Description
ABL Acceleration Sensor – Side Impact for CITROËN C1, PEUGEOT 107 and TOYOTA AYGO up to 2013
Description
This side impact acceleration sensor (ABL) is designed for the airbag system of Citroën C1, Peugeot 107 and Toyota Aygo (models produced up to 2013). The sensor detects lateral accelerations during a side collision and sends the signal to the airbag control unit to trigger side airbags and pretensioners when required. Commonly searched by part numbers, this component is an essential safety element after collisions or when diagnosing side airbag faults.
Technical Information
- Manufacturer: Stellantis (Citroën, Peugeot); Toyota Compatible
- Model: Citroën C1, Peugeot 107, Toyota Aygo (up to 2013)
- Product Codes: 89831-02020, 8216HY
- Additional Numbers: NFP
Function
The sensor measures lateral acceleration (side impact) and communicates directly with the airbag control unit. When a threshold is exceeded, the control unit deploys side airbags and activates seat belt pretensioners to protect occupants. Proper orientation and secure mounting are critical for correct operation.
Compatibility And Fitment
Designed for vehicles on the Toyota/PSA platform shared by Citroën C1, Peugeot 107 and Toyota Aygo manufactured until 2013. The sensor is typically located in the B-pillar area or near the seat belt anchorage—refer to the vehicle repair manual for the exact position on a specific model.
Replacement And Installation
- Always follow Manufacturer Procedures: Disconnect the negative battery terminal and wait the recommended time before starting work to avoid accidental airbag deployment.
- Remove Interior Trim: Carefully remove the trim panels covering the sensor location (B-pillar or seat belt area) to access the sensor and connector.
- Disconnect Connector: Unplug the wiring connector and inspect for corrosion or damaged pins.
- Unbolt Sensor: Remove the mounting fasteners and replace the sensor with the new unit, maintaining the original orientation and position.
- Torque And Final Checks: Tighten fasteners to the manufacturer torque specification and reconnect the battery. Verify with a diagnostic scanner that the airbag control unit reports no fault codes and that the new sensor is recognized.
- If In Doubt: Installation and post-replacement diagnostics should be performed by a qualified technician with appropriate airbag safety procedures and diagnostic tools.
Why The Part Commonly Fails
- Collision Damage: The most frequent cause is physical damage in a side impact—after a crash the sensor or mounting can be deformed or destroyed.
- Connector Corrosion Or Wiring Damage: Moisture ingress and corrosion in connectors or damaged wiring can cause intermittent or permanent faults.
- Water Ingress And Environmental Exposure: Rust and moisture can impair sensor electronics over time.
- Electrical Faults In Airbag Circuit: Short circuits, open circuits or poor grounding can lead to sensor malfunction reports on the control unit.
Recommendations
- Diagnose First: Read airbag fault codes with a compatible diagnostic tool before replacing the sensor to confirm the sensor is the root cause.
- Replace After Deployment: Replace the sensor and any related components after airbag deployment—components may be damaged or no longer reliable after an event.
- Inspect Wiring And Connectors: Always inspect and, if necessary, repair the wiring harness and connectors when replacing the sensor to prevent recurring faults.
- Follow Safety Precautions: Observe all airbag safety procedures during removal and installation to prevent accidental deployment and injury.
