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: 6,421 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

The advertised mileage for this 2025 BYD Seal U Boost is 6,421 miles. Priced at £24,995, it is advertised £501 above the AskCar estimate of £24,494. To work out the AskCar estimate, we analyse UK dealer adverts for 853 BYD Seal U cars across different ages and specifications. The dealer may accept less. This car has been on sale for at least 144 days, and its asking price is down £2,170. The seller is WJ King Vauxhall & BYD Bromley, based in Bromley. 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: £501 (2%) over the AskCar estimate of £24,494.

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

The dealer may accept less. This 2025 BYD Seal U has been on sale for at least 144 days, and its asking price has been cut by £2,170. About half of 2025 BYD Seal U cars are gone from sale within a month of being advertised: 605 of the 1,172 first advertised between 8 July 2026 and 1 October 2026.

Price history

AskCar first saw this advert on 13 June 2026 at £27,165. Its asking price is now £24,995, £2,170 less. The latest price cut was seen on 4 November 2026.

Price changes recorded:

• 18 June 2026: £27,165
• 2 July 2026: £26,665
• 5 July 2026: £26,265
• 16 July 2026: £25,995
• 23 July 2026: £25,965
• 30 July 2026: £25,765
• 6 August 2026: £25,595
• 8 August 2026: £25,565
• 13 August 2026: £25,535
• 31 August 2026: £25,495
• 15 October 2026: £25,395
• 21 October 2026: £25,295
• 28 October 2026: £25,195
• 4 November 2026: £24,995

Mileage and MOT

MOT: first test not yet due.

Advertised mileage is about 1,700 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: 6,384 miles. Price: £23,799, £1,196 less than this car. Dealer: cinch in St Neots. AskCar page: https://askcar.co.uk/car/byd-seal-u-2025-2181e374e819
• 2025 BYD Seal U Boost, 1.5 plug-in hybrid SUV, blue. Mileage: 6,368 miles. Price: £25,999, £1,004 more than this car. Dealer: Gates Of Stevenage in Stevenage. AskCar page: https://askcar.co.uk/car/byd-seal-u-2025-dab04d962aff
• 2025 BYD Seal U Boost, 1.5 plug-in hybrid SUV, white. Mileage: 6,327 miles. Price: £23,599, £1,396 less than this car. Dealer: Halliwell Jones North Wales BYD in Conwy. AskCar page: https://askcar.co.uk/car/byd-seal-u-2025-52d80c68c2c1

• The nearest: 2025 BYD Seal U Boost, 1.5 plug-in hybrid SUV, grey, 18 miles from this car. Mileage: 8,064 miles. Price: £23,599, £1,396 less than this car. Dealer: Hendy Peugeot & Vauxhall Tonbridge in Tonbridge. AskCar page: https://askcar.co.uk/car/byd-seal-u-2025-c2b8935ee28c