BYD Seal, Atto 2, Seal U and Seal U DM-i — OTA, October 2025 · BYD Lab

BYD Austria published this bulletin on 26 Oct 2025 for a roll-out in Q4 2025. Everything below is translated from the German PDF; we have not installed this release on a car.

Overview#

New

[SEAL, ATTO2, SEAL U EV, SEAL U DM-i (LHD), SEAL U DM-i (RHD)] Addition of the BYD Assistant in several languages.
[SEAL U EV, SEAL U DM-i (LHD), SEAL U DM-i (RHD)] Addition of the “inside overtaking prevention” function for ACC (Adaptive Cruise Control).
[ATTO2, SEAL U EV, SEAL U DM-i (LHD), SEAL U DM-i (RHD)] Addition of the “speed adjustment on curves” function for ACC.
[ATTO2, SEAL U EV, SEAL U DM-i (LHD), SEAL U DM-i (RHD)] Addition of the “adjustment of the cruise speed via the accelerator pedal” function for ACC.
[ATTO2, SEAL U EV, SEAL U DM-i (LHD), SEAL U DM-i (RHD)] Addition of the “emergency stop” function for ICC (Intelligent Cruise Control): if the driver keeps their hands off the steering wheel, the system switches on the hazard warning lights and decelerates to a standstill within the lane.
[ATTO2, SEAL U EV, SEAL U DM-i (LHD), SEAL U DM-i (RHD)] Addition of a “hands-off penalty strategy” for ICC: after three level-3 hands-off-the-wheel warnings, the ICC function is deactivated until the vehicle is restarted.
[ATTO2, SEAL U EV, SEAL U DM-i (LHD), SEAL U DM-i (RHD)] Addition of a driving cooperation function for ICC and LDA (Lane Departure Assist).
[SEAL, SEAL U EV] Addition of a battery preheating function.
[SEAL, SEAL U EV] Addition of an AC charging current limiting function.
[SEAL, SEAL U EV] Addition of a scheduled departure function for smart charging.
[SEAL] Extension of the voice control functions in the BYD Assistant: A/C ventilation, maximum cooling, seat ventilation and heating, switching YouTube on and off, and Spotify song requests.

Optimised

[ATTO2, SEAL U EV, SEAL U DM-i (LHD), SEAL U DM-i (RHD)] Optimisation of the Spotify song request via the BYD Assistant.
[ATTO2, SEAL U EV, SEAL U DM-i (LHD), SEAL U DM-i (RHD)] Optimisation of the system user interface with a next-generation design upgrade.
[SEAL] Optimisation of the system user interface.
[ATTO2, SEAL U EV, SEAL U DM-i (LHD), SEAL U DM-i (RHD)] Optimisation of the driving password function with a BYD app operating password.
[SEAL] Optimisation of the driving password function with the BYD App.
[SEAL, ATTO2, SEAL U EV, SEAL U DM-i (LHD), SEAL U DM-i (RHD)] Optimisation of the system translations in several languages.
[SEAL U EV, SEAL U DM-i (LHD)] Increase of the maximum ICC activation speed to 150 km/h.
[SEAL U DM-i (RHD)] Increase of the maximum ICC activation speed to 95 mph.
[SEAL U DM-i (LHD)] Optimisation of climate comfort (A/C).
[SEAL U DM-i (RHD)] Optimisation of the anti-theft alarm system.
[SEAL U DM-i (RHD)] Optimisation of the radar alarm range after switching from “P” to “D”.
[SEAL] Removal of the speed display from the PAD maps.
[SEAL] Optimisation of the instrument display brightness adjustment for light and dark mode.
[SEAL] Optimisation of the dynamic balancing capability of the SOC (state of charge).
[SEAL] Improvement of the charging speed at low temperatures.
[ATTO2, SEAL U EV, SEAL U DM-i (LHD), SEAL U DM-i (RHD)] Addition of descriptions of the new functions listed above to section 4-5 (driver assistance) of the owner’s manual.

New features#

BYD Assistant added in several languages#

Four more available languages are added: Hungarian, Finnish, Hebrew and Polish. Connect over Wi-Fi or 4G and then download the voice package; availability depends on the country code.

Several interactive functions of the BYD Assistant have been optimised:

Voice control: supports voice commands for the electric A/C ventilation and the Max Cool mode — switch on airflow.
Seat ventilation and heating: switches the passenger seat ventilation to level 2.
Voice commands for apps: start navigation / start YouTube.
Spotify integration: supports voice-activated song requests through Spotify, for example “I want to hear XXX”.

Head-unit Voice Language list showing Swedish, Finnish, Cantonese, Portuguese (Brazil), Mandarin, Hungarian and Danish with package versions and Download buttons; Finnish and Hungarian are highlighted, and a banner below reads ALSO SUPPORTS POLISH, HEBREW For Europe. — The voice packages are downloaded per language from the Voice Language list.

[SEAL, SEAL U EV] Battery preheating function added#

Battery preheating: vehicle switched on, low battery temperature (16 °C) before charging.

Purpose: to improve charging performance and shorten the charging time during low-temperature DC charging.

Setting path: Settings → Energy → Charging & Discharging → Battery preheating.

The head unit explains that in low-temperature environments the traction battery can be preheated to meet the temperature requirements for high-power DC charging.

Precautions printed with the function: (1) switch the function on before charging at low temperature, which reduces the DC charging time; (2) once the battery temperature reaches the appropriate range the function switches off automatically and has to be enabled again next time; (3) the function cannot be switched on while charging.

Head-unit Energy settings, Charging and Discharging tab, with a red-outlined Battery Preheating dialogue listing three points: turn the function on before charging at low temperature to reduce DC charging time; it switches off automatically once the battery temperature is in range and must be re-enabled next time; it is not turned on while charging. — The explanatory dialogue behind the new Battery Preheating switch.

[SEAL, SEAL U EV] Scheduled departure added to smart charging#

The usage time can be set in advance. The vehicle completes charging, battery heating and intelligent cabin temperature control before the scheduled time, so that the car is comfortable to drive away.

Scheduled Charging: set the start time and end time for charging and connect the charger, to charge at the specified time.

Scheduled Departure: set the departure time and connect the charger in advance. This function uses the charging point (or the traction battery) to preheat the battery intelligently at low temperatures.

Note on the source: the German text block on this slide does not match its own heading. It describes a repair mode instead: when a vehicle is brought to an authorised service workshop for maintenance, after-sales staff can activate repair mode on the secret-code page of the PAD. Purpose: to protect after-sales technicians from risks (for example being startled or injured) that could arise from the user operating the vehicle remotely during repair or maintenance. While repair mode is active, vehicle functions such as windows, air conditioning or horn and hazard lights cannot be controlled remotely through the BYD App.

Head-unit Smart Charging page with Scheduled departure set to ON, a card showing a departure time of 08:00 Every Day and Concessionary tariff hours: 00:00-07:00, a Switch to scheduled charging button, and footer links for climate control for the smart cabin and low temperature battery pre-heating. — The scheduled departure screen, including the off-peak tariff window.

[SEAL, SEAL U EV] AC charging current limit added#

Steps: 6 A, 8 A, 10 A, 16 A, MAX. This current value is the current per phase when AC charging.

Example: on a 230 V three-phase charging station, 16 A (16 A per phase, i.e. 48 A across all three phases) corresponds to MAX, the maximum AC charging power value.

Path: Settings → Energy → Charging & Discharging → AC charging current limit.

Target scenarios: limiting the vehicle’s charging power helps avoid overloading the household electricity supply and reduces high electricity costs during peak periods. The house wiring is old, and charging at full power for a longer time can cause an overload. In some countries a tiered electricity price applies during peak periods, which can lead to very high charging costs if the home charger runs at maximum power.

Head-unit Energy settings, Charging and Discharging tab: Smart Charging, Charging Port Immobilizer System set to Disable, a Battery Preheating toggle that is off, and an AC Charging Current Limit (A) row starting at 6 and 8, partly covered by the toast Current battery charging conditions are suitable, and no preheating is required. — The AC charging current limit sits directly below battery preheating in the Energy menu.

Optimisations#

System user interface optimised with a next-generation design upgrade#

The user interface has been updated in full to version 5.0 and offers a more intuitive, modern and intelligent experience.

The new design follows the current UI in models such as the Sealion 07 and the New Tang, for a consistent, high-quality visual experience across the whole model range.

Head-unit home screen in the new UI: landscape wallpaper, and a bottom widget row with an Apple CarPlay shortcut, navigation shortcuts (Home, Work), a media widget playing DAB KINK DISTORTION, a Bluetooth widget showing Not connected, and a tyre pressure card reading 2.8 bar and 2.7 bar. — The version 5.0 home screen.

Head-unit app grid in the new UI with a Done button and round icons for Vehicle Image, BYD Assistant, Smart Charging, BYD Store, Themes, Settings, a screen-recorder app, Spotify, Albums, Data Monitor, Apple CarPlay (greyed out) and Android Auto, each with a blue plus badge for adding it to the desktop. — The redesigned app grid, in add-to-desktop mode.

Driving password V2.0#

Upgrade of the driving password:

It is now linked to the cloud through the BYD App, the physical key and the digital key, giving users a more convenient and secure way to open and start the vehicle.
The same BYD app operating password can be used to drive the vehicle.
Forgotten password: instructions for resetting the password, and setting the operating password in the BYD App.

The head unit states that the driving password is the same as the operating password set in the BYD App. In the BYD App, Remote Control Verification requires the operating password to be confirmed once within five minutes of using vehicle control; the verification frequency can be set and Face ID can be used instead of the password. If no operating password has been set, the head unit refuses to switch the driving password function on and points the user to the BYD App.

Composite of head-unit and phone screens joined by arrows: the head-unit Locks settings with a Driving Password row, a remote door-opening selector set to All Doors and Auto Lock while Driving switched on; the head-unit Driving password page with the toggle off; and the BYD App screen Remote Control Verification with the verification toggle on, a verification frequency of Verify once, a Change password row and a Face ID toggle. A blue banner explains that users can set up ways to open the car such as cloud service settings, physical key and digital key. — How the driving password ties the head unit, the BYD App and the keys together.

Head-unit Driving password settings page with a single toggle, switched off, labelled Use the driving password to drive the car with a physical key, and the note Driving password is the same as the operation password set in the BYD App. — The driving password switch in the head unit.

Further optimisations#

Fix for a customer problem where the other party could hear an echo during phone calls when the mobile phone was connected over Android Auto and Bluetooth. — SEAL
Fix for a problem where the seat adjustment button on the PAD disappeared after a tow bar had been fitted. — SEAL
Optimisation of the translations for several system languages (Polish in particular). — All models
Optimisation of the anti-theft alarm system and reduction of false alarms. — SEAL U DMI RHD
Removal of the inaccurate speed display on the navigation. — All models
Fix for the problem with offset and fluctuation of the fuel tank pressure signal. — SEAL U DMI
Optimisation of the radar alarm range after switching from “P” to “D”. — SEAL U DMI RHD

Notes#

- Scheduled charging time can only be set once in one day. (printed inside the scheduled charging / scheduled departure comparison on page 13)

What we have not verified#

This is a translation of BYD Austria’s bulletin, not a test: we have not installed V2.0.0 on a Seal, Atto 2, Seal U and Seal U DM-i.
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.