Description
Side impact sensor (impact sensor) for Citroën and Peugeot vehicles
The Side Impact Sensor 9636982680 / 8216H3 is an original-equipment type crash sensor designed for Citroën and Peugeot models. It detects lateral collisions and sends a signal to the airbag control unit to trigger side airbags and seatbelt pretensioners when required. This sensor is commonly referenced by part numbers 9636982680, 8216H3 and 550903000, so customers and technicians often search using these codes.
This part is intended for professional garages and DIY mechanics who perform safety-system repairs on Stellantis vehicles. It suits a range of Citroën and Peugeot models where the manufacturer uses this sensor type. Installation requires careful handling of the SRS wiring and proper resetting of fault codes after replacement to ensure the airbag system reports correctly.
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
- Additional Numbers: 550903000, NFP
Installation Recommendation
- Always follow SRS safety procedures. Disconnect the negative battery terminal and wait at least a few minutes to allow system capacitors to discharge before starting work.
- Access the sensor by removing the appropriate trim (door panels, B-pillar trim, or seat trim depending on model). Keep trim clips and fasteners safe for reassembly.
- Unplug the sensor connector carefully—do not pull on wiring. Remove mounting bolts and replace with the new unit, ensuring correct orientation and secure mounting.
- Reconnect the electrical connector and reassemble trim. Reconnect the battery and use a diagnostic tool to read and clear SRS fault codes. Verify that the airbag indicator goes out and perform a system check.
- Use manufacturer torque values and procedures where specified. If unsure about resetting or calibrating the SRS, have the final checks performed with a suitable diagnostic tool.
Why The Part Most Commonly Fails
- Collision Damage: The most frequent cause is involvement in a side impact or previous accident—after deployment or heavy impact the sensor is often damaged and should be replaced.
- Corrosion And Water Ingress: Moisture or corrosion at connectors and mounting points can cause intermittent signals or total failure.
- Wiring And Connector Damage: Pinched cables, broken wires, or damaged connector pins from improper handling or previous repairs.
- Mechanical Stress And Aging: Vibrations, repeated impacts on doors or pillars, or severe environmental exposure can degrade the sensor over time.
Fits vehicles that use part numbers 9636982680 / 8216H3 (see Technical Information). When replacing an SRS sensor, ensure correct mounting position and secure electrical connections — incorrect installation can prevent the airbag system from functioning properly.
