OWNER ANSWER
DOLPHIN says key not detected or the NFC card will not work
If your DOLPHIN does not recognise its key, move the fob away from your phone and try the spare. If electronic unlocking fails, the handbook provides a mechanical driver-door key; use the matching handle and lock shown below.
- Separate the authorised key from phones, metal cases and other keys.
- Try its unlock button close to the driver’s door.
- Try the supplied spare if available.
- If electronic entry fails and your fob/handle match the handbook, use this entry method: Press PUSH to release the mechanical key. Lift the outer driver-door handle, insert the key and turn clockwise to unlock, then remove it and pull the handle. Safety note: Keep the key with you and nobody locked inside. Match the mechanical-key diagram before turning a lock; force can damage it. Keep loose coin batteries away from children.
- Once inside, keep the valid key in the cabin and use the normal brake-and-start sequence.
NFC and phone keys
For an equipped NFC card, use the driver-mirror mark less than 2 cm away for 1–2 seconds. Use the separate interior NFC mark to authorise a supported phone start. A working app does not activate an unsupported wallet key.
Weak fob indicator
A dim or unlit indicator can accompany a depleted key battery. The cited handbook recommends BYD inspection or battery-change help; if the spare works, ask for the first fob to be checked.
If that did not work
If the car opens but still shows a key warning, use its documented recognition procedure or ask BYD to check key recognition. If neither key works or lights/locks are also unavailable, use the model-specific unresponsive-car guide and assistance.
What to note down for support: The failed key method, spare result, warning and remaining lights/display response are enough to start the call.
Related links
Source: byd.com: owners manual · DOLPHIN handbook (PDF 45–50; printed 44–49). Checked 22 October 2026.