Description
Clock Spring For Airbag, Horn And Car Radio For Citroën And Peugeot Vehicles
Replacement clock spring (rotary contact / spiral cable) designed for Citroën and Peugeot steering systems. This unit restores the electrical link between the steering wheel and vehicle electronics, including the driver airbag circuit, horn and steering wheel radio/controls. Frequently searched under product codes 9635682680 and 4112CP, it is a common spare part for Berlingo I, Partner I, Xsara, Xsara Picasso and Peugeot 306 models. Ideal for professional mechanics and experienced DIYers who need a direct-fit solution to eliminate faults such as airbag warning lights, non-functional horn or inoperative steering wheel buttons.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Berlingo I; Partner I; Xsara; Xsara Picasso; Peugeot 306
- Product Codes: 9635682680, 4112CP
- Other Numbers: NFP
Function And Symptoms
The clock spring provides continuous electrical continuity between stationary vehicle wiring and rotating steering wheel components. It transmits signals and power for the driver airbag, horn and steering wheel-mounted controls (radio, phone buttons, etc.). Typical failure symptoms include persistent airbag warning lamp, loss of horn function, intermittent or permanent failure of steering wheel buttons, and occasionally rubbing or clicking noises behind the steering wheel.
How The Part Is Replaced
- Disconnect the negative battery terminal and wait at least 10 minutes to allow the Supplemental Restraint System to discharge.
- Center the front wheels and the steering wheel. Mark the steering wheel position relative to the shaft to ensure correct re-alignment.
- Remove the airbag module following manufacturer procedures and safety rules. Disconnect airbag and clock spring connectors carefully.
- Remove the steering wheel (a steering wheel puller may be required) and unfasten the clock spring retaining screws/clips.
- Fit the replacement clock spring in its neutral (centered) position. Do not rotate the unit while it is uninstalled. Reconnect all electrical connectors and reassemble in reverse order.
- Reconnect the battery and verify system status. Torque the steering wheel retaining nut to the manufacturer specified value.
Installation Recommendations
- Always Disconnect Battery Before Work: Disconnect the negative terminal and wait to avoid accidental airbag deployment.
- Center The Clock Spring: Ensure the new clock spring is in the centered (neutral) position before installation to prevent cable damage.
- Use Correct Tools: Torx sockets, steering wheel puller and torque wrench are commonly required.
- Observe Connector Latches: Make sure airbag and signal connectors are fully engaged and secured.
- If Unsure, Seek Professional Support: Airbag work involves safety risks—proceed only if experienced with SRS systems.
Why This Part Fails Most Often
- Wear And Fatigue Of The Ribbon Cable: Repeated steering rotations eventually cause the internal flex ribbon to crack or break.
- Over-Rotation Or Misalignment: Incorrect installation or forcing the steering beyond physical stops can damage the spiral cable.
- Corrosion And Dirt Ingress: Moisture or contaminants can accelerate electrical contact failure.
- Damage From Airbag Deployment Or Previous Repairs: Impact or poor previous repair work can deform or break the unit.
Search By Part Number: For quick identification use 9635682680 or 4112CP. The unit listed fits common Citroën and Peugeot models as specified above and is aimed at restoring full function to the airbag, horn and steering wheel controls.
