Description
Injector harness for Citroën and Peugeot 1.4 HDi 66 kW 8HY Delphi injection system. Fully functional, tested.
This injector wiring harness is designed for the 1.4 HDi 66 kW engines with the Delphi fuel injection system and restores reliable electrical connection to the fuel injectors. Frequently searched under OE codes 9645343880 and 6558V1, it is a common replacement part for Citroën C3 and Peugeot 1007 owners and workshops. The harness ensures stable signal and power delivery to each injector, helping to eliminate intermittent misfires, rough idle and engine management fault codes caused by wiring faults.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: 1.4 HDi (8HY), 66 kW — Fits Citroën C3, Peugeot 1007
- Product Codes: 9645343880, 6558V1
- Other Numbers: NFP
Installation Recommendations
Recommended for professional mechanics and experienced DIYers. Follow these steps to replace the harness safely and reliably:
- Disconnect the Negative Battery Terminal To Prevent Short Circuits.
- Remove Engine Cover Or Intake Components As Needed For Access.
- Label Injector Connectors Before Disconnecting To Ensure Correct Reassembly.
- Carefully Release Retaining Clips And Unplug Electrical Connectors—Do Not Pull On Wires.
- Inspect Connector Pins And O-Rings; Clean Or Replace If Corroded Or Damaged.
- Route The New Harness Following Original Fastening Points And Secure With Clips To Prevent Chafing.
- Reconnect Battery, Clear Fault Codes With A Scanner, Start Engine And Verify Injector Operation; Check For Misfires And Stored Diagnostic Trouble Codes.
Applying a light film of dielectric grease on connector terminals can help prevent future corrosion. Replace any damaged retaining clips or grommets to maintain correct harness routing and protect against vibration.
Most Common Cause Of Failure
Injector harnesses typically fail due to heat and mechanical wear in the engine bay: insulation cracking from thermal cycling, oil or fuel contamination, chafing against sharp edges or moving components, connector corrosion from moisture, or physical damage caused by rodents. Symptoms include engine Misfires, Rough Idle, Increased Fuel Consumption and Engine Management Warning Light indicating injector circuit faults. Regular visual inspection during service intervals can catch early damage and prevent secondary problems to injectors or ECU inputs.
Suitable For Both Workshop Repairs And DIY Maintenance — use OE numbers 9645343880 and 6558V1 when searching or ordering to ensure correct fitment.
