UI family
UI_a021_RearSeatbeltUnbuckled
Rear seat belt unbuckled
What does the UI_a021_RearSeatbeltUnbuckled alert mean?
At least one of the rear seat belt is unbuckled whilst an occupant is detected
What you'll see in your Tesla
- Rear seat belt unbuckled
- Not Available
What triggers it
At least one of the rear seat belt is unbuckled whilst an occupant is detected
When it clears
All seat belts buckled on seats where occupants are detected
Potential impact
Safety risk when driving
Affected models
Cybertruck
Model 3 2017-2023
Model 3 2024+
Model S 2021+
Model X 2021+
Model Y
Model Y 2025+
Track your Tesla's alerts automatically
Alerts like this reach MyTeslaMate through your car's Tesla telemetry API. MyTeslaMate logs every alert your Tesla reports and turns it into readable history and real-time notifications — hosted TeslaMate with no server to run.