Description
Bulb sockets – rear light – for Citroën Berlingo and Peugeot Partner first generation. No corrosion, not heat-damaged, fully functional, bulb functionality not guaranteed.
High-quality replacement bulb sockets designed for the rear light clusters of first-generation Citroën Berlingo and Peugeot Partner. Ideal for professional garages and DIY enthusiasts who need a reliable, direct-fit part identified frequently by the code 634679. The socket ensures a secure electrical contact between the bulb and vehicle wiring, reducing flicker and intermittent faults when mounted correctly. This part is particularly useful when the original holder shows signs of wear, corrosion or thermal deformation but the light cluster itself is still serviceable.
Technical Information
- Manufacturer: Stellantis (Citroën/Peugeot OEM)
- Model: Citroën Berlingo I (First Generation); Peugeot Partner I (First Generation)
- Product Codes: 634679
- Additional Numbers: Not Available
Function
The bulb socket holds the rear light bulb in place and provides the electrical contacts needed for tail, brake, and indicator lamps (depending on the lamp type). A good socket maintains firm contact under vibration and thermal cycling, preventing intermittent lighting faults and high-resistance heating at the contact points.
Replacement Procedure
- Switch off ignition and all lights. If unsure, remove the ignition key.
- Open the tailgate and access the rear lamp cluster from the luggage compartment. Remove any trim or covers as required.
- Unscrew or unclip the lamp lens and withdraw the bulb holder assembly.
- Disconnect the electrical connector and twist/remove the old socket from the lamp holder.
- Install the new socket, ensure it locks into place, reconnect the electrical connector and fit the bulb.
- Test all light functions (tail, brake, indicator, reverse if applicable) before refitting the lens and trim.
Recommended Installation
- Apply a small amount of dielectric grease to the socket contacts to prevent future corrosion and improve conductivity.
- Inspect the lamp housing seal and wiring grommets for water ingress—repair any damaged seals to prevent repeat failure.
- Use the correct bulb type and rating specified for the vehicle to avoid overheating the socket.
- Test lighting functions before final reassembly to avoid multiple removals.
Most Common Cause Of Failure
Socket failures are usually caused by moisture ingress and corrosion of the contacts, thermal degradation from overheated bulbs, mechanical wear or deformation from repeated bulb changes, and vibration-induced loosening. Poor sealing of the lamp unit or cracked lenses accelerates deterioration.
Search Tip: Technicians and DIYers commonly look up this part by the code 634679—include this number in searches to find matching replacements quickly.
