Description
Bulb holder for left rear light for Citroën C4 Coupe vehicles. Condition of the bulbs themselves is unknown. Supplied with a piece of wiring.
Description
Direct-fit bulb holder designed for the left rear lamp of Citroën C4 Coupe (3-door). This practical replacement part restores secure electrical contact and mechanical retention for brake, tail or indicator bulbs. Ideal for professional workshops and DIY enthusiasts who frequently search by part number (9646801777, 6350T6) to find the correct item quickly.
Technical Information
- Manufacturer: Stellantis / Citroën
- Model: Citroën C4 Coupe (3-door), C4 I (first generation), approx. 2004–2010
- Product Codes: 9646801777, 6350T6
- Other Numbers: 6350T6
Function
The bulb holder secures the bulb in the rear lamp assembly and provides the electrical connection between the vehicle wiring harness and the bulb contact points. A reliable holder ensures consistent lighting performance and prevents intermittent faults caused by poor contact, vibration or corrosion.
Installation
Typical replacement steps (may vary slightly by body trim and year):
- Open the boot and remove inner trim or access panel to reach the lamp cluster.
- Unscrew or unclip the lamp assembly retaining fasteners and carefully pull the cluster outward.
- Rotate the bulb holder anticlockwise (or release retaining clip) and disconnect the wiring connector.
- Replace the old holder with the supplied unit (including the short section of wiring), reconnect the connector and secure the holder in the lamp cluster.
- Refit the lamp assembly and interior trim, then test all light functions (tail, brake, indicator) before finishing.
Recommended Installation
Disconnect the negative battery terminal before working on the electrical system to avoid short circuits. Check bulb types and condition before fitting the new holder. Use dielectric grease on contacts to reduce the risk of corrosion. Tighten all fasteners to original fitment and verify lamp alignment and sealing to prevent water ingress.
Why This Part Commonly Fails
Failure is usually caused by moisture penetration, corrosion of contacts, heat-related deformation from high-wattage bulbs, or mechanical damage from vibration and repeated bulb changes. Wiring abrasion or broken connector tabs also leads to intermittent or permanent loss of contact.
Compatibility And Practical Tips
Search by OE numbers 9646801777 or 6350T6 to find matching listings quickly. This holder is typically used on left rear lamps of Citroën C4 Coupe (3-door) first generation models. When replacing, verify bulb type and lamp function; replace damaged seals to reduce the chance of repeat failure. For workshops, stocking common lamp sockets by part number speeds repairs and reduces vehicle downtime.
