This rear right tail lamp (tailgate mount) is a direct-fit replacement for Citroën C4 Picasso models and Grand C4 Picasso variants where the part number 9673164980 / 6351CC is referenced. Designed to restore the tailgate lighting assembly’s appearance and functionality, the unit ensures correct brake, tail, and indicator light signals and fits the passenger-side (right) position on the liftgate. Ideal for professional workshops and DIY mechanics searching by part number, this listing helps you quickly find the exact lamp you need for a reliable repair.

Technical Information

• Manufacturer: Stellantis (Citroën/Peugeot)
• Model: Citroën C4 Picasso / Grand C4 Picasso (Tailgate, Right / Passenger Side)
• Product Codes: 9673164980, 6351CC
• Other Numbers: NFP

Function

The tailgate tail lamp houses multiple circuits: rear position (tail) light, brake light, rear indicator, and often the rear fog light or reversing lamp depending on the vehicle wiring. It provides visibility to following traffic and communicates braking and turning intent; correct fitment and sealing are essential for safety and legal compliance.

Replacement Guide

Typical replacement steps for the tailgate lamp (general procedure):

1. Open the tailgate and support it securely.
2. Remove interior tailgate trim or access panel to reach the lamp mounting screws and electrical connector.
3. Disconnect the lamp electrical connector (press release tab) and remove mounting screws or clips.
4. Carefully extract the old lamp from the tailgate, taking care not to damage the wiring or paint.
5. Clean the mounting area and check the rubber gasket/seal; replace seal if deteriorated.
6. Install the new lamp, secure mounting fasteners, reconnect the electrical connector, and test all light functions before reassembling trim.

Installation Recommendations

• Work On A Cool, Dry Day: Moisture can hide corrosion and complicate sealing.
• Check And Replace Gaskets: Ensure the tailgate lamp housing seal is intact to prevent water ingress.
• Use Correct Tools: Trim removal tools, Torx/Screwdrivers and a multimeter or test lamp for function checks.
• Test Before Reassembly: Verify Tail, Brake, Indicator, And Fog/Reversing Lamps Work Correctly.
• Electrical Safety: Switch Off Vehicle Electrical Systems When Disconnecting Plugs; If In Doubt, Disconnect The Battery To Avoid Short Circuits.

Most Common Failure Causes

Tailgate lamps rarely have a fixed service interval; failures are normally caused by external damage or environmental factors. Typical reasons for failure include:

• Impact Or Body Damage From Minor Collisions Or Loading Incidents.
• Water Ingress Due To Deteriorated Seals Or Cracked Lens Causing Corrosion Or Electrical Faults.
• Corroded Electrical Connectors Resulting In Intermittent Or No Function.
• Bulb Or LED Module Failure (If Applicable) Over Time — LEDs Usually Last Longer But Entire Unit May Need Replacement If Encapsulated).

Why Choose This Part

Searching by part number (9673164980 / 6351CC) is the fastest way to ensure compatibility. This lamp restores correct signaling and appearance on the tailgate of Citroën C4 Picasso models, helping you complete accident repairs, replace damaged lenses, or resolve moisture-related faults quickly and professionally.

Reliable replacement bulb socket designed for the tailgate lamps of Citroën C4 Picasso and compatible Grand Picasso models. This socket secures the rear lamp bulbs, provides the electrical contact surface and includes a short length of wiring to simplify installation. Ideal for workshop technicians and DIY enthusiasts searching by part number (e.g. 9653547480, 6351CC, 9653547777, 6350CC), this unit restores stable lighting operation when the original socket shows signs of wear or electrical failure.

Technical Information

• Manufacturer: Stellantis / Citroën
• Model(s): Citroën C4 Picasso, Citroën C4 Grand Picasso
• Product Codes: 9653547480, 6351CC, 9653547777, 6350CC
• Other Numbers: 6351CA, 6351cc, 6350cc

Product Function And Benefits

The bulb holder (socket) provides mechanical support and the electrical contacts for rear tailgate bulbs (brake, indicator, tail lamp). A secure socket ensures consistent contact pressure and correct grounding to avoid flicker or intermittent failure. Supplied with a piece of wiring, this part helps when the original connector or short section of harness is damaged or brittle.

Common Failure Modes

• Corrosion of contact pins due to moisture ingress causing poor electrical connection and intermittent lighting.
• Heat-related deformation or melting from high-wattage bulbs or repeated thermal cycling leading to cracked plastic or loose contacts.
• Broken or frayed wires at the connector caused by repeated opening/closing of the tailgate and vibration.
• Burnt contacts from arcing when contact resistance increases.

Installation Recommendations

• Disconnect the battery before starting work to avoid short circuits and ensure safety.
• Remove the tailgate inner trim to access the lamp assembly. Keep fasteners and clips organised for reassembly.
• Unplug the lamp harness and remove the lamp cluster if required to reach the bulb holder. Note the orientation of the socket before removal (twist-lock or clip style).
• Carefully release the old socket (twist or unclip) and replace with the new unit. Ensure wiring is routed without pinching and that any seals are seated to prevent water ingress.
• Use dielectric grease on contact pins to reduce future corrosion and improve electrical reliability.
• After installation, reconnect the battery and test all rear lamp functions (tail, brake, indicator, reverse if applicable) before reassembling the trim.
• If the harness shows additional damage, repair or replace affected sections and ensure proper grounding.

Why Replace

Symptoms that indicate a failing bulb holder include flickering lamps, lamps that work intermittently, visible corrosion or melted plastic around the socket, or lights that fail only when the tailgate is moved. Replacing the socket and the short wiring piece is a cost-effective repair that restores safe, legal rear lighting and prevents further electrical damage.