Description
Socket For The Right Rear Lamp For Citroën C4 3-Door Coupe. The Condition Of The Bulbs Themselves Is Unknown. Includes A Section Of Wiring.
This replacement rear lamp socket is designed for the right-hand tail light on Citroën C4 3-door Coupe models. It is an ideal part for professional workshops and independent mechanics performing lamp repairs or wiring fixes. The socket comes with part of the wiring harness and retains the bulb holders, which makes it a practical solution when the original connector is corroded, melted or the wiring insulation is damaged. Commonly searched by part numbers 9646801677 and 6351T6 — include these codes in your search to find the exact match quickly.
Technical Information
- Manufacturer: Stellantis / Citroën
- Model: Citroën C4 I Coupe (3-Door)
- Product Codes: 9646801677, 6351T6
- Additional Numbers: 6351T6 | 9646801677
How The Part Works And Why It Fails
The lamp socket holds and connects the rear bulbs to the vehicle wiring, ensuring power and a secure mechanical fit. Over time these sockets commonly fail due to corrosion from moisture ingress, heat damage from high-wattage bulbs or poor contacts causing increased resistance and local heating. Mechanical damage, cracked plastic or worn pins in the connector also lead to intermittent or complete loss of lighting function.
Replacement Frequency
There is no fixed service interval for a tail lamp socket. Failure usually occurs gradually and depends on environmental exposure, quality of previous repairs and the bulb type used. In practice, sockets may last many years but should be inspected if you experience flickering lights, intermittent operation or visible corrosion.
Installation Recommendation
Recommended For Experienced Mechanics And Competent DIYers. Typical Replacement Steps:
- Remove Interior Trim In The Boot/Trunk To Access The Tail Lamp Assembly.
- Unscrew And Withdraw The Lamp Cluster From The Body.
- Unplug The Wiring Harness Connector And Remove The Old Socket From The Lamp Housing.
- Fit The New Socket Into The Lamp Housing, Reconnect The Wiring And Secure Any Clips Or Seals.
- Test All Bulb Functions (Stop, Tail, Indicator, Reverse If Applicable) Before Reassembling Trim.
Always Disconnect The Battery If You Will Be Working On Live Circuits Or Cutting/Wiring The Harness To Avoid Short Circuits. Ensure Sealing Surfaces Are Clean And Use Dielectric Grease On Contacts If Needed To Reduce Future Corrosion.
Most Common Cause Of Failure
Corrosion And Heat Damage Are The Primary Causes. Water Entry Through Damaged Seals Or Cracked Lenses Leads To Oxidation Of Pins, While Repeated Thermal Cycling From Bulb Heat Causes Plastic Deformation And Contact Loss.
Part Numbers And Clear Identification Make Ordering Faster — Use 9646801677 Or 6351T6 When Searching. This Socket Is Supplied With A Section Of Wiring To Simplify Replacement And Reconnection.
