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: 7,308 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 7,308 miles on the clock. The dealer is asking £23,600, which is £669 below the AskCar estimate of £24,269. To work out the AskCar estimate, we analyse UK dealer adverts for 853 BYD Seal U cars across different ages and specifications. We first recorded this car for sale 6 days ago. The seller is Marshall BYD Ashford, based in Ashford. 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: £669 (2%) under the AskCar estimate of £24,269.

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

AskCar first saw this 2025 BYD Seal U advertised 6 days ago. 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 29 October 2026 at £23,600. Its asking price has not changed.

Mileage and MOT

MOT: first test not yet due.

Advertised mileage is about 800 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, blue. Mileage: 7,297 miles. Price: £22,985, £615 less than this car. Dealer: Lookers BYD Sheffield in Sheffield. AskCar page: https://askcar.co.uk/car/byd-seal-u-2025-b13cced8134c
• 2025 BYD Seal U Boost, 1.5 plug-in hybrid SUV, blue. Mileage: 7,262 miles. Price: £22,649, £951 less than this car. Dealer: Pentagon Derby in Derby. AskCar page: https://askcar.co.uk/car/byd-seal-u-2025-6be9227df601
• 2025 BYD Seal U Boost, 1.5 plug-in hybrid SUV, grey. Mileage: 7,369 miles. Price: £24,019, £419 more than this car. Dealer: Vertu BYD Gloucester in Gloucester. AskCar page: https://askcar.co.uk/car/byd-seal-u-2025-20dc76ea5259

• The nearest: 2025 BYD Seal U Boost, 1.5 plug-in hybrid SUV, white, under a mile from this car. Mileage: 9,673 miles. Price: £23,399, £201 less than this car. Dealer: cinch in Ashford. AskCar page: https://askcar.co.uk/car/byd-seal-u-2025-46407b6d8b2c