• Link ECU G4X Subaru Impreza WRX & STI V10 04-06 WRXLink (04) WRX104X PlugIn ECU
  • Link ECU G4X Subaru Impreza WRX & STI V10 04-06 WRXLink (04) WRX104X PlugIn ECU
1 2

Link Engine Management

Link ECU G4X WRX104X – Subaru WRX 2.5 EJ25 2004–2006 Plug-In ECU

Link ECU G4X WRX104X – Subaru WRX 2.5 EJ25 2004–2006 Plug-In ECU

£1,475.00
£1,475.00
Sale Sold out

WRXLink (04) – WRX104X G4X Plug-In ECU for Subaru WRX V10 EJ25. Easy to install, affordable, and reliable. This ECU mounts inside the factory OEM enclosure and plugs into the original wiring loom with no changes required for the supported models. Designed for the 2.5 L EJ25 (V10) covering 2004 to 2006.

Important fitment notes

  • Manual transmission only.
  • Air temp sensor recommended.
  • Most factory features are supported. Check the Features tab for I/O expansion options.
  • Please check your ECU connector matches the header in the product photos before purchasing.

Suitable applications

The WRX104X is designed for Subaru WRX V10 models with EJ25 2.5L turbo, electronic throttle, and manual transmission only.

  • 2004 Subaru WRX (GD/GG chassis, EJ25 turbo, DBW)
  • 2005 Subaru WRX (GD/GG chassis, EJ25 turbo, DBW)
  • 2006 Subaru WRX (GD/GG chassis, EJ25 turbo, DBW — only if pins A1–A3 on factory connector are populated)

The fastest way to confirm: check whether pins A1 to A3 are populated on the factory connector.

  • If A1 to A3 have wires, you need WRX104X.
  • If A1 to A3 have no wires, you need WRX107X.

Chassis: Suits GD or GG with electronic throttle. Not suitable for GR, GH, GE, or GV third generation WRX.

G4X PlugIn key features

  • Up to 6D fuel and ignition mapping
  • Precision closed loop cam control, four cam independent where applicable
  • Sequential fuel delivery
  • Digital triggering, supports 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 and flexible CAN communications
  • QuickTune automated fuel tuning
  • Individual cylinder corrections
  • 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
  • Supports Hall, VR, or optical sync and crank sensors
  • Boost control by gear, speed, or throttle position
  • 512 MB on board data logging
  • Staged injection
  • Knock control with windowing

I/O expansion options

There are two expansion connector layouts depending on ECU year.

2004 to 2006 ECU expansion connector

  • 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 to 2007 ECU expansion connector

The 2006 to 2007 V10 ECU contains an 8 pin expansion connector:

  • Aux 11 — Auxiliary output
  • An Temp 4 — Temperature sensor input
  • Aux 12 — Auxiliary output
  • AN Volt 11 — Analog 0 to 5 V input
  • Aux 13 — Auxiliary output
  • DI 11 — Digital input
  • +5V Out — Low current +5V supply
  • GND — Sensor ground only

Downloads

More ECU resources are added over time. See our main ECU Downloads and Resources page for updates.

View full details