GDAA Will MS3Pro work on this vehicle.
    Asked by Gary Albert

    Currently, we have not been able to confirm JDM applications. Can you send us a pinout for your ECU, or if none is available, a picture of the ECU looking into the pins on the factory connector?

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