Description
Acceleration Sensor – Side Impact Sensor For Stellantis Group Vehicles.
Description
High-quality acceleration (side impact) sensor designed for Citroën, Peugeot and other Stellantis group vehicles. This sensor (searchable under part numbers 9810452480 and 9852080480) monitors lateral acceleration and provides fast, reliable input to the airbag (SRS) control module to ensure timely deployment of side airbags and seatbelt pretensioners in the event of a side collision. Ideal for professional workshops and experienced DIY mechanics performing SRS repairs or post-accident replacements.
Function
The sensor measures lateral acceleration and transmits a signal to the Supplemental Restraint System (SRS) control unit. When the measured deceleration exceeds predefined thresholds, the control unit evaluates the signal and, if conditions are met, triggers the appropriate restraint devices (side airbags, curtain airbags, and pretensioners). Reliable sensor performance is critical for occupant safety and correct SRS operation.
Compatibility
- Citroën C3 Aircross
- Citroën Berlingo III
- Citroën C3 III
- DS Models (where applicable)
- Fiat Doblo III
- Opel Combo E
- Peugeot 2008
- Peugeot 208
- Peugeot Partner III
- Peugeot Rifter
- Toyota ProAce City
Installation And Replacement
Typical replacement steps for a trained technician or competent DIY mechanic:
- Disconnect the vehicle battery and wait the recommended time for system discharge before starting work.
- Remove interior trim panels to access the sensor (commonly located in the B-pillar, door structure, or seat area depending on model).
- Unplug the electrical connector and remove the sensor mounting fasteners.
- Install the replacement sensor, secure fasteners to the manufacturer’s torque specifications and reconnect the electrical connector.
- Reconnect the battery, then clear SRS fault codes and perform an SRS system check/initialization with a diagnostic tool that supports airbag systems.
- Verify that no SRS warning lights remain and perform a final road test as required by the service manual.
Installation Recommendations
- Always follow the vehicle manufacturer’s service manual and torque specifications.
- Disconnect the battery before starting and avoid creating static discharge near the SRS components.
- Do not drop or hit the sensor; handle with care to avoid damaging internal electronics.
- Ensure electrical connectors and harnesses are clean, corrosion-free and fully seated.
- After replacement, use a diagnostic tool capable of reading and clearing SRS faults to confirm correct operation.
Most Common Failure Reasons
- Damage From Previous Collision: Sensors can be physically damaged in an impact and must be replaced after significant collisions.
- Moisture Ingress And Corrosion: Water penetration and connector corrosion lead to intermittent or permanent failures.
- Electrical Faults: Wiring harness damage, connector wear or short circuits can prevent proper signal transmission.
- Mechanical Shock Or Ageing: Long-term vibration, impacts or manufacturing defects may degrade sensor accuracy over time.
Technical Information
- Manufacturer: Stellantis
- Model: Acceleration Sensor / Side Impact Sensor
- Product Codes: 9810452480
- Other Numbers: 9852080480
Note For Safety
Replacement of SRS-related components affects vehicle safety systems. If you are not fully confident in performing this work, have the replacement and subsequent diagnostic checks carried out by a qualified technician with the appropriate tools and experience.
