This used roof airbag is designed for Citroën C4 II (B7) and DS4 models and fits the left-hand driver side position. Ideal for professional workshops and experienced DIY mechanics who require an OEM-fit safety component, this part restores side-impact and rollover protection in the vehicle’s passenger compartment. Supplied with original manufacturer part numbers for quick lookup, it is a direct replacement for damaged or deployed roof (curtain) airbags.

Key Features And Benefits

– OEM compatibility with Citroën C4 II (B7) and DS4 models, ensuring correct fit and deployment geometry.
– Restores side-impact and rollover protection to meet original safety design.
– Supplied with original part numbers to simplify searching and ordering.
– Suitable For Professional Fitment And Experienced DIY Technicians.

Function And Application

The roof (curtain) airbag deploys along the vehicle’s A- and B-pillar / roof rail area to protect the head and upper torso of occupants during side impacts and rollovers. This left-hand driver-side unit is positioned in the headliner/roof rail and connects to the vehicle’s Supplemental Restraint System (SRS). It is intended as a replacement for an airbag that has been deployed, damaged, or become electrically unreliable.

How Replacement Is Performed

General replacement steps (for qualified technicians or experienced DIYers):

• Disconnect The Battery And Wait At Least 10 Minutes (Or Follow Manufacturer Specified Time) To Allow SRS Capacitors To Discharge.
• Remove Interior Trim And Headliner Sections Necessary To Access The Airbag Module And Fasteners.
• Carefully Disconnect The Airbag Electrical Connector(s) And Any Retention Clips.
• Unbolt The Old Airbag Module And Remove It From The Roof Rail.
• Install The Replacement Airbag In Reverse Order, Ensuring Correct Routing And Secure Fastening Of All Fixings.
• Reconnect The Battery, Perform An SRS System Check/Clear Faults With A Diagnostic Tool, And Confirm That The SRS Warning Lamp Operates Normally.

Always Follow Manufacturer Procedures And Torque Values. If Uncertain, Have The Replacement Performed By A Qualified Workshop.

Technical Information

• Manufacturer: Stellantis / Citroën (OEM Fitment)
• Model: Citroën C4 II (B7), DS4
• Product Codes: 9687158780, 9801890780
• Additional Numbers: 821601

Installation Recommendations

Disconnect The Battery Before Any Work On The SRS System And Observe All Safety Precautions. Use Proper Trim Removal Tools To Avoid Damaging The Headliner. After Installation, Use A Diagnostic Scanner Capable Of SRS Functions To Clear Any Stored Fault Codes And Confirm System Readiness. If You Are Not Equipped With SRS Diagnostic Tools, Have A Qualified Technician Complete The Final Verification.

Why This Part Typically Fails

Roof Airbags Are Usually Replaced Because They Were Deployed In A Collision. Other Common Causes For Replacement Include Water Ingress Or Corrosion From Prior Interior Damage, Physical Damage To The Module Or Housing, And Electrical Faults Or Connector Damage Caused By Previous Repairs Or Accidents. Airbags Do Not Have A Defined Service Life Under Normal Conditions, But Any Deployment, Visible Damage, Or SRS Fault Code Warrants Immediate Replacement.

Compatibility And Notes

Designed For Citroën C4 II (B7) And DS4 Applications In The Left-Hand Driver-Side Roof Position. Refer To The Listed Product Codes When Searching For Exact Fits. This Is A Used Part Intended For Replacement Of Deployed Or Damaged Airbag Modules.

High-quality passenger seat airbag designed for Citroën C4 II (B7) and DS4 models. This seat airbag module (OE references 9687158280 / 8217F8) restores occupant protection after a deployment or when the original module develops a fault. Built to meet the strict safety requirements of Stellantis vehicles, the unit is suitable for professional workshops and experienced DIY mechanics who follow proper safety procedures. Keywords: Citroën C4 II passenger seat airbag, DS4 seat airbag, 9687158280, 8217F8, seat airbag module.

Technical Information

• Manufacturer: Citroën (Stellantis)
• Model: Citroën C4 II (B7), DS4
• Product Codes: 9687158280, 8217F8
• Other Numbers: 8217F8, 9687158280

Function

The passenger seat airbag is a pyrotechnic restraint component mounted inside the front passenger seat. In the event of a qualifying frontal or offset impact, the inflator rapidly deploys the airbag cushion to reduce the risk of injury to the occupant by absorbing energy and limiting forward movement. The module works together with seatbelt pretensioners and the vehicle’s SRS control logic to provide coordinated occupant protection.

Replacement Procedure

Replacing a seat airbag requires care and adherence to safety rules. Typical replacement steps used by professionals:

• Park the vehicle on a level surface, engage the parking brake and remove the ignition key.
• Disconnect the negative battery terminal and wait at least 10 minutes to allow residual charge to dissipate.
• Move the seat to access mounting points; remove seat trim panels and upholstery as needed to expose the airbag module.
• Unplug the airbag electrical connector(s) and any seat harnesses, taking care not to damage locking tabs or wiring.
• Remove the retaining bolts securing the airbag module to the seat structure and fit the replacement unit.
• Refit connectors and trims, torque fasteners to manufacturer specifications and ensure all clips are seated correctly.
• Reconnect the battery and use an appropriate diagnostic tool to perform an SRS system check and clear any fault codes. Verify that the airbag warning lamp on the dash extinguishes after the check.

Installation Recommendations

• Always disconnect the battery before starting work and follow the vehicle manufacturer’s service procedures to avoid accidental deployment or damage.
• Handle the airbag module by its housing; do not apply pressure to the cushion or inflator element and keep the trim away from the deployment face.
• Do Not Use Power To Probe Airbag Connectors; use correct connectors and avoid short circuits.
• Ensure electrical connectors are clean and fully engaged; contaminated or loose connections can trigger SRS faults.
• Tighten mounting fasteners to the torque values specified by the manufacturer. If torque values are unknown, consult a workshop manual or service data resource.
• After fitment, perform a full SRS diagnostic cycle with a compatible tool to confirm system integrity and clear error codes.
• If you are not experienced with SRS components, have the replacement carried out or verified by a qualified technician to ensure occupant safety.

Most Common Failure Causes

• Previous Deployment: Airbag modules are single-use after activation and must be replaced following a crash.
• Connector Corrosion Or Damage: Moisture, spills, or physical damage to seat connectors can cause loss of communication and trigger SRS faults.
• Wiring Wear: Repeated seat movement, aftermarket seat heaters or modifications can chafe wires leading to intermittent faults or open circuits.
• Incorrect Repairs Or Improper Handling: Mishandling during repairs or using incompatible connectors can damage the inflator or trigger error codes.
• Electrical Faults In SRS System: Faults elsewhere in the restraint system (sensors, clock spring, control unit) may present as a seat airbag issue; proper diagnostics are required to identify the root cause.

Service Life And Notes

Seat airbag modules do not have a routine replacement interval; they must be replaced if deployed or when diagnostics indicate a fault. Always use parts that match the original OE numbers (9687158280 / 8217F8) for correct fit and function. Do not attempt to repair a deployed or damaged airbag module — replacement is the safe and approved course of action.

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.

This driver seat airbag is a direct-fit safety component for Citroën C4 II (B7) and DS4 models, referenced under the part numbers 9687158380 and 8217F7. Designed for service garages and experienced DIY mechanics, the module restores occupant protection in side-impact scenarios and resolves SRS fault codes related to a faulty seat airbag.

Function And Application

The Seat-Mounted Driver Airbag (side airbag) is installed in the outer side of the driver’s seatback and is designed to deploy in moderate to severe side impacts. Its primary purpose is to protect the chest, abdomen and pelvis of the driver and to reduce the risk of serious injury during a lateral collision. The module contains the inflator and the airbag cushion integrated into a single assembly.

Technical Information

• Manufacturer: Stellantis (Citroën/Peugeot)
• Model: Citroën C4 II (B7), DS4
• Product Codes: 9687158380
• Additional Numbers: 8217F7

How The Part Is Typically Replaced

Replacement of a seat airbag should be performed by a trained technician or a competent DIYer familiar with SRS systems. General replacement steps:

• Disconnect the negative battery terminal and wait at least 10 minutes to allow the SRS capacitors to discharge.
• Move the seat to gain access, remove seat trim and covers to reach the airbag module mounting points.
• Unplug the airbag electrical connector(s) using manufacturer procedures to avoid damage to locking tabs.
• Remove retaining bolts/clips and carefully extract the airbag module from the seat.
• Install the new module in reverse order, ensuring connectors are fully engaged and mounting fasteners are torqued to the vehicle manufacturer’s specification.
• Reconnect the battery and use a diagnostic tool to check the SRS system, clear fault codes and confirm proper system status.

Installation Recommendations

• Always disconnect the battery before starting work on any SRS components and follow the vehicle manufacturer’s safety procedures.
• Handle the airbag module with the trim side facing away from you; never place a deployed or undeployed airbag face down on a surface.
• Replace any damaged seat‑mounted wiring harnesses or connector housings rather than attempting repairs that could compromise the SRS circuit.
• After installation, run a full SRS system check with a compatible diagnostic tool and confirm that no persistent fault codes remain.

Why The Part Most Often Fails

• Previous deployment in a crash – Once deployed, the airbag must be replaced.
• Connector or Wiring Damage – Faulty contacts, broken wires under the seat (due to seat movement) or corrosion can produce open or short circuits detected by the SRS system.
• Water Ingress – Moisture from spills or leaks can damage the connector and electronics.
• Electrical Faults – Squib or inflator circuit failures detected as SRS faults on the instrument cluster.
• Physical Damage – Seat impact or improper handling during repairs can damage the module.

How Often Replacement Is Required

Seat airbags are generally maintenance-free and are only replaced after deployment, when a fault is diagnosed by the vehicle’s SRS system, or if the module or wiring suffers physical damage. There is no routine service interval; replacement is condition-driven.

Notes For Professionals And DIYers

• Use correct OEM or equivalent part numbers (9687158380 / 8217F7) for fitment to Citroën C4 II (B7) and DS4 models.
• Do not attempt to test the airbag inflator with live power or improvised methods; always use proper diagnostic procedures.
• Record any SRS fault codes and confirm system readiness after installation to ensure legal and safe vehicle operation.

Order this driver seat airbag with the referenced codes to restore occupant protection and clear SRS faults for Citroën C4 II and DS4 vehicles. Suitable for professional workshops and experienced self-repairers who follow SRS safety procedures.