Description
Airbag Control Unit CITROËN C5 II. Condition unknown; the unit is fully functional, may require clearing crash data. Do not expose.
This activated airbag (SRS) control unit is a direct-fit replacement for Citroën C5 II vehicles and is commonly searched for by its OEM numbers. It’s suitable for professional workshops and experienced DIY mechanics who require a reliable unit to restore the vehicle’s restraint system after an incident or when diagnosing SRS faults. Including the OEM part numbers in the listing increases findability in search engines and helps you match the unit to the vehicle quickly.
Function And Fitment
The airbag control module (SRS unit) monitors crash sensors and decides when to deploy airbags and seatbelt pretensioners. It stores event and crash data (so-called CRASH data) and fault codes related to the restraint system. After a collision, the module may retain crash data that must be cleared or reinitialized before the vehicle’s SRS warnings are reset. This unit is intended for Citroën C5 II applications; compatibility with other models depends on matching OEM numbers listed below.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Citroën C5 II
- Product Codes: 9657456680
- Additional Numbers: 603481900, 6545V0, 6545V1
Installation Recommendations
- Disconnect the negative battery terminal before starting work and wait the recommended time to allow residual charge to dissipate (typically 10–15 minutes) to avoid accidental deployment.
- Locate the unit according to the vehicle repair manual (common mounting locations include under the centre console or beneath the front seats depending on trim and chassis).
- Handle the module carefully: avoid impact, moisture and electrostatic discharge. Protect connectors and wiring during removal.
- Document connector positions and mounting hardware. Remove securing bolts and electrical connectors cleanly; do not force seized plugs.
- After installation, clear SRS fault codes and, if required, clear CRASH data or reinitialize the module using a suitable diagnostic tool. Verify the SRS system status and perform a post-installation system check.
- For safety-critical systems like airbags, professional installation or validation with a qualified diagnostic device is recommended.
Most Common Failure Reasons
- Crash activation — the most frequent reason the unit is replaced is after an accident when the module records CRASH data.
- Water ingress and corrosion — moisture can damage the electronics or connectors, leading to faults.
- Electrical surges or poor grounding — battery issues, jump-starts or wiring faults can damage the unit.
- Connector damage or wiring harness faults — poor contacts produce intermittent SRS warnings.
- Age-related electronic component degradation — while uncommon, prolonged exposure to harsh environments can cause failures.
Replacement Notes
When fitting this unit, ensure OEM numbers match the vehicle requirements. After physical replacement, use a diagnostic tool to clear crash data and confirm the system shows no active SRS faults. If CRASH data is present, appropriate clearing or reprogramming may be required before the airbags and seatbelt pretensioners will function normally.
This listing includes the most commonly searched part numbers to help you find the correct airbag control unit quickly. Always follow the vehicle manufacturer’s safety procedures when servicing restraint systems.
