By RunningRoo Auto Parts — written from the desk of our Product Manager
Behind your steering wheel sits a small but critical part called the clock spring, or spiral cable — a flat ribbon of wires wound inside a housing that lets the airbag, horn and steering-wheel controls stay connected while the wheel turns. When it fails, the airbag light comes on, the horn and buttons stop working, and the airbag may not deploy in a crash. Replacing a clock spring is a delicate job that must be done with the airbag system safely disabled, but it is well within reach for a careful owner. This guide explains what the clock spring does, how to recognise a failure and how to replace it safely.
RunningRoo Auto Parts – Based in Melbourne, Australia 🇦🇺
📞 Free 24/7 Pickup Available (Contact 0425890125)
💬 Any questions? Message or Call us anytime! We’re here to help.Why Choose RunningRoo?
✅ Aussie Owned & Operated | 🚚 Fast Shipping | 🤝 Friendly Support
What the clock spring does
The clock spring is a coiled ribbon cable mounted between the steering wheel and the steering column. It provides a continuous electrical connection to the airbag, horn and steering-wheel controls while allowing the wheel to rotate several turns in each direction. The name comes from its construction — a flat flexible cable wound like a clock spring inside a plastic cassette.
Over time the ribbon can fatigue and break, the internal contacts can wear, or the cassette can be damaged by a hard turn, an airbag deployment or careless steering work. When the ribbon breaks, the circuits to the airbag and controls open, and the car usually illuminates the airbag warning light.
The symptoms of a failing clock spring
The most common symptom is an airbag warning light that will not clear, often with a code for the driver’s airbag circuit. The horn may stop working, the steering-wheel buttons for audio or cruise control may go dead, and in some cases the steering makes a scraping or clicking sound when turned. These symptoms can appear together or one at a time.
| Symptom | Likely cause | Check |
|---|---|---|
| Airbag light, driver circuit code | Clock spring ribbon open | Scan airbag codes |
| Horn stopped working | Clock spring or relay | Test the horn circuit |
| Steering buttons dead | Clock spring | Test the button circuits |
| Scraping when turning | Cassette damaged | Inspect the clock spring |
Safety first: the airbag system
Before touching the clock spring, the airbag system must be disabled and allowed to discharge. Disconnect the battery and wait at least the time specified by the manufacturer before unplugging the airbag, and treat the airbag as an explosive device — never probe it with a multimeter, and keep the airbag face away from you when handling it.
If you are not confident working around the airbag, have a professional do the job. A correctly fitted clock spring restores the airbag, horn and controls, while a careless job can deploy the airbag or leave it inoperative.
Replacing the clock spring correctly
The job starts with disabling the airbag, removing the airbag module, and undoing the steering wheel nut with the wheel marked so it goes back in the same position. The old clock spring is unbolted, and the new one is fitted with its centring tab in place, so the ribbon is centred before the wheel goes back on. The wheel is then refitted, the airbag reconnected and the system scanned to confirm the airbag light is out.
The most common mistakes are failing to centre the new clock spring before fitting the wheel, which causes the ribbon to tear on the first full lock, and leaving the airbag connector loose. Take your time and follow the centring procedure for your vehicle.
Clock spring vs steering angle sensor
On many modern cars the clock spring and the steering angle sensor are fitted together behind the wheel, but they are separate parts with separate jobs. The clock spring carries the electrical circuits for the airbag, horn and controls, while the steering angle sensor measures the steering wheel position for stability control. Some designs combine them into one unit, which matters when ordering the replacement.
If the stability or traction-control light comes on together with the airbag light, the steering angle sensor may also need to be recalibrated or replaced. Confirm whether your vehicle combines the two before ordering, and match the part by vehicle and part number.
The most common clock spring fault codes
The codes that point to a clock spring are stored in the airbag controller, usually a driver’s airbag circuit code such as a high-resistance or open-circuit fault. Some cars log a steering-angle sensor code as well when the clock spring is damaged. Reading the airbag controller’s codes confirms which circuit is open and narrows the fault to the clock spring, the connector or the airbag itself.
Because the airbag system is safety-critical, never ignore an airbag light. A fault in the clock spring circuit means the driver’s airbag may not deploy, so the repair should be done promptly and the system scanned afterwards to confirm the light is out.
Preventing clock spring damage
The most common cause of avoidable clock spring damage is steering work done with the wheel free to spin, which winds the ribbon past its limit and tears it. When doing any steering or suspension work, keep the steering locked or centred so the clock spring does not over-rotate. Avoid spinning the wheel from lock to lock with the engine off for the same reason.
Replacing the clock spring with a correctly centred unit, and keeping the wheel centred during any related work, is the best way to make the new part last for the life of the car.
Frequently asked questions
What is a clock spring?
It is the spiral ribbon cable behind the steering wheel that connects the airbag, horn and steering-wheel buttons while the wheel turns.
What are the symptoms of a bad clock spring?
An airbag warning light, a dead horn or steering-wheel buttons, and sometimes a scraping noise when turning.
Can I replace a clock spring myself?
Yes, with care, but the airbag system must be safely disabled first. If unsure, have a professional do it.
Do I need to centre the new clock spring?
Yes. The ribbon must be centred before fitting the wheel, or it can tear on full lock.
How much does a clock spring cost in Australia?
A quality aftermarket clock spring is inexpensive, and the job is usually a couple of hours.
Will a bad clock spring stop the airbag from working?
Yes. If the ribbon is broken, the driver’s airbag may not deploy, which is why the airbag warning light comes on.
Is the clock spring the same as the steering angle sensor?
They are separate parts but are often fitted together, and some designs combine them. Confirm your vehicle’s design before ordering.
Key takeaways
A clock spring failure shows up as an airbag light, a dead horn or steering-wheel buttons, and the repair is a delicate but manageable job once the airbag system is safely disabled. Centring the new clock spring before fitting the wheel is the single most important step, because an off-centre ribbon tears on the first full lock.
Never ignore an airbag light, because a broken clock spring circuit means the driver’s airbag may not deploy. A correctly fitted clock spring restores the airbag, horn and controls and keeps the safety system complete.
How to order the right clock spring
Clock springs differ by the number of turns, the number of circuits and whether the steering angle sensor is combined into the same unit. Order by vehicle, build year and the original part number, and confirm whether your car has steering wheel audio or cruise controls, because a clock spring without the right circuits will leave those buttons dead.
Send the VIN or the original part number to the supplier to confirm fitment, and check whether the new part needs to be centred before fitting. Getting the correct part the first time avoids an airbag light that will not clear because the wrong clock spring was fitted.
Step-by-step clock spring replacement
The job begins with disabling the airbag system: disconnect the battery and wait the specified time for the system to discharge. Remove the airbag module carefully, then undo the steering wheel nut with the wheel marked so it returns to the same position. Unbolt the old clock spring and disconnect its connectors.
Fit the new clock spring with its centring tab in place so the ribbon is centred, then refit the steering wheel, reconnect the airbag and restore the battery. Clear the airbag codes and confirm the light stays out and the horn and steering-wheel buttons work.
After replacement: what to check
After fitting, turn the steering from lock to lock gently and listen for any scraping that would indicate the ribbon is binding. Confirm the airbag light is out, the horn works, and the steering-wheel buttons for audio and cruise control respond. If the steering-angle sensor was disturbed, check that the stability-control light is also off, and recalibrate it if required.
A correctly centred clock spring should give no noise and full function immediately. Any scraping on full lock means the centring was wrong, and the wheel should come off again before the ribbon tears.
Will disconnecting the battery clear the airbag light?
Usually not for a clock spring fault. The airbag controller stores the code until the fault is repaired and the code is cleared with a scan tool.
Can a clock spring fail after an airbag deployment?
Yes. The ribbon is often damaged during deployment, so the clock spring should be replaced along with the deployed airbag.
Do I need to disable the airbag before replacing the clock spring?
Yes, absolutely. The battery must be disconnected and the system allowed to discharge before any airbag work.
Can a clock spring be repaired rather than replaced?
Generally no. The ribbon and cassette are not serviceable, so the unit is replaced rather than repaired.
How long does a clock spring replacement take?
Usually one to two hours for an experienced DIYer or workshop, including the airbag system disable and the final scan to confirm the light is out.
Shop the parts mentioned in this guide
- Airbag Spiral Cable Clock Spring for Toyota Camry / Corolla / Prius 84306-48030
- Clock Spring Airbag Replacement for Mitsubishi Triton ML / MN 2005–2015 8619A017
- Steering Wheel Clock Spring Assembly for Hyundai Accent 2005–2010 934901G210
- Clock Spring for Nissan Pathfinder R51 2005–2015 25567-5X10A
Watch on RunningRooAuto YouTube
- RunningRoo Auto Parts – trusted Melbourne parts support
- RunningRoo Auto Parts – product and fitment channel
RunningRoo Auto Parts – Based in Melbourne, Australia 🇦🇺
📞 Free 24/7 Pickup Available (Contact 0425890125)
💬 Any questions? Message or Call us anytime! We’re here to help.Why Choose RunningRoo?
✅ Aussie Owned & Operated | 🚚 Fast Shipping | 🤝 Friendly Support
Sources and further reading
- Airbag — Wikipedia
- RACV — car maintenance and repair guidance
- CarsGuide — Australian motoring advice
- Bosch — automotive safety systems
RunningRoo Auto Parts – Based in Melbourne, Australia 🇦🇺
📞 Free 24/7 Pickup Available (Contact 0425890125)
💬 Any questions? Message or Call us anytime! We’re here to help.Why Choose RunningRoo?
✅ Aussie Owned & Operated | 🚚 Fast Shipping | 🤝 Friendly Support