Description
Airbag Control Unit for Citroën C1 and Peugeot 107. We do not know the condition of the unit; it is reported as fully functional, but it may require clearing CRASH data.
This SRS airbag control module (airbag ECU) is intended for first‑generation Citroën C1 and Peugeot 107 vehicles and is frequently searched for by its part number 89170-0H020. The unit manages deployment logic and stores crash events and SRS fault codes. It is a suitable replacement for workshops and experienced DIY mechanics who need a direct‑fit control module to restore airbag system functionality after faults or post‑accident interventions.
The module is a critical safety component: it monitors crash sensors, seat belt pretensioners and airbag circuits, decides when to trigger airbags during an impact, and logs crash data. Because of its role, the unit is usually replaced or reset only after a vehicle impact, persistent SRS warning lamp, or proven electrical fault.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Citroën C1, Peugeot 107 (first generation)
- Product Codes: 89170-0H020
- Additional Numbers: 891700H020 (alternate formatting)
Installation Recommendations
- Always follow SRS safety procedures. Disconnect the negative battery terminal and wait at least 10 minutes before starting work to reduce the risk from stored capacitor energy.
- Remove interior trim panels as required to access the airbag control unit location. Work carefully around connectors to avoid damaging pins or locking tabs.
- Unbolt the module using the correct size tools and note bracket orientation for correct reinstallation. Avoid bending or deforming the unit during removal.
- After fitting, reconnect the battery and use a compatible diagnostic tool to read and clear SRS fault codes. If CRASH data is present, a suitable PSA/diagnostic device (e.g., manufacturer or aftermarket tool that supports SRS procedures) will be required to clear or reprogram the unit according to vehicle specifications.
- After clearing codes, perform a full SRS system check to confirm the airbag warning lamp extinguishes and that there are no stored faults.
Why This Part Fails Most Often
- Airbag deployment: The most common cause of a non‑functional or locked airbag control unit is activation during a collision — the module records crash data and usually needs clearing or replacement.
- Electrical Damage: Short circuits, voltage spikes, or incorrect jump‑starting can damage internal electronics or corrupt memory.
- Corrosion and Moisture: Water ingress or corroded connectors can interrupt sensor circuits or communications with the ECU.
- Connector/Pin Damage: Rough handling during previous repairs or poor reconnection can cause intermittent faults and SRS warnings.
- Age and Environmental Stress: While these units are designed for long life, exposure to heat and vibration over many years can contribute to failure.
Typical service approach: Replace the module or clear crash data only when required. Because the SRS system is a safety system, replace or reset the unit following manufacturer‑recommended procedures and verify correct operation with diagnostic equipment. Searching by the OE part number 89170-0H020 will help you quickly find compatible units and technical references.
Suitable For: Professional Auto Technicians And Experienced DIYers Familiar With SRS Safety Procedures And Diagnostics.
