Description
Roof Airbag For Citroën C4 II And DS4 Vehicles — Passenger Side – Right
High-quality roof (curtain) airbag intended for Citroën C4 II (B7) and DS4 models, designed for the passenger-side (right) position. This unit is an OE-referenced replacement often searched by part numbers and is suitable for professional workshops and experienced DIY mechanics restoring occupant protection after deployment or damage.
Function: The roof (curtain) airbag inflates in the event of a side impact or rollover to protect occupants’ heads and reduce the risk of serious injury. The module is mounted along the headliner and is activated by the airbag control unit to create a protective cushion between the occupant and the vehicle interior.
Typical Service Life And Common Faults: Airbags are single-use safety components—after deployment they must be replaced. Outside of deployment, faults most often arise from water ingress and subsequent corrosion of connectors or wiring, physical damage to the headliner area, or improper previous repairs. Damaged connectors, frayed wiring or clips, and impact-related structural damage may trigger airbag fault codes and disable the system.
How To Replace: Replacement should be carried out by a trained technician or a competent DIYer who follows safety procedures. Basic replacement steps: disconnect the negative battery terminal and wait at least 10 minutes to allow residual charge to dissipate; remove trim and headliner fasteners as required to access the module; carefully disengage the airbag connector using the locking tab and avoid pulling on wires; unbolt or unclip the module and remove it; fit the new airbag and secure all fasteners to the manufacturer’s specifications; reconnect the connector ensuring locking tabs engage; refit trim and reconnect the battery. After installation, clear fault codes with an appropriate diagnostic tool and verify system readiness. Always follow the vehicle manufacturer’s repair manual and torque settings.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Citroën C4 II (B7), DS4
- Product Codes: 9687158680, 9801890680
- Additional Numbers: 821602 NFP
Installation Recommendation
Always disconnect the negative battery terminal and wait a minimum of 10 minutes before working on any airbag components. Use appropriate hand tools and follow the vehicle manufacturer’s trim removal and fastening procedures. Handle the airbag module with care—keep the inflator pointed away from yourself and others, avoid exposure to heat or sparks, and do not modify the module or its connectors. Reinstall fasteners to the manufacturer’s torque values and verify electrical connections are clean and corrosion-free before reconnecting the battery.
Why This Part Fails Most Often
The most frequent causes of failure are prior deployment (airbags are single-use), water intrusion leading to connector or wiring corrosion, impact damage to the headliner or mounting points, and incorrect handling during previous repairs. Loose or damaged connector pins and broken retention clips can also cause airbag system faults that disable deployment.
Notes For Buyers
This part is commonly referenced by OE numbers 9687158680 and 9801890680—searching by these codes can help locate compatible units. Intended audience: professional mechanics and experienced DIYers repairing interior safety systems on Citroën C4 II (B7) and DS4 models.
