SOFTWARE UPDATE

BYD SEAL 2023–2025 software update 2.3.0: full guide

Original SEAL 2.3.0 adds a front-car reminder, remembered assistance-alert sounds, selectable cruise increments and personalised assistance presets. CPD can remember an OFF setting, while ICC, navigation and seat-memory saving are also refined.

1. Front-car start reminder

When ACC is not active and the car ahead moves off, a stationary SEAL can give a text prompt and sound after a period without moving. A new switch lets you choose whether this reminder is enabled. The illustrated ADAS Driving Assist screen calls it Front Car Start Remind.

2. Driving-assistance alert sounds

Go to Settings → ADAS → Driving Assistance → Driving Assistance Alert Sound. The switch remembers your previous setting. When enabled, it gives an audible notification if an assistance function is degraded or exits because of environmental conditions or system limitations. The illustrated interface uses the label ADAS Reminder Voice.

3. Cruise-speed adjustment steps

Open Settings → ADAS → Driving Assistance and choose the cruise-speed adjustment mode. On a UK original SEAL, the choices are long press ±1 mph / short press ±5 mph, or long press ±5 mph / short press ±1 mph. The steering-wheel resume +/− control follows your choice. These mph increments are UK owner-confirmed.

4. Personalised assistance presets

Four choices are provided: All On, All Off, Default and Custom. In Settings → ADAS → Active Safety Assist → Personalization Settings, configure and save the combination you want. The system remembers that combination, reducing the need to change several switches individually at each start.

4. Restoring your saved preset

Pull down the centre-screen convenience bar, tap Personalization Settings and confirm Turn On to restore your saved combination. The detailed settings page also provides a restore route. This operation requires Park (P); outside Park a message asks you to select P first. In a special vehicle mode the control may be greyed out.

5. Child Presence Detection memory

If you turn CPD off, that choice is retained for the next vehicle start. After locking the car, the initial alert delay when a living being is detected inside changes from 10 seconds to 90 seconds. At startup, a white cluster notification briefly reminds you if CPD is disabled. The indicator briefly flashes and then goes out after power-on.

6. Corner-speed reduction

The corner-speed-reduction text prompt is revised to appear only when you are not following another vehicle. The amount of speed reduction is reduced under the conditions addressed by this optimisation. The notes do not publish a new numerical cornering-speed limit.

7. ICC on wide and narrow lanes

Intelligent Cruise Control is refined to reduce unnecessary deactivation on wide ramps, at intersections and on narrow road sections. The change aims to reduce interruptions in those situations.

8. ICC and driver steering input

When the driver steers within the defined lateral range, the ICC lane-departure warning is suppressed. The published notes describe an expanded co-driving zone: within 0.5 metres of lane departure, ICC can stay engaged and allow driver/system co-driving without triggering that warning.

9. Navigation

The T-Way Map navigation experience is optimised. This navigation feature is available only in certain countries; the notes do not list the countries or promise availability in every car.

10. Seat-position memory

Seat-memory settings can now be saved when the vehicle is not in Park. This is a saving-function change, not advice to adjust your driving position while moving. Set up your position while safely stopped.

11. Display and text

System-interface presentation and on-screen prompts are refined. The release does not enumerate every wording or visual change. The source screenshots are illustrative, so your actual interface may look different.

Seat recall and easy access are different

A UK owner reported missing exit movement after an update. Keep that observation separate from lost seat memory: recalling a saved position and the automatic entry/exit movement are different functions.

The original March 2025 RHD handbook describes automatic backward movement and return under specified door/power conditions. A horizontal adjustment after that backward movement can change the return behaviour. Check Vehicle → Comfort Driving for the automatic-driver-seat setting in that edition; later screen labels can differ.

Check recall without replacing the saved position

While parked, select P and tap the intended memory slot in Seats → Seat adjustment. A tap recalls the position; holding the button saves the current seat and mirror positions over that slot. The older handbook illustrates two slots; an updated screen may differ.

Compare ordinary seat adjustment, recall and automatic entry/exit movement. If manual movement works but one automatic function fails, ask the dealer to reproduce that particular sequence. Give the full software version, selected slot, door/power state and any adjustment made after the seat moved backwards. If ordinary movement fails too, explain whether one direction or every direction is affected.

Install when your car offers it

Matching released EU updates apply to the matching UK car, as confirmed by UK owners. Offers are staged by VIN, so another owner receiving it first does not mean yours has a fault.

During installation

BYD says the car can be locked and left normally. Use the duration shown on screen; the release does not give a fixed installation time.

Park on a safe, flat surface and select P for the duration shown by the car.
Read the car’s notice and match the model, edition, trim and complete package.
Ensure a strong network signal and battery charge above 20%; close the doors, bonnet and boot. Below 20%, the upgrade cannot proceed.
Stop battery charging or discharging; disconnect external OBD equipment and leave Transport Mode before starting.
Start the update through the car’s screen. Safety note: the car cannot be operated during installation; leave it to finish even if the screen briefly goes black, headlights illuminate or dashboard warnings appear. Interrupting it or using unofficial firmware can leave the software unusable. Keep children and animals with you rather than relying on CPD, and keep the seat’s travel clear when checking recall; assistance systems still need the driver’s attention and control.
Wait for the completed-update message.
Review assistance presets, cruise increments and CPD settings while parked. Check your usual seat-memory recall separately from easy-access movement. The normal controls should be available again after completion.

If the update fails

If installation reports a failure or a warning remains after completion, follow the displayed message and contact a BYD dealer or BYD Customer Service. Give them the full installed version and exact error, and ask them to check the failed package and the required recovery. The release names workshop-managed offline VDS or USB recovery; the service centre handles that process. If the update simply has not appeared, wait for the vehicle notification unless a function is missing or the car reports a fault.