Link ECU WRXLink (V10) WRX107X - Subaru Impreza WRX/STI EJ25 (2.5L) 2004–2007 (GD/GG chassis with electronic throttle)

Subaru Impreza WRX/STI EJ25 (2.5L) 2004–2007 (GD/GG chassis with electronic throttle) 

Easy to install. Affordable. Reliable.
The Link G4X PlugIn ECU transforms your WRX into a precision-tuned performance machine. Enjoy the latest in engine management technology, fitted directly into your OEM enclosure with no loom modifications required.

Choose the Right Model – Pin Check Required!
The fastest and most reliable way to determine which ECU you need is to check pins A1–A3 on the OEM connector:

If pins A1–A3 have wires → You need the WRX104X.
If pins A1–A3 are empty → You need the WRX107X (this listing, 225-4000)
Some late 2006 cars require the WRX107X, so this check is essential.

Vehicle Compatibility

Designed for WRX V10 EJ25 (2.5L) 2004–2007
Manual transmission only
Suits GD/GG chassis with electronic throttle
Not suitable for GR/GH/GE/GV hatchback or 3rd generation WRX
Model breakdown:
WRX104X → Mostly covers 2004–2006 
WRX107X → Covers 2007 and some late 2006"