2.0 WRX and 2.0 STi Standard Wiring Harness


SKU: PR-BTHR002 iWire Services

Available Now!

Safe & Secure

Finally, a pre-fabbed off the shelf harness to run all of the ECU and engine realted components for a 2.0 WRX or 2.0 STi platform. This standardized harness is sleeved and includes a weather proof fusebox and has just about all of the basic needs covered. We've designed this harness for anyone doing a Subaru Race Car, Subaru Powered VW, Porsche, Sandrail, or Kit Car.

The kit uses our DIY harness as the base platform and gets most of the key components to run the engine solved. Run power to the fusebox, connect up the leftover leads for things like the radiators fans and fuel pump, then fire it up! 

This harness has pre-determined lengths so depending on the application it may not be a perfect fit but there will be plenty of slack for most any project. It is up to the customer to connect some of the loose leads including gauge cluster, speed sensor, radiator fans, etc. but comes with instructions and basic tech support from iWire.

Features Included:

Weather proof fusebox that contains all of the key fuses including radiator fan and fuel pumps.

Circuit breaker and battery connect to tie into the alternator circuit.

OBD2 Port and test mode for reading codes and reflashing the ECU with a COBB Accessport (USDM ECUs) or Opensource Software (JDM ECUs).

Plugs for fuel pump controller.

Leads for gauge cluster, coolant temp, oil pressure, speed sensor, radiator fans, fuel pumps, etc.

Compatible Engines:
2002-2005 USDM WRX (EJ205 without AVCS)
2001-2006 JDM WRX (EJ205 with AVCS)
2001-2006 JDM STi (EJ207 with AVCS)

Turn Around Time: 1-2 Weeks

With all new materials, high quality sleeving, and designed with top notch fit and finish in mind, our 2.0 WRX and STi ECU to Engine Wiring Harness is more than just a stock replacement.

More info on these EJ205/7 models - https://www.iwireservices.com/post/subaru-ej205-breakdown

Suggested Uses:
Subaru Race Car
Subaru into Vanagon
Subaru into Bug
Subaru into Porsche
Subaru into Kit Car
Subaru into Dune Buggy



This kit is designed to modify the electrical systems in your vehicle. Working around electricity can be dangerous and even deadly if proper care is not taken. While iWire takes pride in making our products as simple as possible to use, we still recommend that a professional, qualified technician perform the installation. Any modification to a vehicle that exceeds the original manufacturer specifications carries an inherent risk of mechanical failure that could result in damage to life or property. iWire is not responsible or liable for any damages that may occur. THIS PRODUCT IS NON RETURNABLE. By purchasing this product, you agree to these terms of sale.