warning light guide
Airbag (SRS) Warning Light
The airbag warning light means the supplemental restraint system has found a fault and switched itself off. Your car will drive normally, but the airbags and seatbelt pre-tensioners will not trigger in a crash.
What it looks like: A red or amber symbol showing a seated passenger with a large circle in front of them, or the letters SRS or AIRBAG. On most cars it stays on continuously, but on some models it may flash before staying solid.
Updated 9 November 2026
Can I keep driving?
Service soon
The car is drivable, but you and your passengers have no airbag protection if a collision happens.
What to do right now
- 1Check that nothing is trapped tightly under the front seats against the wiring.
- 2Make sure the front passenger airbag deactivation switch in the glovebox or door frame was not turned off by mistake.
- 3Drive with extra caution and arrange for a garage to read the fault codes promptly.
Likely causes
Most likely first.
- Likely
Loose wiring connector under the front seat
Moving the front seats backwards and forwards or vacuuming under them tugs the yellow electrical plugs, breaking connection to the side airbags or seatbelt tensioners.
- Possible
Broken steering wheel clock spring
The spiral cable inside the steering column wears through from years of turning, severing communication with the driver's front airbag.
- Possible
Faulty passenger seat occupancy sensor
The pressure-sensitive mat inside the passenger seat base can fracture when heavy or sharp items are pressed into the cushion.
- Possible
Corroded crash impact sensor
Sensors mounted behind the front bumper or inside the door pillars are exposed to road moisture and road salt, causing terminal corrosion over time.
- Rare
Low 12-volt battery voltage
A weak or failing 12-volt battery causes system voltage to drop during engine cranking, which triggers a low-voltage communication fault in the airbag control module.
What you can check yourself
Park somewhere safe and level, engine off, before you start.
- 1
Check the passenger airbag switch
Locate the key switch in the glovebox or the side of the passenger dashboard. Confirm it is turned to the activated position rather than off.
- 2
Inspect under-seat plugs visually
Switch off the engine and take the key out of the ignition. Look under both front seats for loose yellow plastic connectors or items jammed against the wiring harness.
- 3
Test steering wheel controls and horn
Turn the wheel lock to lock with the engine running and test the horn and cruise control buttons. If they stop working or you hear a faint clicking behind the wheel, the clock spring has likely broken.
- 4
Test your 12-volt battery health
Check your battery condition at a motor factors or with a voltmeter. A tired battery that dips below 10 volts when starting can log ghost airbag faults.
Rough cost to fix
Rough estimateTypical prices in Ireland (€) and the UK (£), from an independent garage up to a main dealer. Prices depend mainly on whether an interior seat cushion or steering column has to be dismantled to reach the faulty component.
Under-seat wiring repair or plug replacement
- Do it yourself
- Garage job
- At a garage
- €80–180£70–150 in the UK
Steering wheel clock spring replacement
- Do it yourself
- Garage job
- At a garage
- €190–420£160–360 in the UK
Passenger seat occupancy mat replacement
- Do it yourself
- Garage job
- At a garage
- €250–550£220–480 in the UK
Front or side crash impact sensor replacement
- Do it yourself
- Garage job
- At a garage
- €140–310£120–270 in the UK
When to go to a garage
- Go to a garage as soon as you can because your safety restraints will not deploy during a collision.
- Book an inspection immediately if the car has recently been in an impact or flooded with water.
- Get professional diagnostic help if the horn or steering controls fail at the same time as the light appears.
Questions drivers ask
Will my airbags still go off in an accident while the light is lit?
Almost certainly not. When the airbag control unit detects an open circuit or faulty sensor, it shuts down that circuit or the entire restraint network as a built-in safety safeguard. This prevents dangerous, accidental deployment while you drive, but leaves you unprotected in a collision.
Will an airbag warning light fail the NCT or MOT?
Yes, an illuminated airbag warning light is an automatic major failure in both the Irish NCT and the UK MOT. The tester also checks that the warning light illuminates briefly during initial ignition check and turns off once the engine starts.
Why does my airbag light come on and go off on its own?
This intermittent issue is almost always caused by a loose electrical plug beneath the driver or passenger seat. When the seat slides on its runners or a passenger shifts weight, the pins temporarily lose contact, tripping the system light before reconnecting.
Can I simply disconnect the car battery to reset the light?
No, disconnecting the battery will not clear an airbag warning code on modern vehicles. Airbag fault codes are stored in permanent memory within the supplemental restraint computer and can only be cleared using a dedicated diagnostic scan tool once the fault is fixed.
Test rules here are for the National Car Test in Ireland (NCT) and the MOT in the UK. Elsewhere, check the regulations of your own country or state before going for a vehicle test.
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General guidance for most cars, not a diagnosis of yours. Details differ by make, model and year - check your handbook, and if in doubt, don't drive.