2025 BYD Seal U 1.5 Boost

Overview

• Make: BYD
• Model: Seal U
• Trim: Boost
• Version: 1.5 18.3kWh Boost CVT FWD Euro 6 (s/s) 5dr (214 bhp)
• Year: 2025
• Mileage: 4,279 miles
• Fuel: Plug-in hybrid (petrol)
• Body: SUV, 5 doors, 5 seats
• Engine: 1.5 litres, 214 bhp
• Gearbox: Automatic (CVT)
• Drive: Front-wheel drive
• Colour: Blue
• CO2: 20 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 4,279 miles on the clock, this 2025 BYD Seal U Boost has done roughly 3,900 fewer miles than a typical 2025 BYD Seal U. Its asking price of £23,490 is £1,456 below the AskCar estimate of £24,946. To work out the AskCar estimate, we analyse UK dealer adverts for 853 BYD Seal U cars across different ages and specifications. Since we first spotted the advert 47 days ago, the asking price has dropped by £1,500. The seller is Snows BYD Southampton, based in Southampton. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 4 November 2026.

How we estimate prices and check cars

Price

Fair price: £1,456 (5%) under the AskCar estimate of £24,946.

The AskCar estimate is our expected asking price for this car. It uses UK dealer asking prices, accounting for make, model, trim, version, age, mileage, fuel, gearbox, body type, driven wheels, engine size and power. It is an advertised price, not a confirmed sale price.

It draws on 853 priced BYD Seal U adverts across different ages and specifications, as of 4 November 2026.

A 2025 BYD Seal U with the 1.5 plug-in hybrid engine is typically advertised at £24,600: the median of the 497 for sale on AskCar, as of 4 November 2026.

Time on sale

This 2025 BYD Seal U has been on sale for at least 47 days.

Price history

AskCar first saw this advert on 18 September 2026 at £24,990. Its asking price is now £23,490, £1,500 less. The latest price cut was seen on 3 November 2026.

Price changes recorded:

• 18 September 2026: £24,990
• 20 September 2026: £24,690
• 23 October 2026: £23,990
• 3 November 2026: £23,490

Mileage and MOT

MOT: first test not yet due.

Advertised mileage is about 3,900 miles lower than the median mileage of a 2025 BYD Seal U on AskCar.

Similar cars

102 other 2025 BYD Seal U Boost 1.5 plug-in hybrid automatic SUVs are for sale at UK dealers, from £22,440 to £33,995, as of 4 November 2026.

The 3 closest to this car in mileage:

• 2025 BYD Seal U Boost, 1.5 plug-in hybrid SUV, grey. Mileage: 4,499 miles. Price: £25,290, £1,800 more than this car. Dealer: SG Petch Darlington in Darlington. AskCar page: https://askcar.co.uk/car/byd-seal-u-2025-1876f1cc67ff
• 2025 BYD Seal U Boost, 1.5 plug-in hybrid SUV, grey. Mileage: 4,057 miles. Price: £24,990, £1,500 more than this car. Dealer: SG Petch Darlington in Darlington. AskCar page: https://askcar.co.uk/car/byd-seal-u-2025-beec2cf12cac
• 2025 BYD Seal U Boost, 1.5 plug-in hybrid SUV, blue. Mileage: 4,511 miles. Price: £23,997, £507 more than this car. Dealer: Halliwell Jones North Wales BYD in Conwy. AskCar page: https://askcar.co.uk/car/byd-seal-u-2025-42e60796a161

• The nearest: 2025 BYD Seal U Boost, 1.5 plug-in hybrid SUV, black, 31 miles from this car. Mileage: 9,195 miles. Price: £23,490, the same price as this car. Dealer: Snows BYD Chichester in Chichester. AskCar page: https://askcar.co.uk/car/byd-seal-u-2025-75ba6b1d91d0