Clock Spring (Airbag Spiral Cable) Buying Guide
Last updated: 24 April 2026
The clock spring — also known as a spiral cable, clockspring, or airbag clock spring — is a wound flat-ribbon electrical conductor inside the steering column that maintains a continuous electrical connection between the rotating steering wheel and the fixed wiring harness. It carries circuits for the driver's airbag, horn, cruise control stalk, and in some vehicles the audio and phone controls on the steering wheel. A failed clock spring is a serious safety concern because it can disable the driver's airbag or cause an inadvertent deployment. CarParts247 stocks replacement clock springs for the most common European and Asian platforms, including Ford, Vauxhall/Opel, Renault, Nissan, Toyota, and Volkswagen Group vehicles.
Symptoms of a faulty clock spring
Clock spring failure is usually signalled by the airbag warning light accompanied by a horn or steering wheel control fault. The airbag module stores a fault code that makes diagnosis straightforward.
- Airbag warning light illuminated — most common symptom
- Horn not working despite the relay and fuse being intact
- Steering wheel audio, cruise control, or phone stalk buttons non-functional
- Intermittent faults that clear when the steering wheel is in a certain position
- Clicking or crackling sound from the steering column when turning
Replacing the clock spring safely
Working near an airbag requires care. Disconnect the battery and wait at least 15 minutes for the airbag capacitor to discharge fully before starting. Lock the steering wheel in the straight-ahead position to avoid twisting the new clock spring beyond its travel limit during reassembly.
- Remove the airbag module before the clock spring — follow the vehicle-specific procedure
- Do not turn the steering wheel with the clock spring removed or it will exceed its wind count
- Centre the new clock spring before installation — most units have a red or yellow alignment lock tab
- Clear airbag fault codes and verify airbag warning light extinguishes after fitting
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Airbag warning light, horn failure, and cruise control loss — how a faulty clock spring is diagnosed and what to check before replacement.
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Frequently Asked Questions
Is it safe to drive with a faulty clock spring?
Not recommended. A failed clock spring may have disabled your driver's airbag, leaving you without frontal collision protection. Repair it promptly.
How do I know if the clock spring is the cause of my airbag light?
Read the airbag fault codes with a compatible diagnostic tool. Codes referencing the driver's squib circuit (typically B1231 or similar) or horn circuit open fault point to the clock spring.
Can I replace a clock spring without an airbag diagnostic tool?
You can physically replace the part without a tool, but you need a diagnostic tool to clear the stored airbag fault code afterwards. Without clearing the code, the airbag light will remain on.
How long does clock spring replacement take?
Around 1–2 hours for an experienced mechanic, including correct airbag disarming, steering wheel removal, and post-fit fault code clearing.
What causes clock spring failure?
The ribbon cable fatigues through repeated flexing over hundreds of thousands of steering cycles. The typical failure point is at the solder joint where the ribbon attaches to the contacts. High-mileage vehicles over 10 years old are most susceptible.
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