OWNER ANSWER
Why won’t the rear doors open on my original BYD ATTO 3?
Unlock the car with the smart key and try the rear door from outside. If it opens from outside but not from inside, check the child protection lock on the edge of that rear door. If neither handle works after unlocking, ask BYD to check the latch and central locking.
These checks follow the original ATTO 3 right-hand-drive handbook EN-240801. Check the matching handbook if the door controls differ.
- Park and unlock the car with the smart key. Check whether the other doors open from outside, then try the affected rear door from outside.
- If the rear door opens from outside only, look for the child protection lock on the edge of that open door. Match the slider to the handbook diagram. Position 2 in the diagram deactivates the lock. Each rear door has its own slider.
- If you want that door to open from inside, check it with an adult while parked and the car unlocked. Keep someone outside with the key. Restore the child lock before carrying children in the rear.
What success looks like
With the car unlocked, the outside handle opens the door. The inside handle opens it with the child lock off and stays disabled with the child lock on.
If that did not work
If the door stays shut from both sides after unlocking, leave the door trim and emergency locking slider alone. Tell BYD which door is affected, which handles work and whether the other doors unlock. Ask them to check the affected latch and central locking.
Safety note: If a rear door does not latch securely, keep the car parked and arrange assistance.
Useful next steps
BYD original ATTO 3 RHD EN-240801, printed pp. 49, 54 and 56–57. Checked 13 November 2026.
Open source (BYD UK)