Description
Acceleration Sensor – Side Impact Sensor for Stellantis Group Vehicles
High-quality used acceleration (side impact) sensor designed for a wide range of Stellantis Group vehicles including Citroën, Peugeot, DS, Fiat, Opel and Toyota applications. This sensor (OE references 9810452480 / 9852080480) provides reliable lateral acceleration data to the airbag control system (SRS), helping ensure timely deployment of side airbags and pretensioners in the event of a collision. Ideal for professional workshops and experienced DIY mechanics looking for a direct-fit replacement part compatible with many small-utility and compact models.
Function
The Side Impact/Acceleration Sensor measures lateral forces acting on the vehicle and sends this information to the airbag control unit. When a threshold is exceeded, the control unit evaluates the signal and may trigger side airbags and seatbelt pretensioners. Correct operation of this sensor is critical for the SRS system’s crash detection logic and occupant protection.
Technical Information
- Manufacturer: Stellantis (OEM for Citroën / Peugeot / DS / Fiat / Opel)
- Model(s): Citroën C3 Aircross; Citroën Berlingo III (K9); Citroën C3 III; DS (compatible models as fitted by Stellantis); Fiat Doblo III; Opel Combo E (K9); Peugeot 2008; Peugeot 208; Peugeot Partner III; Peugeot Rifter; Toyota ProAce City
- Product Codes: 9810452480, 9852080480
- Other Numbers: Common OE references used on Stellantis platforms (see product codes above)
How To Replace
- Safety first: Disconnect the negative battery terminal and wait the manufacturer-recommended time for SRS capacitors to discharge before working on the vehicle.
- Locate the sensor: Depending on the model, side impact sensors are typically mounted in the B-pillar, behind interior trim panels, under seats or in the door frame area. Remove the necessary trim pieces to access the module.
- Disconnect the electrical connector carefully to avoid damaging pins or locking tabs.
- Remove fasteners and extract the old sensor. Compare the new unit with the removed part to confirm correct type and orientation.
- Install the replacement sensor, secure fasteners to the original torque specification if available, and reconnect the connector.
- Reassemble trim, reconnect the battery and clear SRS fault codes using a diagnostic tool. Confirm correct operation by checking that no SRS warning light remains illuminated.
Installation Recommendations
- Always Disconnect The Battery Before Starting Work And Follow Manufacturer Procedures To Avoid Damage To The SRS System.
- Use Appropriate Trim Tools To Prevent Breakage Of Interior Panels.
- When Reconnecting, Ensure Connector Pins Are Clean And Free From Corrosion; Secure Locks Fully.
- After Replacement, Clear And Verify SRS Fault Codes With A Professional Diagnostic Scanner; If Faults Persist, Inspect Wiring And Ground Points.
- For Proper Safety System Functionality, Calibration Or A System Check With Diagnostic Equipment Is Recommended After Replacement.
Reason For Most Common Failures
- Direct Collision Or Impact Damage: Sensors Can Be Physically Damaged During Side Impacts Or Minor Accidents.
- Water Ingress And Corrosion: Moisture Penetration Or Road Salt Can Corrode Connectors Or Sensor Housing.
- Connector Or Wiring Damage: Chafed Wiring, Poor Grounds Or Pin Damage Can Cause Intermittent Or Complete Failure.
- Electronic Faults: Internal Component Failure Due To Age, Vibration Or Manufacturing Defects Can Lead To Erroneous Signals.
- SRS Warning Light Or Fault Codes: The Most Common Symptom Indicating A Faulty Sensor Is The Airbag Warning Light Illumination.
Replacement of the side impact sensor is typically necessary after a collision that deployed or damaged safety components, or when diagnostics indicate sensor faults. For workshop efficiency, have OE product codes 9810452480 and 9852080480 available when sourcing the correct spare.
