Introduction

Welcome to AutoMan Spare Parts – the leading supplier of OEM Engine Control Units (ECUs) in Australia and one of the most trusted automotive spare parts stores worldwide. Our platform, www.automanspareparts.com, offers a huge range of genuine, pre-tested, plug-and-play ECUs at the cheapest market prices with fast global shipping.

In this guide, we cover everything related to the Subaru Impreza 2002–2005 Security Set ECU Kit (2.0 EJ20), including OEM compatibility, part numbers, symptoms, replacement instructions, programming requirements, and expert tips.

Complete Guide Subaru Impreza 2002–2005 Security Set ECU Kit | 2.0 EJ20 Petrol

OEM Part Numbers Covered

This ECU Kit includes:

• Engine Control Unit (ECU) OEM: 22611AF671

• ECU Hardware Code: A18-000D7G

• Immobilizer Unit

• Ignition Barrel + Matching Keys

• Body Control Module (if applicable)

This is a full security set, meaning all components are paired to each other.

Why the Subaru Impreza EJ20 Requires a Security Set

Subaru vehicles from 2002–2005 use an immobilizer-linked ECU system. If components do not match, the engine will crank but not start. A full matching security kit ensures:

• Correct immobilizer handshake

• Fast installation

• No need for dealer-level reprogramming

• Guaranteed start

AutoMan Spare Parts supplies pre-matched security kits ready to install.

Does It Need Programming?

No programming is required when installing a complete security ECU kit (ECU + Key + Immobilizer + Barrel).
It becomes plug-and-play.

If replacing only the ECU, then programming or immobilizer pairing is required.

Key Features of OEM ECU Kit 22611AF671 / A18-000D7G

• Fits Subaru Impreza 2002–2005 EJ20 petrol

• Genuine OEM unit

• Pre-programmed matching security set

• Direct plug-and-play

• Restores performance, fuel efficiency, and throttle response

• Fixes ECU and immobilizer-related no-start issues

Common Symptoms of a Faulty Subaru Impreza EJ20 ECU

• Engine cranks but does not start

• Immobilizer light flashing

• Random stalling

• Misfire or poor acceleration

• No communication with diagnostic tools

• P0600 / P0605 / P0638 ECU faults

• Key not recognized

If these symptoms appear, replacing the complete ECU Security Set often solves the issue instantly.

Compatibility Table – Subaru Impreza EJ20 ECU Kit

Vehicle Compatibility

ECU Hardware Compatibility

Why Buy from AutoMan Spare Parts

AutoMan Spare Parts is proud to be:

• The No.1 ECU supplier in Australia

• A store with the largest OEM ECU inventory online

• Offering the cheapest OEM ECU prices

• Providing fast worldwide shipping

• Supplying pre-tested and guaranteed original parts

Visit: www.automanspareparts.com

Installation Tips

• Disconnect battery before installing

• Replace entire matched security set

• Ensure all connectors are clean

• Install barrel and immobilizer ring properly

• Reconnect battery and start engine

• No programming required

TLDR

• The Subaru Impreza 2002–2005 (2.0 EJ20) uses ECU OEM 22611AF671 / A18-000D7G

• A full security set includes ECU, keys, immobilizer, and barrel

• No programming needed when full kit is installed

• Plug-and-play replacement

• AutoMan Spare Parts provides original OEM kits, best prices, and global shipping

FAQ

1. Does this Subaru Impreza ECU need programming?

Not if you install the complete security kit. It is plug-and-play.

2. Can I install only the ECU?

Yes, but it will require immobilizer programming by a specialist.

3. Is OEM 22611AF671 compatible with all EJ20 engines?

It fits the 2.0 EJ20 petrol models from 2002–2005.

4. Will a used ECU work?

Only if the entire security set is installed or if it is reprogrammed.

5. Do you ship internationally?

Yes. AutoMan Spare Parts ships globally with fast and reliable delivery.

6. Are these ECUs tested?

All ECUs at AutoMan Spare Parts are fully tested before dispatch.