Description
Driver’s seat airbag for Citroën C8 and Peugeot 807. Color HZR – Gray Astrakhan.
This left side seat airbag is an OEM-fit safety component designed for Citroën C8 and Peugeot 807 models. Ideal for professional workshops and DIY mechanics, the unit restores side-impact protection for the driver seating position. The part is commonly sought by its product codes (5129066 / 5252940 / 8216NQ), so including these numbers in searches will improve findability.
Function
The seat airbag is part of the vehicle’s Supplemental Restraint System (SRS). In a qualifying side impact or rollover event the module rapidly inflates to reduce lateral torso and pelvic injuries. Proper electrical connection and secure mechanical mounting are essential for reliable deployment and SRS system integrity.
How Replacement Is Performed
- Disconnect the vehicle battery and wait the manufacturer-recommended time for residual charge to dissipate (consult the vehicle service manual).
- Remove seat trim and any plastic covers to access the airbag module mounting points.
- Carefully unplug the airbag electrical connector(s), observing connector locking mechanisms and avoiding contact with exposed terminals.
- Unbolt the airbag module from the seat frame and replace with the new unit, ensuring correct orientation (left/right) and that the inflator faces the correct direction according to the seat design.
- Reconnect the electrical connector(s) securely, refit trim, and reconnect the battery.
- Use a diagnostic tool to check SRS fault memory and to confirm the airbag circuit is OK. Clear any stored fault codes only after verifying the repair.
Technical Information
- Manufacturer: Stellantis / Citroën / Peugeot
- Model: Citroën C8, Peugeot 807
- Product Codes: 5129066, 5252940, 8216NQ
- Additional Numbers: 8216NQ (alternative reference)
Mounting Recommendations
- Always disconnect the negative battery terminal and wait the time recommended by the vehicle manufacturer before working on SRS components.
- Handle the airbag module by its housing only; avoid touching the inflator or connector pins.
- Use correct fasteners and torque values as specified in the vehicle repair manual. Improper torque can affect deployment behavior.
- After installation, perform an SRS system check with a diagnostic scanner to confirm there are no error codes and that the airbag warning lamp behaves correctly.
- When in doubt, have the final safety checks performed by a qualified technician experienced with Citroën/Peugeot SRS systems.
Reason Why The Part Most Often Fails
Seat airbags most commonly require replacement after deployment in a collision. Other frequent causes of failure include water ingress or corrosion of connectors (from spills or long-term moisture), physical damage to the seat structure during previous repairs, and electrical faults in the connector or wiring harness. Damage from improper removal or reinstallation can also render the unit inoperative.
Search Tips
Customers and workshops frequently search using the product codes 5129066, 5252940, or 8216NQ and the vehicle model names (Citroën C8, Peugeot 807). Including these references in a search will return the correct seat airbag for the driver’s left side.
