Description
Bulb holder with bulbs for the left outer rear lamp of CITROËN C4 B7 second generation. Supplied with a short section of wiring.
This replacement bulb holder (socket) is designed for the left outer rear lamp of Citroën C4 II (B7) and is ideal for professional workshops and DIY mechanics who need a direct, plug-and-play solution. The unit arrives with bulbs fitted and a short length of wiring to simplify installation and restore reliable electrical contact for brake, tail and indicator functions.
Designed to match the original mounting and electrical connections of the factory unit, this socket helps eliminate common rear-light faults such as flickering, intermittent contact or non-functioning bulbs. Searchable by product code 6350KS, the part is often sought under this reference when sourcing replacements.
Technical Information
- Manufacturer: Stellantis / Citroën
- Model: Citroën C4 II (Second Generation, B7)
- Product Codes: 6350KS
- Other Numbers: N/A
Function And Fitment
The socket holds the rear lamp bulbs and provides the electrical contacts for tail light, stop light and turn signal functions (depending on the lamp configuration). It fits the left outer rear lamp assembly and is supplied with a short wiring pigtail to connect to the vehicle harness.
Installation Recommendation
- Disconnect Negative Battery Terminal Before Work: Prevents short circuits and accidental bulb activation.
- Access Tail Light Assembly: Open the trunk/tailgate and remove the access panel or interior trim to reach the rear lamp fasteners.
- Remove Lamp Cluster: Unscrew or unclip the lamp assembly and carefully pull it out to reach the bulb holder.
- Disconnect Old Socket: Unplug the original connector or cut the cable if necessary and remove the old socket by twisting or unclipping from the lamp housing.
- Install New Socket: Insert the new socket into the lamp housing until it locks, connect the wiring pigtail to the vehicle harness (matching colors/pins), and ensure a secure mechanical and electrical connection.
- Test Before Reassembly: Reconnect the battery temporarily and test all light functions (tail, brake, indicator) before refitting the lamp cluster and trim.
- Secure And Seal: Ensure connectors are tight and use dielectric grease on contacts if desired to improve longevity; reassemble the lamp and interior panels.
Most Common Failure Reasons
- Corrosion And Water Ingress: Moisture entering the lamp housing causes oxidized contacts and poor conductivity.
- Thermal Degradation: Heat from bulbs over time can deform plastic sockets or damage contacts.
- Mechanical Wear And Vibration: Repeated removal, impact or vibration can crack the holder or loosen terminals.
- Wiring Damage: Chafed or pinched wiring near the socket leads to intermittent faults or open circuits.
- Poor Contact Or Dirty Terminals: Accumulated dirt or oxidized terminals results in flicker or loss of function.
Signs that the socket needs replacement include flickering lights, intermittent bulb operation, error warnings (on vehicles with monitoring), or visible corrosion or melted plastic. Replacing the socket promptly restores reliable rear-light operation and improves safety on the road.
