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OWNER ANSWER

Why does my BYD DOLPHIN show a seat-belt reminder with an ISOFIX child seat?

Park and check which seating position the display marks. If it points to the child seat, check how that exact restraint secures the child and attaches to the car. Some ISOFIX boosters still use the car’s belt to restrain the child, so follow the restraint’s instructions for its current mode.

Dolphin Seat-Belt Reminder: Check which seat the display marks. Concept illustration.

For the BYD DOLPHIN covered by the May 2025 right-hand-drive handbook EN-250515. Check the handbook supplied with your car if its display or seats differ.

  1. Read the full display message and identify the seat marked on the diagram. Check whether the front or rear belt indicator is lit. BYD describes a rear-only visual reminder in this edition, so a beep alone cannot identify the rear belt as its source.
  2. Check the child seat model and use mode against its manual and the BYD seating-position instructions. Check the required ISOFIX connections and any top tether, support leg, harness or vehicle belt specified for that setup.
  3. If the child seat is empty and can be removed according to its instructions, compare the display while parked with that seating position empty. Record whether the same position is still marked.

What success looks like

The restraint passes its own fitting checks and the display agrees with the actual seating and belt use. A DOLPHIN owner reported the reminder cleared after changing the seat position. The restraint model and software were unknown, so any adjustment must follow both manuals.

If that did not work

If the restraint’s fit is uncertain, ask the seat maker or a qualified fitter to confirm compatibility and installation. If the same position is still marked when empty, or the reminder returns with a correctly fitted restraint, tell BYD which position is marked, what was on the seat and when the reminder appeared. Ask them to check the seat-belt reminder and buckle inputs.

Safety note: Leave the affected seat unused if the restraint fit is uncertain or the reminder appears faulty. Never add a buckle clip or reroute a belt to silence the reminder.

Useful next steps

BYD DOLPHIN RHD EN-250515, seat-belt reminders, printed p. 14. Checked 13 November 2026.

Open source

BYD DOLPHIN RHD EN-250515, child restraints, printed pp. 21–23.

Open source

GOV.UK child car-seat fitting rules.

Open source
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