Description
Roof airbag for Citroën C4 II and DS4. Passenger side – right.
This roof/curtain airbag is a direct-fit safety component designed for Citroën C4 II (B7) and DS4 models. Intended for the passenger side (right), it provides head protection in side impacts and roll-over events as part of the vehicle SRS (Supplemental Restraint System). The unit matches common OEM reference numbers used by Stellantis brands and is suitable for professional workshops and experienced DIY mechanics who carry out interior and SRS repairs.
Technical Information
- Manufacturer: Stellantis (Citroën/Peugeot)
- Model: Citroën C4 II (B7); DS4
- Product Codes: 9687158680, 9801890680
- Other Numbers: 821602, 821602 NFP
Fitment And Compatibility
Designed to fit the roof lining on the passenger side (right) of Citroën C4 II (B7) and DS4. Commonly searched by OEM part numbers 9687158680 and 9801890680. Verify physical match with the vehicle’s mounting points and connector types before installation. This airbag is intended as a replacement for vehicles originally equipped with a roof/curtain passenger airbag on the right side.
Function
The roof/curtain airbag is part of the SRS network and deploys in lateral impacts or roll-over scenarios to protect occupants’ heads and reduce the risk of serious injury. The module contains an inflator and fabric cushion that inflate rapidly when triggered by the vehicle’s crash sensors. Proper electrical connection and secure attachment to the roof structure and headliner are essential for correct operation.
Replacement And Installation
- Disconnect the negative battery terminal and wait at least 10–15 minutes to allow the vehicle’s SRS capacitors to discharge before starting work.
- Remove interior trim and headliner fasteners carefully using proper trim tools to avoid breaking clips or damaging the headliner material.
- Handle the airbag unit with care: keep the inflated side facing away and avoid placing the module face down on hard surfaces.
- Disconnect the electrical connector using the correct release method; do not cut or force connectors.
- Fit the replacement unit by aligning mounting points and securing fasteners to the manufacturer’s recommended torque where available.
- After mechanical installation, use a diagnostic tool to clear any SRS fault codes and confirm the airbag circuit and sensors operate correctly. If the SRS warning lamp remains on, re-check connections and perform a full system diagnosis.
- If You Are Not Fully Confident: Installation Should Be Performed By A Qualified Technician With SRS Experience.
Why This Part Most Commonly Fails
Roof airbags typically require replacement after deployment in a crash. Other common causes of faults include damaged or corroded electrical connectors, moisture ingress during prior repairs, incorrect handling during interior work, or electrical faults in related sensors or wiring. Mechanical damage to the mounting points or improper reinstallation of headliner clips can also lead to malfunction or SRS warnings.
Recommendations For Workshop Use
Always follow the vehicle manufacturer’s safety procedures when working on SRS components. Use insulated tools where appropriate and store removed airbag modules with the trim side up on a stable surface away from heat sources. Perform a full diagnostic scan after fitting to ensure the SRS system is restored to proper operation.
Notes For Buyers
Searchable by OEM numbers 9687158680 and 9801890680; suitable for Citroën C4 II (B7) and DS4 roof/curtain passenger side (right). Ideal for professional mechanics and experienced DIY enthusiasts performing SRS repairs or interior restorations.
