Description
Side Impact Sensor (Crash Sensor) for Citroën and Peugeot Vehicles
Stellantis Citroën Peugeot — Part Numbers: 9636982680, 8216H3, 550903000 NFP. This side impact sensor is intended as a direct-fit replacement for affected Citroën and Peugeot models and is commonly searched by its OEM and supplier codes. Suitable for mechanics and competent DIYers performing SRS system repairs.
Application And Function
The Side Impact Sensor monitors lateral acceleration and impact forces and sends an immediate signal to the airbag control unit to deploy side and curtain airbags when a significant side collision is detected. Correct operation of this sensor is critical for timely airbag deployment and occupant protection in side-impact events.
Technical Information
- Manufacturer: Stellantis / Citroën / Peugeot
- Model: Citroën Berlingo, Citroën C5, Citroën Xsara, Citroën Xsara Picasso, Peugeot 206, Peugeot 407, Peugeot Partner
- Product Codes: 9636982680, 8216H3
- Other Numbers: 550903000, NFP
Recommended Installation
- Always follow the vehicle manufacturer’s service manual. Before starting, disconnect the negative battery terminal and wait to allow the SRS capacitors to discharge (follow manufacturer-specified waiting interval).
- Access the sensor by removing the relevant interior trim (commonly mounted in the B-pillar, door structure or seat base depending on model). Keep trim clips and fasteners in good order.
- Unplug the sensor electrical connector and remove mounting fasteners. Replace with the new sensor in the exact orientation and position as the original unit.
- Reinstall fasteners and trim, reconnect the battery, and use an SRS-capable diagnostic tool to clear fault codes and verify that the airbag warning lamp extinguishes after system checks.
- Do not attempt to repair the sensor wiring or internal electronics; install a correct replacement part to ensure system reliability.
Most Common Failure Causes
- Physical Damage From A Collision: Sensors may be damaged in a prior impact and must be replaced to restore SRS functionality.
- Water Ingress And Corrosion: Moisture entering the sensor or connector can corrode contacts and cause electrical faults.
- Connector Or Wiring Faults: Loose, broken, or corroded connectors and wiring can produce intermittent or permanent faults.
- Age And Environmental Stress: Vibration, thermal cycling and long-term exposure can degrade internal components or solder joints.
- Improper Installation After Repair: Incorrect orientation, loose mounting, or damaged connectors during reassembly lead to errors or non-deployment risks.
Notes For Mechanics And DIYers
- Search By Part Number: Customers frequently look up this sensor by OE codes 9636982680 and 8216H3 — include those codes when ordering to ensure compatibility.
- Safety First: Work on SRS components only if you are trained and equipped to do so. Always follow safety procedures to avoid accidental airbag deployment.
- Verification: After replacement, verify the SRS system status with a diagnostic scanner and confirm that no residual crash codes remain.
- Inspection Tip: Check surrounding mounts and wiring harnesses for hidden damage after any side impact; replacing the sensor alone may not resolve related faults.
This sensor is a crucial safety component. Use correct part numbers and installation procedures to maintain full occupant protection and SRS system integrity.
