SOFTWARE UPDATE
BYD SEALION 7 software update 3.1.0: owner guide
SEALION 7 3.1.0 changes ICC and lane assistance, including curve-speed adjustment and accelerator override. It also refines phone projection, radio switching, climate-fan operation and translations.
Driving-assistance changes
- Combined ICC and Lane Departure Assist operation.
- ACC/ICC curve-speed adjustment and prevention of passing on the inside.
- Accelerator override for adjusting cruise speed.
- Emergency deceleration and hazard lights after sustained hands-off detection.
- An ICC restriction after three hands-off warnings, cleared by a restart.
Review the settings while parked; the hands-off response is a description of system behaviour, not a test to perform.
Other changes
The November 2025 archive lists interface, Android Auto, Apple CarPlay, radio-switching, climate-fan and translation refinements. It does not print a complete system identifier for this entry; match the car’s release notice to the model and 3.1.0 label.
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.
- Park where the car can remain unused for the duration shown in its update prompt.
- Read the car’s notice and match the model, edition, trim and complete package.
- Meet the battery and connection requirements shown by the car.
- Start or schedule the update through the vehicle’s own screen. Safety note: leave installation running as instructed; interrupting it or using unofficial firmware can leave the software unusable.
- Wait for the completed-update message.
- Check phone projection, radio and the changed assistance preferences. 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. If the update simply has not appeared, wait for the vehicle notification unless a function is missing or the car reports a fault.
Related links
Source: BYD owner-manual library · BYD SEALION 7 release archive. Checked 22 October 2026.