The red seatbelt symbol and chime remind occupants to belt up. The law, fines, passenger sensors and false alarms.
Looking for more detail? Our full guide covers this topic in depth, with step-by-step advice and sources.
Someone in a seat with a sensor is not wearing a seatbelt, or something heavy on the seat is being detected as a person.
What it looks like
A seated person wearing a seatbelt. Colour: Red.
Common causes
- Driver or passenger not belted
- Heavy bag on the front passenger seat
- Faulty seat or buckle sensor
What to do
- Make sure everyone is belted. Drivers can be fined up to £500 for not wearing a seatbelt.
- Drivers are responsible for passengers under 14 wearing a belt or the correct child seat.
- Move heavy bags off the seat, or into the footwell.
Can I keep driving?
Yes, once everyone is belted.
MOT
Seatbelts must work correctly to pass; the reminder itself is not a specific item for most cars.
Symbols vary slightly between makes. Always check your owner's handbook. General guidance only; if in doubt, call your breakdown provider.
Sources and further reading
Facts checked on 20 October 2026. Spotted an error? Tell us and we will correct it.