How to Replace the Airbag?
As this is a part of a system containing pyrotechnic elements, we recommend the installation of the airbag only by an authorized technician to ensure proper function and safety.

Technical Information:

• Manufacturer: PSA
• Model: Peugeot 307
• Product Codes: 51108919, 8216L2
• Other Numbers: 8216FH

This passenger seat airbag module is a direct-fit safety component intended for Peugeot 307 vehicles and is often searched for by part numbers 5217821, 8216FH or 8216AW. Designed for mechanics and experienced DIYers, the unit restores occupant protection on the front passenger side after deployment or damage. Note that the electrical connector and wiring harness are not supplied with this item.

Technical Information

• Manufacturer: Stellantis (Citroën / Peugeot)
• Model: Peugeot 307 (First Generation)
• Product Codes: 5217821, 8216FH, 8216AW
• Additional Numbers: 5217821

Compatibility And Fitment

Fits Peugeot 307 passenger seats from the first-generation model range. Always verify the part numbers stamped on the original airbag module or the vehicle’s service documentation before installation. Common search terms include “Peugeot 307 passenger seat airbag 5217821” and the listed code variants.

Function

The seat airbag is an SRS component that inflates in the event of a qualifying frontal or side impact to reduce injury to the front-seat passenger. It works together with seat belts and the vehicle’s restraint control module to provide coordinated protection.

Replacement Procedure (Overview)

• Disconnect the negative battery terminal and wait at least 10 minutes to allow SRS capacitors to discharge.
• Remove seat trim and any trim clips covering the airbag module according to manufacturer instructions.
• Unbolt the airbag module from the seat structure, carefully release the electrical connector locking tab and disconnect the plug.
• Install the new airbag module, reconnect the plug ensuring a secure locking engagement, and resecure all trim and fasteners.
• Reconnect the battery and clear SRS fault codes with an appropriate diagnostic tool. Verify that the airbag warning light extinguishes and perform a final function check.

Installation Recommendations

Work should be performed by a qualified technician or a competent DIYer familiar with SRS systems. Always follow vehicle manufacturer service instructions. Use appropriate tools, avoid excessive force when handling the airbag, and do not expose the unit to heat, sparks or static discharge. Tighten mounting hardware to the manufacturer’s specified torque and ensure connectors are free of corrosion and fully seated. After installation, clear and check SRS fault codes with a diagnostic scanner.

Most Common Failure Causes

The most frequent reasons a seat airbag needs replacement are deployment during a collision and physical damage to the module or its connector. Other common causes include damaged or corroded wiring/connectors due to spills or prolonged moisture exposure, and incorrect repair or handling during seat removal. An illuminated airbag warning light or stored SRS fault codes typically indicate a problem that requires diagnosis and replacement when the module is faulty.