The Safety of the Toyota Sienta are as follow:
| Variants | 2018 Toyota Sienta 1.5G | 2018 Toyota Sienta 1.5V |
| Euro NCAP Rating | 0 | 0 |
| ASEAN NCAP Rating | 10 | 10 |
| Airbags | 3 | 3 |
| Driver/Front Passenger Seat Airbags | Y/Y | Y/Y |
| Front/Rear Side Airbags | - | - |
| Front/Rear Curtain Airbags | - | - |
| Knee Airbags | Driver Knee | Driver Knee |
| Rear Airbags | ||
| Airbag Disable Function | ||
| Seatbelt Reminder | Front Seats Only | Front Seats Only |
| Autonomous Emergency Braking | - | - |
| Lane-keeping Alert | N | N |
| Blind Spot Info System | - | - |
| Collision Warning | - | - |
| ABS/EBD | Y | Y |
| Electronic Stability Control(ESC) | Y | Y |
| Child Safety Lock | Manual for rear doors | Manual for rear doors |
| ISOFIX | Y | Y |
| Security Alarm | Y | Y |
| Immobilizer | Y | Y |
