Subaru OEM Engine Harness (2007 STI) | 24020AD780

Overview

This Genuine Subaru OEM Engine Harness (Part No. 24020AD780) is the factory-original wiring harness designed specifically for the 2007 Subaru Impreza WRX STI. As an authentic OEM component, it delivers a guaranteed exact fit, ensuring every connector, terminal, and routing point matches the factory specifications your STI was built with. Whether you're replacing a damaged harness or performing a complete engine rebuild, choosing the genuine OEM part eliminates the guesswork and compatibility concerns that come with aftermarket alternatives.

Key Features & Benefits

• Genuine Subaru OEM Quality — Manufactured to the exact same standards as the original harness that left the factory, ensuring full electrical compatibility with your EJ257 engine and all associated sensors, solenoids, and control modules.
• Exact Fitment Guaranteed — Engineered specifically for the 2007 Subaru Impreza WRX STI; every connector and routing bracket aligns perfectly with factory mounting points, eliminating modification or adapters.
• Factory-Grade Materials — Constructed with OEM-spec wire gauges, insulation, and connector housings rated for the thermal and vibration demands of a high-performance turbocharged engine bay.
• Plug-and-Play Installation — Designed as a direct replacement that connects to existing factory components without splicing, cutting, or custom wiring work.
• Maintains Vehicle Integrity — Preserves factory ECU communication, sensor accuracy, and emissions system function, protecting your STI's performance and reliability.
• Backed by Subaru — Covered under Subaru's standard OEM parts warranty when installed by an authorized Subaru dealer or qualified technician.

What's Included

• 1x Genuine Subaru OEM Engine Wiring Harness (Part No. 24020AD780)

Specifications

Fitment & Compatibility

This engine harness is a direct OEM replacement for the following vehicle:

Always verify your vehicle's VIN and existing part number before ordering to confirm compatibility. Cross-reference Subaru part number 24020AD780 with your factory parts diagram or dealer to ensure this is the correct harness for your specific build date and configuration.

Installation

This engine harness is designed as a direct plug-and-play OEM replacement. All connectors are factory-matched, requiring no splicing or modification. Due to the complexity of engine harness replacement — involving disconnection of numerous sensors, injectors, ignition components, and ECU connectors — professional installation by a qualified Subaru technician or experienced mechanic is strongly recommended. Improper installation can result in electrical faults, ECU errors, or engine damage.