BYD Atto 3, Dolphin, Seal, Seal U, Seal U DM-i, Atto 2 and Han — OTA, May 2025 · BYD Lab

BYD Austria published this bulletin on 1 May 2025. The release carries multimedia version 13.1.33.2503250.1. Everything below is translated from the German PDF; we have not installed this release on a car.

Overview#

New

[all models] New applications added to the BYD Store
[all models] Three additional BYD Assistant voice languages
[all models] Google search function added to the navigation
[all models] Karaoke scoring function added, compatible with the new grey BYD microphone
[all models] Adjustable warning-tone intensity with three levels (Medium as the default setting)
[DOLPHIN, SEAL, SEAL U, SEAL U DM-i] “Password to Drive” function added to deter theft
[SEAL] Automatic power on/off function added
[SEAL] Automatic activation of dipped beam and position lights at night added
[HAN] iTAC (Intelligence Torque Adaption Control) added

Optimised

[all models] User interface optimised for efficiency of use and appearance
[all models] BYD Assistant interaction improved
[all models] Accuracy of the system language translations improved
[ATTO 3, HAN] Android Auto and Apple CarPlay user experience improved
[ATTO 3] ADAS functions optimised
[ATTO 3] Instrument cluster brightness adjustment for light/dark mode optimised
[ATTO 3] One-touch front defrosting optimised
[ATTO 3, DOLPHIN, SEAL U, SEAL U DM-i, ATTO 2] Heating performance in winter improved
[ATTO 3, DOLPHIN, SEAL U, SEAL U DM-i] Windscreen anti-fogging function while parked improved
[ATTO 3, DOLPHIN, SEAL, SEAL U, SEAL U DM-i] Radar warning distance after shifting from “P” to “D” optimised
[DOLPHIN, SEAL, SEAL U, SEAL U DM-i] TSR (Traffic Sign Recognition) accuracy improved in some scenarios (motorways, cities, conditional speed limits)
[DOLPHIN, SEAL, SEAL U, SEAL U DM-i] FCTB activation logic in roundabout scenarios optimised
[SEAL] DC charging performance in low ambient temperatures improved
[SEAL U] Scheduled charging function optimised
[SEAL U] CPD (Child Presence Detection) performance optimised
[SEAL U, SEAL U DM-i] Descriptions of HUD (Head-Up Display), the LDA (Lane Departure Assist) system and the Password to Drive function adjusted in the owner’s manual
[ATTO 2] Warning logic of the DMS function optimised

New features#

New apps in the BYD Store#

Four new apps: YouTube, BYD for Zoom, BYD Arcade and Calm Radio.

Note: for safety reasons, engage “P” to use YouTube, Zoom and Arcade.

BYD Store home screen on the head unit: a search field reading Please enter the App name, a Stingray Karaoke promo banner and app tiles for Stingray Karaoke, Browser, Amazon Music, Manual, BYD Arcade, BYD for Zoom, YouTube and Calm Radio, each with its download size and an Open button. — The four new titles sit in the same BYD Store list as the existing apps, each with its install size.

New apps in the BYD Store: YouTube#

The official YouTube app is available: music videos, games, fashion, beauty, news, learning and more.

Streaming video can cause heavy data use; BYD recommends connecting to a Wi-Fi network.

YouTube running full screen on the head unit, showing the home feed with category chips (All, Accents, Music, Gaming, Podcasts) and video thumbnails, with the climate and shortcut bar along the bottom of the display. — YouTube runs as a full head-unit app with the usual home feed and category filters.

BYD Store detail page for YouTube with an Open button at top right and four preview screenshots of the app, including a BYD Global channel page. — The app is installed from its BYD Store listing page.

New apps in the BYD Store: BYD for Zoom#

Work from anywhere with a single app: team chat, phone, whiteboard, meetings and more. BYD for Zoom provides tools for remote communication and collaboration and supports high-resolution video meetings.

Precautions: 1. A stable network signal is required while the app is in use. 2. The camera function only works in vehicles fitted with in-car cameras. 3. Free meetings are limited to a maximum of 40 minutes in the basic version (this is Zoom’s official restriction, not a BYD product restriction). 4. Only starred contacts appear in the contact list (again Zoom’s official restriction, not BYD’s). 5. Long meetings can cause excessive data use; a Wi-Fi connection is recommended in that case.

Photograph of the head-unit screen showing a dialogue reading BYD for Zoom needs to be used with Wi-Fi connection, with the options Connect Wi-Fi and Exit. — The app asks for a Wi-Fi connection before a meeting starts.

BYD for Zoom home screen on the head unit showing the clock (19:13, Thursday, Sep 26), buttons for New meeting, Join and Contacts, and a scheduled meeting card with a Start button. — The in-car Zoom home screen offers new, join and contacts entries plus the next scheduled meeting.

New apps in the BYD Store: BYD Arcade#

BYD Arcade is a collection of mini-games from various platforms. Each game can be played offline with a single tap, to pass the time while waiting in the car or during short charging stops. The game content is updated regularly.

The titles are: 1. 2048 (controller can be added), 2. Tiny Yurts, 3. Packa bunchas, 4. Black Hole Puzzle, 5. Crazy Rabbit (controller can be added), 6. Stolen Sword.

BYD Arcade on the head unit with 2048 selected: a description panel, a row of game cards (2048, Tiny Yurts, Packa Bunchas, Black Hole Puzzle, Crazy Rabbit, Stolen Sword), a Start Games button and a Controller button. — The Arcade launcher lists the six included games; two of them accept a controller.

Crazy Rabbit page in BYD Arcade with a Controller management dialogue open, showing My controller, the message Controller not added and an Add controller button. — Games that support a gamepad open a controller-pairing dialogue.

New apps in the BYD Store: Calm Radio#

Calm Radio’s relaxing music channels, with classical works, nature sounds, easy-listening favourites and calming music, provide a more pleasant and calming atmosphere while driving.

Precaution: audio playback and background downloading consume mobile data; a Wi-Fi connection is recommended.

Calm Radio on the head unit with genre tabs (My Favorites, Easy Listening, Classical, Pop Rock, Wellness) and channel rows for Acoustic and Lounge, each channel shown as cover art. — Channels are grouped by genre and mood.

Calm Radio now-playing screen with the track Gravity - Instrumental Version by Lance Allen and Avery Bright over a winter scene, and a Change music background panel offering alternative backdrops. — The player lets the user swap the ambient background image behind the track.

Support for three more BYD Assistant languages#

The BYD Assistant’s interaction has been optimised: Zoom can be opened and closed by voice in all languages; Spotify playback and opening/closing playlists is supported in all languages; after the wake word the assistant now replies with a phrase such as “I’m here”, “Yes?” or “What’s up?”, in a friendlier and more natural tone; the current date can be queried in all languages (limited to today’s date).

Three languages have been added to the BYD Assistant: Dutch, Danish and Swedish. Connect to the Wi-Fi or 4G network and then download the language pack. Denmark: Danish; Netherlands and Belgium: Dutch; Sweden and Finland: Swedish.

Voice Settings on the head unit: Audio Wakeup switched on with the hint You may say ‘Hey BYD’/‘Hi BYD’ to activate the voice assistant, tiles for Wake word, Audio Zone Settings and Wakeup-free, a Continuous Dialogue toggle, Voice Broadcast Volume set to 15 and Voice Languages set to English (America). — Wake word, continuous dialogue and the assistant language are all set from Voice Settings.

Voice Languages list on the head unit showing German (with an Update button and a delete icon), Swedish, Cantonese, Portuguese (Brazil), Danish, Dutch and Italian, each with a pack version, size and a Download button. — Each assistant language is a downloadable pack, so Danish, Dutch and Swedish arrive over the network.

Google search is available in the navigation. Google results are shown when there is an internet connection, and the detail page also shows information from Google such as ratings, photos and reviews.

Navigation voice support now follows the system language when switching between Swedish and Danish. The languages currently supported are English, Norwegian, French, German, Spanish, Italian, Portuguese and Dutch.

Prerequisite: the TTS resource package has to be installed at the workshop if the customer wants it (the TTS package and the operating instruction must be uploaded to the TIS system as an SN).

The search field in the navigation now queries Google directly.

Karaoke function (compatible with the new grey microphone)#

A karaoke scoring function has been added, with a large choice of songs including various kinds of popular music.

Real-time incentive function: during karaoke the system scores the singing performance live and gives encouraging feedback.

Karaoke app on the head unit showing the song page for Shake It Off in the style of Taylor Swift, with duration 3:37, year 2014, a five-star rating and the buttons Score Song, Sing Now and Add to Queue. — Each song can be started in scoring mode or sung without a score.

Karaoke performance view with scrolling lyrics over an illustrated backdrop, a running score of 36,743, four stars and a PERFECT rating for the current line. — Scoring runs line by line while the song plays.

Adjustable warning-tone intensity with three levels#

The setting covers the tones for the steering wheel, hazard warning, power on/off, gear shifting, instrument cluster notifications, radar warnings, seat belts, ADAS driving assistance, active safety and the DMS (Driver Monitoring System).

Default setting: medium level.

Head-unit settings, Audio Display section, Notifications tab: a Safety Alert Broadcast toggle, a Broadcast Content entry, a Vehicle Prompt Volume selector set to Mid between Low and High, and an AVAS Sound Source Play button. — Vehicle Prompt Volume is the new three-level control, set to Mid by default.

Explanatory dialogue Vehicle Prompt Volume stating that it adjusts the volume of steering, hazard warning, seat belt fastening, driving assistance and active safety, with the levels described as Low: soft and gentle, Medium: moderate and comfortable, High: clear and loud. — The info dialogue lists which warnings the three levels affect.

[DOLPHIN, SEAL, SEAL U, SEAL U DM-i] “Password to Drive” function#

Important notes: before opening the driving password settings, make sure the vehicle is in P.

The driving password function only applies when the smart key is used to open the vehicle, or in combination with the micro-switch mechanism in the door handle. Opening the vehicle through the mobile app is not restricted.

Head-unit settings, Locks tab, showing a Password to Drive toggle switched off, a Remote Unlock selector set to All Doors rather than Driver’s Door, and Auto Lock while Driving switched on, next to a rendering of a SEAL. — Password to Drive is switched on in the Locks settings, with the car in P.

Set the password dialogue on the head unit with four empty digit dots and an on-screen numeric keypad. — The driving password is a four-digit code entered on the head unit.

Optimisations#

Customisable bottom dock bar#

The dock bar can be customised by picking functions from two categories: vehicle controls (for example air conditioning, seat adjustment, defrosting, steering-wheel heating and lighting) and apps (Music, Settings, Navigation, Media Center), so frequently used functions can be arranged freely.

Dock bar edit mode on the head unit, Control tab: a grid of vehicle functions (Back, Split Screen, Steering Wheel Heating, Air Mode, A/C On/Off, Recent Tasks, Screen Rotation, Front Defrosting, Ventilate, Screen OFF, Circulation, Seats, Seat Adjustment) with plus badges, the hint Drag or tap the icon to add/delete, and the dock below showing minus badges. — Vehicle controls are added to or removed from the dock by tapping the badged icons.

The same dock bar edit mode on the Apps tab, offering Settings, Navigation, Phone and Media Center, with the dock at the bottom in edit state. — A second tab holds the apps that can occupy a dock slot.

Settings layout#

The menu categorisation has been optimised: the primary menu grows from 5 to 8 entries, the number of secondary menu items is reduced to a maximum of 6, and a search function has been added to make the settings easier to use.

Energy Manager settings before the update: a five-entry side menu (System, ADAS, Energy, Vehicle, Service) with the tabs Energy Manager, Charging Settings, Discharging Settings, Consumption and Consumption Curve, plus Regenerative Braking, SOC Settings and Energy Display Mode controls. — Before: five primary entries and five sub-tabs, with no search.

Energy Manager settings after the update: a search field above an eight-entry side menu (Light, Locks, Audio Display, Energy, Vehicle, Service, ADAS, System) and three tabs — Energy Manager, Charge/Discharge, Energy Consumption — with SOC Settings, Regenerative Braking and SAVE Mode Memory. — After: eight primary entries, fewer sub-tabs and a search field at the top.

Customisable quick-access bar#

The quick-access centre has been optimised with a simpler layout and a refreshed interface design. It brings the most important control functions to the front and can be edited to match individual customer preferences.

Before-and-after comparison of the quick-access panel: on the left the old dense grid of small icons with volume and brightness sliders, on the right the redesigned panel with larger tiles for volume, brightness, Wi-Fi, Bluetooth, battery level, dark mode, mute, HUD, ventilation and seat comfort plus a customise button; underneath, a row of media-widget variants in different themes. — The redesigned panel replaces the icon grid with larger, editable tiles.

ADAS optimisations (TSR, ACC, FCTB)#

TSR recognition in specific scenarios: speed limits below 60 km/h on motorways have been removed, speed limits above 100 km/h in cities have been removed, and conditional speed limits for the night-time period have been optimised.

ACC false braking: fewer false brake applications in stationary-target scenarios, for example vehicles parked at the roadside.

ACC speed stability improved: fixes the fault where the speed shown in the instrument cluster suddenly jumped by ±1 while the ACC value was being set.

FCTB (Front Cross Traffic Braking) sensitivity adjustment: excessive sensitivity in roundabout scenarios is reduced for smoother behaviour. Traffic signal: cross-traffic braking is reduced to lower the trigger frequency. Pulling away: braking by the driver can stop the intervention.

Front radar warning distance and cluster brightness#

The front radar warning distance when shifting from “P” to “D” has been increased: the front millimetre-wave radar from 40 cm to 70 cm, and the corner radar from 40 cm to 60 cm.

The instrument cluster’s brightness adjustment for light/dark mode has been optimised.

Maintenance display and heating performance#

The maintenance display has been adapted to the new maintenance policy (km + miles).

Heating performance has been optimised: all heating target temperatures have been raised to take cooler regions into account (Europe).

Photograph of the head-unit screen in Service, Intelligent Maintenance tab, with a Maintenance Mileage picker dialogue set to 20100 mile(s) between 19800 and 20400, and OK and Cancel buttons. — The maintenance interval can now be shown and set in miles as well as kilometres.

Head-unit climate screen with A/C, Vent Heating, Air Purification and Settings tabs at the left, mode buttons (ON, AUTO, MAX, DUAL, front defrost, rear defrost, recirculation, ONLY) along the top, and driver and front-passenger temperatures both set to 24 °C with airflow drawn over a seat graphic. — Heating target temperatures were raised across the climate control.

[SEAL, SEAL U, SEAL U DM-i] Automatic power on/off, translation accuracy and Bluetooth call echo fix#

Automatic power on/off has been added (for SEAL). With the automatic power on/off function active, the start button no longer has to be pressed when getting in or out: after getting in, press the brake pedal, select a gear and drive off; when leaving, lock the vehicle to switch it off.

The accuracy of the system translations has been comprehensively optimised for the 15 main EU languages: English, Portuguese, German, Spanish, French, Hebrew, Italian, Norwegian, Danish, Dutch, Hungarian, Swedish, Greek, Polish and Turkish.

The echo problem on Bluetooth calls made through the vehicle’s hands-free system has been fixed (SEAL U EV / SEAL U DM-i).

Head-unit vehicle settings, Comfort Driving tab, with a Power Supply group showing Auto Power On switched on and Auto Power Off switched off, plus Side Mirror Auto-fold and Auto Wiper toggles, next to a rendering of a SEAL. — Auto Power On and Auto Power Off are separate switches in the Comfort Driving settings.

BYD App: mileage display for right-hand-drive markets and charging schedule#

A miles/odometer display has been added to the BYD App for right-hand-drive markets (range and total odometer reading).

The charging schedule function in the BYD App adds compatible models — ATTO 3, Dolphin, SEAL and HAN — and requires app version V2.6.0 or later.

Also in this release#

OTA upgrade notice: checking the vehicle version#

Check the vehicle version under Settings – Vehicle – Version – Update.

Target multimedia version for ATTO 3 / HAN / Dolphin / SEAL / SEAL U EV / SEAL U DM-i / ATTO 2: 13.1.33.2503250.1.

Head-unit settings, System section, Version tab, with a Version update row and an Upgrade link, and a Tips dialogue reading Checking the software version info. Please wait with an OK button. — The Version tab checks with the server before the upgrade is offered.

Key instructions for the OTA upgrade#

Precautions: 1. The moment at which the vehicle receives the push notification can vary, so please be patient; the actual duration of the upgrade is shown in the vehicle’s system messages. 2. Start the update outside driving time — the vehicle cannot be driven while the update runs.

Before updating: park the vehicle on a level, safe surface in P; make sure the network signal is strong; keep the battery level above 20% (upgrades cannot be run below 20%); close all doors, the bonnet and the boot.

Caution: do NOT attempt the OTA upgrade if the vehicle is in one of the following situations, otherwise the update can fail and impair the intended operation of the vehicle — connected to external OBD devices (for example taximeters); charging or discharging the battery; in transport mode.

If an error message appears, visit an authorised workshop for a manual upgrade using an offline VDS or the USB flash update procedure.

USB upgrade of the multimedia system (ATTO 3 / Dolphin / Seal / Seal U EV / Seal U DM-i)#

Requires multimedia version 13.1.33.2407240.1 or later, and applies to ATTO 3 / HAN / Dolphin / Seal / Seal U EV / Seal U DM-i / ATTO 2.

Connect the USB drive to the vehicle; a prompt appears asking you to scan with VDS to obtain authorisation. 2. Connect VDS to Wi-Fi and scan the QR code on the pad screen with the camera. 3. Authorisation successful.

The workshop instruction reproduced on the slide adds: download the target multimedia update file from the related OTA SN on TIS (the file must not be passed to any external party); prepare a USB stick larger than 8 GB and smaller than 64 GB and format it to FAT32; create the folder structure BYDUpdatePackage / msm8953_64 holding updateFull.zip; power on the vehicle; insert the USB disk into the USB port under the front auxiliary panel; the pad then shows a QR code that an internet-connected VDS scans to authorise the upgrade. The procedure excludes the TANG EV 23.

OTA troubleshooting and SN documents#

Process improvement: this time the SN documents are uploaded before the batch is released.

There is an SN OTA document for each model, plus SN-01-2024-058 “BYD Vehicle OTA Instructions”, which contains the solutions for OTA malfunctions.

What we have not verified#

This is a translation of BYD Austria’s bulletin, not a test: we have not installed V1.8.2 (ATTO 3) / V1.5.1 (DOLPHIN) / V1.4.0 (SEAL) / V1.3.0 (SEAL U) / V1.3.0 (SEAL U DM-i) / V1.1.0 (ATTO 2) / V1.5.1 (HAN) on a Atto 3, Dolphin, Seal, Seal U, Seal U DM-i, Atto 2 and Han.
The bulletin was published by BYD’s Austrian importer. The release itself is the European one, but roll-out dates are given for Austria, and a few items are country-specific (radio services, interface languages, legal notes).
Availability of individual features can depend on trim, model year and the head-unit hardware.