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: 3,745 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: Grey
• CO2: 20 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2025 BYD Seal U Boost is advertised with 3,745 miles, approximately 4,300 below the typical mileage for its age. Its asking price of £23,599 is £1,412 below the AskCar estimate of £25,011. To work out the AskCar estimate, we analyse UK dealer adverts for 859 BYD Seal U cars across different ages and specifications. The dealer may accept less. This car has been on sale for at least 145 days, and its asking price is down £3,110. The seller is D. M. Keith BYD Hull, based in Hull. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 5 November 2026.

How we estimate prices and check cars

Price

Fair price: £1,412 (5%) under the AskCar estimate of £25,011.

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 859 priced BYD Seal U adverts across different ages and specifications, as of 5 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 495 for sale on AskCar, as of 5 November 2026.

Time on sale

The dealer may accept less. This 2025 BYD Seal U has been on sale for at least 145 days, and its asking price has been cut by £3,110. About half of 2025 BYD Seal U cars are gone from sale within a month of being advertised: 611 of the 1,181 first advertised between 8 July 2026 and 2 October 2026.

Price history

AskCar first saw this advert on 13 June 2026 at £26,709. Its asking price is now £23,599, £3,110 less. The latest price cut was seen on 21 October 2026.

Price changes recorded:

• 21 June 2026: £26,709
• 22 June 2026: £26,644
• 25 June 2026: £26,589
• 29 June 2026: £26,537
• 2 July 2026: £26,471
• 3 July 2026: £26,331
• 6 July 2026: £26,111
• 7 July 2026: £26,257
• 15 July 2026: £25,964
• 17 July 2026: £25,737
• 27 July 2026: £25,568
• 2 August 2026: £25,554
• 3 August 2026: £25,547
• 19 August 2026: £24,590
• 20 August 2026: £26,492
• 21 August 2026: £26,435
• 25 August 2026: £26,497
• 27 August 2026: £26,417
• 2 September 2026: £26,360
• 5 September 2026: £26,303
• 8 September 2026: £26,171
• 10 September 2026: £26,020
• 12 September 2026: £25,961
• 17 September 2026: £25,891
• 18 September 2026: £25,733
• 19 September 2026: £25,685
• 20 September 2026: £25,618
• 21 September 2026: £25,608
• 22 September 2026: £25,577
• 23 September 2026: £25,557
• 24 September 2026: £25,516
• 25 September 2026: £25,441
• 26 September 2026: £25,252
• 27 September 2026: £25,235
• 29 September 2026: £25,210
• 30 September 2026: £25,226
• 2 October 2026: £25,039
• 3 October 2026: £24,714
• 11 October 2026: £24,323
• 12 October 2026: £24,315
• 13 October 2026: £24,305
• 14 October 2026: £24,315
• 21 October 2026: £23,599

Mileage and MOT

MOT: first test not yet due.

Advertised mileage is about 4,300 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 5 November 2026.

The 3 closest to this car in mileage:

• 2025 BYD Seal U Boost, 1.5 plug-in hybrid SUV, grey. Mileage: 3,682 miles. Price: £23,690, £91 more than this car. Dealer: Snows BYD Newbury in Newbury. AskCar page: https://askcar.co.uk/car/byd-seal-u-2025-f384aec6057c
• 2025 BYD Seal U Boost, 1.5 plug-in hybrid SUV, grey. Mileage: 4,057 miles. Price: £24,990, £1,391 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, grey. Mileage: 3,321 miles. Price: £23,500, £99 less than this car. Dealer: Sytner Select Swindon in Swindon. AskCar page: https://askcar.co.uk/car/byd-seal-u-2025-4c3690ff48ea

• The nearest: 2025 BYD Seal U Boost, 1.5 plug-in hybrid SUV, white, 33 miles from this car. Mileage: 10,721 miles. Price: £23,222, £377 less than this car. Dealer: D. M. Keith Cupra York in York. AskCar page: https://askcar.co.uk/car/byd-seal-u-2025-1e3b9c14a18f