Description
Injector wiring harness for Citroën and Peugeot vehicles 1.4 HDi 66 kW (Engine Code 8HY) Delphi injection system. Fully functional, tested.
This injector wiring harness is designed for 1.4 HDi engines using the Delphi fuel injection system and is suitable for a range of Citroën and Peugeot models that use the 8HY 66 kW variant. It provides the electrical connection between the engine control unit and the fuel injectors, ensuring reliable signal and power delivery for precise fuel metering. Frequently searched under part numbers 9645343880 and 6558V1, this loom is a direct-fit solution for mechanics and experienced DIYers looking to replace a damaged or intermittent injector harness.
Key Benefits
- Direct OEM-compatible fitment for affected 1.4 HDi engines—fast, reliable replacement.
- Restores proper injector communication and power, eliminating misfires, rough idle, and drivability issues caused by wiring faults.
- Pre-wired for Delphi injectors and routed to match factory clips and mounting points for straightforward installation.
- Commonly searched by product codes 9645343880 and 6558V1, improving findability when ordering parts.
Typical Applications
Fits vehicles equipped with the 1.4 HDi 66 kW engine (Engine Code 8HY). Common models include Citroën C3 and Peugeot 1007, among other small Stellantis cars that share the Delphi injection architecture.
Installation Recommendations
- Disconnect The Negative Battery Terminal Before Starting To Avoid Short Circuits.
- Remove Any Engine Covers Or Intake Ducting That Obstruct Access To The Injector Rail.
- Label And Photograph Connector Positions Before Unplugging To Ensure Correct Reassembly.
- Carefully Unplug Injector Connectors And Any Associated Sensor Plugs; Release Retaining Clips And Fasteners Securing The Loom.
- Route The New Harness Following Factory Clips And Brackets. Keep Wiring Away From High-Heat Areas (Exhaust Manifold) And Moving Components.
- Secure With OEM-Style Clips Or Quality Cable Ties; Reconnect Battery And Clear Any Stored Engine Fault Codes After Reassembly.
- After Installation, Perform A Functional Check: Start Engine, Listen For Misfires, And Scan For Injector-Related Fault Codes.
Reason For Common Failures
Injector harnesses typically fail due to thermal degradation, oil contamination, vibration-induced connector fatigue, or corrosion at connector pins. Rodent damage and physical abrasion where the loom rubs against brackets or sharp edges are also frequent causes. Symptoms include intermittent misfires, rough idle, poor acceleration, or specific injector circuit fault codes in the ECU.
Technical Information
- Manufacturer: Stellantis (Citroën/Peugeot) / Delphi
- Model: Citroën C3; Peugeot 1007 (1.4 HDi 66 kW, Engine Code 8HY)
- Product Codes: 9645343880, 6558V1, NFP
- Other Numbers: 6558V1 | 9645343880
Notes For Mechanics And DIYers
When replacing the wiring harness, verify connector integrity at the injector and ECU sides. Use dielectric grease on connectors if corrosion risk is present and replace any damaged retainers to prevent future chafing. This part is ideal for professional garages and competent home mechanics familiar with fuel system electrics and ECU fault clearing procedures.
