High-quality replacement Hazard Light Switch designed for Citroën C3 II (A51) models produced between 2009 and 2016. Ideal for professional mechanics and experienced DIY enthusiasts who search by part number (9669616KR, 6490CY). This switch restores reliable operation of the vehicle’s hazard warning lights and offers direct fitment into the original dashboard opening for a neat, factory look.

Application And Function

The switch controls the vehicle’s hazard warning lights (all indicators flashing simultaneously) and provides a clear, tactile actuator in the instrument panel. It is intended as a direct replacement part for vehicles originally equipped with the same mounting and connector layout. The hazard switch is a safety-critical component used whenever the vehicle is stopped in an emergency or presents a temporary hazard to other road users.

How To Replace

1. Always disconnect the battery prior to work to avoid short circuits or accidental airbag deployment.
2. Carefully remove the surrounding trim using plastic trim tools to avoid scratching or breaking clips.
3. Unscrew or unclip the retaining elements securing the switch module in the dash aperture.
4. Disconnect the electrical connector and remove the old switch.
5. Install the new switch, connect the electrical plug, secure the switch, and refit the trim.
6. Reconnect the battery and verify correct operation of hazard lights and indicator illumination.

Installation Recommendations

• Disconnect the battery before starting and follow manufacturer safety procedures.
• Use plastic trim removal tools to protect trim and clips.
• Inspect the wiring connector for corrosion or damaged pins; clean contact surfaces if required.
• If hazard lights still fail after replacement, check the associated fuses, the flasher relay (if applicable), and wiring continuity.
• Fitment is usually plug-and-play for matching part numbers; always confirm connector shape and mounting before final installation.

Most Common Failure Reasons

Hazard light switches typically fail due to mechanical wear of internal contacts after prolonged use, contamination from liquids or dust, broken actuator or mounting tabs from repeated removal, or electrical arcing that damages contact surfaces. Symptoms include intermittent operation, stuck switch, no illumination on the switch, or complete loss of hazard function.

Technical Information

• Manufacturer: Stellantis / Citroën
• Model: Citroën C3 II (A51) 2009–2016
• Product Codes: 9669616KR, 6490CY
• Other Numbers: 6490CY, 9669616KR

Notes For Professionals

This part is commonly searched and ordered by its product codes. When replacing electrical switches, verify connector pinout and inspect related components (fuse box, relay, wiring harness) to ensure complete restoration of functionality. Use recommended tools and follow safe work practices to avoid damage to trim, connectors, and surrounding systems.