Description
Left rear lamp for Citroën C4 3-door Coupe. With bulb sockets and bulbs.
Product Overview
This left rear lamp is a direct-style replacement for the Citroën C4 Coupe (3-door). It includes the bulb sockets and the bulbs fitted in the socket assembly, offering a straightforward swap-in solution for damaged or non-functioning tail light units. Commonly searched by part numbers 9646801777 and 6350T6.
Technical Information
- Manufacturer: Stellantis (Citroën)
- Model: Citroën C4 (Coupe, 3-Door, First Generation)
- Product Codes: 9646801777
- Other Numbers: 6350T6
Compatibility
Designed for Citroën C4 Coupe 3-door models. Verify fitment by matching the part numbers listed above to the original unit on the vehicle. This unit follows original mounting points and electrical connector layout for direct replacement in compatible models.
Installation
Typical replacement steps for a left rear lamp:
- Open the rear hatch or trunk and remove the inner trim panel to access the tail lamp mounting area.
- Remove the mounting screws/bolts securing the lamp (usually 2–3 fasteners) and gently pull the lamp outwards.
- Disconnect the electrical connector by pressing the release tab and pulling straight out.
- Remove the lamp assembly from the vehicle, fit the new lamp with bulb sockets installed or transfer bulbs if necessary.
- Reconnect the electrical connector, position the lamp into the body aperture and secure the mounting screws/bolts.
- Check all lighting functions (tail, brake, turn signal, reverse if applicable) before reassembling the interior trim.
Estimated time: Around 20–45 minutes depending on access and experience. Recommended tools: Phillips and Torx screwdrivers, trim removal tool, and basic socket set.
Mounting Recommendations
- Disconnecting the battery is recommended to avoid short circuits when working on electrical components.
- Inspect and, if necessary, replace the rubber gasket or sealing surface to prevent water ingress.
- Apply a small amount of dielectric grease to the connector pins to reduce corrosion and improve contact over time.
- Ensure correct alignment of the lamp before fully tightening fasteners to prevent body panel gaps and ensure a watertight fit.
- Use OEM-style bulbs with the correct spec for brightness and heat characteristics; incorrect bulbs can shorten lamp life or damage the socket.
Most Common Failure Causes
- Water Ingress: Damaged seals or cracks allow moisture in, causing corrosion of sockets and connectors or short circuits.
- Impact Damage: Rear collisions or knocks commonly crack the lens or deform the housing.
- Socket Corrosion: Over time, corrosion at the bulb socket or connector leads to intermittent contact or failure.
- Bulb Failure: Filament bulbs wear out with use; vibration and age accelerate failure.
- Electrical Issues: Wiring damage or poor connector contact can prevent proper lamp function even if the unit itself is intact.
This lamp is frequently searched by its part numbers (9646801777, 6350T6). If the original unit shows signs of water damage, cracked lens, or burnt sockets, replacing the complete lamp assembly is often the most reliable repair to restore full rear lighting function.
