OWNER ANSWER
Original ATTO 3: does it lock when you walk away?
Lock the original ATTO 3 with the key button or the button on the front door handle before leaving it. The cited handbook describes automatic relocking after an unlock with no door opened; that is different from locking after you get out and walk away.
Original ATTO 3 RHD EN-240801; not ATTO 3 EVO. Controls and equipment must match your car.
- Switch the ignition off, take the key with you and close the doors, bonnet and boot.
- Press the lock button on the key, or press the front-door handle button while carrying the smart key.
- Look for the locking confirmation. The handle-button procedure in this handbook flashes the indicators once when the car locks normally.
- If you had only unlocked the car and did not open a door, it can relock after 30 seconds. Do not use that timer as confirmation after a journey, when a door has been opened.
What success looks like
You receive the normal locking confirmation after your deliberate lock command. The 30-second relock applies to an unopened car after unlocking; it does not establish a walk-away function.
If that did not work
If the handle button does not produce the expected confirmation, check every door, the bonnet and the boot, then compare the key lock button. The handbook says an unclosed opening can produce a horn sound without the normal indicator flash. If the fob works but the handle does not, ask BYD to check the handle switch and key detection. If your software offers a named walk-away setting, use its matching instructions; this original-ATTO 3 handbook does not provide an activation procedure for it.
Useful next steps
BYD Original ATTO 3 RHD EN-240801; not ATTO 3 EVO handbook, PDF pages 51, 52. Checked 13 November 2026.
Open source (BYD UK)