What does the passenger airbag off light mean?

It means the front passenger airbag will not deploy. On most cars that is because the deactivation switch — normally in the glovebox or on the end of the dashboard, turned with the ignition key — has been set to off so a rearward-facing child seat can be carried. On cars without a switch, the seat's occupancy mat disarms the airbag when it detects little or no weight, so the lamp is simply telling you the seat is empty.

Does the passenger airbag off light fail an MOT?

No, and the inspection manual says so directly: a passenger airbag that is switched off is not a defect, and a lamp illuminated to show the passenger airbag is disabled is not to be treated as an SRS malfunction lamp. Testers are specifically warned not to confuse the two. The airbag malfunction lamp is the one that fails, as a major defect.

Why is my passenger airbag off light on with someone sitting there?

Either the deactivation switch has been left off, or the seat's occupancy mat is not reading the passenger. Check the switch first. If it is set to on and the lamp is still lit with an adult in the seat, the mat has probably failed — a well-known weak point, as the sensor sits in the seat cushion and flexes every time somebody gets in. The airbag will not arm until it is fixed, and the fault often lights the main airbag warning lamp as well.

Can I fit a child seat in the front passenger seat?

A rearward-facing child seat must never go in a front seat with an active airbag — a deploying airbag hits the back of the seat with enough force to be fatal. If the car has a deactivation switch, turn the airbag off and check the lamp confirms it before setting off. A forward-facing seat can be used in the front with the airbag active, but the passenger seat should be slid as far back as it will go, and the back seat remains the safer place for any child seat.

Dashboard warning light

Passenger airbag off light

Last updated 27 July 2026

Quick answer

The front passenger airbag has been switched off, either by the key-operated switch in the glovebox or door jamb, or automatically because the car has decided the seat is empty or lightly loaded. This is a status lamp, not a fault.

What to do: No action needed
Can you drive?: Yes

Why it is amber

A system has reported a malfunction, or something needs attention. The car is usually still driveable, but the fault will not clear itself and several amber lamps are an automatic MOT failure.

What turns it on

A manual deactivation switch, usually turned with the ignition key and provided so a rearward-facing child seat can be used in the front. On cars without one, an occupancy mat in the passenger seat cushion measures weight and disarms the airbag below a threshold — which is why the lamp comes on when the seat is empty.

What to do about it

Check the switch position if the lamp is on and an adult is sitting there. It is usually in the glovebox or on the end of the dashboard behind the door, and it takes the ignition key rather than a finger.
Leave it off if you are carrying a rearward-facing child seat in the front. A deploying airbag striking the back of a rearward-facing seat can be fatal to a child, which is the entire reason the switch exists.
Turn it back on as soon as the child seat comes out. It is easy to forget, and an adult in a passenger seat with a disarmed airbag has no idea until it matters.
If the lamp stays on with an adult in the seat and the switch set to on, the occupancy mat has probably failed and the airbag will not arm. That needs fixing.
Do not confuse it with the airbag malfunction lamp. This one says a specific airbag is off on purpose; that one says the whole system has a fault.

Can you keep driving?

Yes

Nothing is wrong with the car and nothing needs doing, provided the state of the lamp matches what you intend. The only real risk is a mismatch: an adult travelling in a front seat whose airbag has been switched off and left off, or a rearward-facing child seat in a seat whose airbag is still armed. Check which of the two you have before a long journey with a passenger.

What causes it

The manual deactivation switch turned off, usually for a child seat
An empty or lightly loaded passenger seat, on cars that disarm automatically
A child or a light adult below the occupancy threshold
A failed occupancy mat in the passenger seat cushion, which disarms the airbag permanently
A seat cover or a heavy object interfering with the occupancy sensor's reading

Does it fail an MOT?

No.

This lamp is specifically excluded from the MOT. The inspection manual states that a passenger airbag which is switched off is not a defect, and that a lamp illuminated to show the passenger airbag is disabled is not to be regarded as an SRS malfunction lamp. A tester who saw only this lamp would pass the car. What is tested is the restraint system's malfunction lamp, which is a separate symbol and a major defect, and the airbags themselves, which fail if one fitted as original equipment is obviously missing or inoperative.

Common questions

What does the passenger airbag off light mean?: It means the front passenger airbag will not deploy. On most cars that is because the deactivation switch — normally in the glovebox or on the end of the dashboard, turned with the ignition key — has been set to off so a rearward-facing child seat can be carried. On cars without a switch, the seat's occupancy mat disarms the airbag when it detects little or no weight, so the lamp is simply telling you the seat is empty.
Does the passenger airbag off light fail an MOT?: No, and the inspection manual says so directly: a passenger airbag that is switched off is not a defect, and a lamp illuminated to show the passenger airbag is disabled is not to be treated as an SRS malfunction lamp. Testers are specifically warned not to confuse the two. The airbag malfunction lamp is the one that fails, as a major defect.
Why is my passenger airbag off light on with someone sitting there?: Either the deactivation switch has been left off, or the seat's occupancy mat is not reading the passenger. Check the switch first. If it is set to on and the lamp is still lit with an adult in the seat, the mat has probably failed — a well-known weak point, as the sensor sits in the seat cushion and flexes every time somebody gets in. The airbag will not arm until it is fixed, and the fault often lights the main airbag warning lamp as well.
Can I fit a child seat in the front passenger seat?: A rearward-facing child seat must never go in a front seat with an active airbag — a deploying airbag hits the back of the seat with enough force to be fatal. If the car has a deactivation switch, turn the airbag off and check the lamp confirms it before setting off. A forward-facing seat can be used in the front with the airbag active, but the passenger seat should be slid as far back as it will go, and the back seat remains the safer place for any child seat.

This is general guidance, not a diagnosis. Manufacturers draw the same system differently and reuse symbols for more than one function, so check the handbook for your own car before acting on anything here.

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