OWNER ANSWER
Why won’t my original BYD ATTO 3 tailgate close and lock the car?
Switch the ATTO 3 off and keep a valid smart key with you outside. With the boot open, press the vehicle lock button on the tailgate itself. The adjacent boot-close button closes the lid and gives you a way to check whether the powered lid still works.
- With the car switched off, make sure the doors, windows and any sunroof are closed. Keep the smart key with you and clear people and luggage from the path of the boot lid.
- With the lid open and stationary, press the tailgate’s vehicle lock button. BYD labels it button ②. Watch for the lid to close fully, then confirm the vehicle is locked.
- If the lid does not move, try button ①, the ordinary boot-close button, once. If it closes normally, lock the car with the smart key and check that it has locked.
What success looks like
The vehicle lock button closes the lid and locks the car. If the ordinary close button works on its own, you can close the boot and lock separately while the combined command is checked.
If that did not work
If only the combined button fails with the key outside and the car off, tell BYD whether the ordinary close button and fob locking both work. Ask them to check the tailgate lock switch and smart-key detection. If the lid reverses or stops, check for an obstruction and stop testing if it binds or fails to latch. Arrange assistance before driving with an unsecured lid.
Useful next steps
- Read the original ATTO 3 close-and-lock procedure (BYD UK)
- Compare the ordinary boot-close control (BYD UK)
- Prepare an unresolved fault for BYD
BYD original ATTO 3 RHD EN-240801, printed pp. 52–53. Checked 13 November 2026.
Open source (BYD UK)