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 WRXLink (04) - WRX104X

WRXLink (04) - WRX104X

Easy to install. Affordable. Reliable.

G4X PlugIn ECUs offer the latest in engine management technology, designed to easily maximize the potential from your car.

This ECU fits inside the factory OEM enclosure. Installation is a breeze, with no alteration of the factory wiring loom required for the models listed below.

Designed for the WRX V10 EJ25. These ECUs cover 2.5L from 2004 to 2007.


Please check your connector matches the header in the listed photo and check the notes in italic below before purchasing.

This ECU works for manual transmissions only.

Air temp sensor highly recommended.

Most factory features are supported.

Check the features tab for I/O expansion options

Suitable Applications:

The WRX104X mostly covered the 2004-2006 range.

The WRX107X (listed separately) mostly covers the 2007 model.


However, some 2006 models require the WRX107X.


*The fastest and most reliable way to tell, is to check whether pins A1-3 are populated.

*If the pins have wires, you need the WRX104X, if there are no wires, you need the WRX107X

*Suits GD or GG chassis with electronic throttle. Not suitable for the GR/GH/GE/GV hatchback or 3rd generation WRX’s

G4X PlugIn Key Features (where applicable):

Up to 6D fuel and ignition mapping

Precision closed loop cam control (four cam, independent control)

Sequential fuel delivery

Digital triggering, all OEM patterns

OEM idle hardware supported

5D boost control with three switchable tables

Motorsport features - antilag, launch, flat shift

Continuous barometric correction (on board)

CAN port

QuickTune - automated fuel tuning

Individual cylinder correction

USB tuning cable included

Stats recording into on-board memory

Gear compensations for spark, boost and fuel

Real time selectable dual fuel, ignition and boost maps

Sync and crank sensors can be a combination of Hall effect, variable reluctance or optical

Boost control referenced to gear, speed or throttle position

512 mega bytes data logging memory

Staged injection

Knock with "windowing"

There are two different options for the expansion connectors, depending on whether your ECU is the 2004-2006 ECU or the 2006-2007 ECU.

2004-2006 ECU

The following expansion connector inputs/outputs are provided:

Blank AN Volt 11

An Temp 4 Temperature sensor input

Blank No function

Blank AN Volt 12

Blank No function

Blank No function

+5V Out Low Current +5V Supply

Gnd Sensor Ground Only

2006-2007 ECU

The 2006-2007 V10 ECU contains an 8 pin expansion connector.

The following expansion connector inputs/outputs are provided:

Aux 11 Auxiliary Output

An Temp 4 Temperature sensor input

Aux 12 Auxiliary Output

Volt 11 Analog 0-5V input

Aux 13 Auxiliary Output

DI 11 Digital Input

+5V Out Low Current +5V Supply

Gnd Sensor Ground Only

    Excluding GST/HST
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