Part description

This engine harness is designed for Citroën and Peugeot cars and is an important part of the engine wiring. It serves to connect individual electrical elements in the engine compartment and to correctly transmit signals and power between components.

A used original part is a suitable choice for repair when existing wiring is damaged, wires are broken, faulty connectors or when solving repeated electrical problems. Parts of this type are often also searched for by production numbers, so here we also present the related designations for an easier search.

Technical information

• Manufacturer: Stellantis Citroën Peugeot
• Model: Citroën C4, Peugeot 307
• Other numbers: 9684875780, 9663466280, 9663466380, 9684875680, 6564FG, 6569FG

Product codes

Product codes: 9663466280, 6569FG, 9684875780, 9663466380, 9684875680, 6564FG

• Citroën C4
• Peugeot 307

Installation recommendations

Generally/typically for the engine wiring harness, the exact replacement procedure may vary depending on the specific car model, engine design and equipment. Below is a practical general procedure for this type of part.

1) Before assembly

• Check the overall condition of the harness used, especially the integrity of the insulation, connectors, latches and grommets.
• Compare the new and original part by shape, branch length, connector type and product numbers.
• Check the bundle for signs of overheating, chafing, improper repair, or oxidized contacts.
• Disconnect the vehicle battery before starting work.

2) Necessary tools and materials

• Basic set of hand tools
• Plastic pry bar or cover removal tool
• Work lighting
• Cleaning agent for electrical contacts
• Cable tapes or original fasteners if needed for secure wiring
• Protective gloves

3) Step-by-step assembly procedure

1. Disconnect the battery and secure the vehicle against unwanted movement.
2. Access the original harness wiring by removing covers and parts that prevent access.
3. Sequentially mark the individual connectors and wiring branches so that there is no confusion during assembly.
4. Disconnect all connectors of the old harness carefully, without using excessive force to avoid damaging the latches.
5. Release the original harness from all brackets, mounts and guides.
6. Remove the old bundle and compare the used spare part by piece next to it.
7. Place the new bundle in the original wiring route so that there is no tension, kink or contact with a sharp edge anywhere.
8. Connect the individual connectors one by one and always check their correct seating and securing.
9. Fix the harness in all brackets and make sure that the wiring does not move freely.
10. Check that no part of the bundle runs near places at risk of mechanical damage or excessive heat.
11. Reinstall all the removed covers and other parts.
12. Connect the battery and perform a basic function check of the electrical systems related to the engine.
• 4) Post-assembly checks and test drive/function verification
  • Check that the engine compartment is not left with an unconnected connector or an unsecured branch of the wiring.
  • After connecting the battery, verify normal system operation with no dropouts, interruptions, or irregular behavior.
  • After a short test drive, visually check again that the harness has not loosened anywhere and that there is no abrasion.

  5) The most common assembly mistakes + how to avoid them

  • Swapping connectors – mark everything before disassembly and compare the position and shape during assembly.
  • Insufficient harness fixing – always return wiring to original brackets and mounts.
  • Damage to the connector latches – disconnect the connectors carefully and in the correct direction.
  • Assembly without checking the condition of the contacts – before connecting, check the cleanliness and condition of the pins and connectors.

  Reasons why the part is damaged

  • Long-term exposure to heat in the engine compartment
  • Abrasion of cabling against surrounding parts due to poor fixing
  • Isolation damage due to age and vibration
  • Oxidation of contacts and connectors
  • Unprofessional interventions in the electrical installation or additional cable repairs
  • Mechanical damage when disassembling other parts of the engine compartment
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