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: 7,429 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

The advertised mileage for this 2025 BYD Seal U Boost is 7,429 miles. Its asking price of £23,600 is £786 below the AskCar estimate of £24,386. The AskCar estimate uses 850 UK dealer adverts for the BYD Seal U, with adjustments for age, mileage, trim, engine and other specifications. This car was first seen in our listings data 4 days ago. The seller is Marshall BYD Canterbury, based in Canterbury. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 2 November 2026.

How we estimate prices and check cars

Price

Fair price: £786 (3%) under the AskCar estimate of £24,386.

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 850 priced BYD Seal U adverts across different ages and specifications, as of 2 November 2026.

A 2025 BYD Seal U with the 1.5 plug-in hybrid engine is typically advertised at £24,700: the median of the 484 for sale on AskCar, as of 2 November 2026.

Time on sale

AskCar first saw this 2025 BYD Seal U advertised 4 days ago. About half of 2025 BYD Seal U cars are gone from sale within a month of being advertised: 588 of the 1,146 first advertised between 8 July 2026 and 29 September 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 900 miles lower than the median mileage of a 2025 BYD Seal U on AskCar.

Similar cars

97 other 2025 BYD Seal U Boost 1.5 plug-in hybrid automatic SUVs are for sale at UK dealers, from £14,999 to £33,995, as of 2 November 2026.

The 3 closest to this car in mileage:

• 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
• 2025 BYD Seal U Boost, 1.5 plug-in hybrid SUV, grey. Mileage: 7,492 miles. Price: £24,499, £899 more than this car. Dealer: Hartwell Reading in Reading. AskCar page: https://askcar.co.uk/car/byd-seal-u-2025-61b38461d10c
• 2025 BYD Seal U Boost, 1.5 plug-in hybrid SUV, grey. Mileage: 7,308 miles. Price: £23,600, the same price as this car. Dealer: Marshall BYD Ashford in Ashford. AskCar page: https://askcar.co.uk/car/byd-seal-u-2025-a7f2cf0dfc29

• The nearest: 2025 BYD Seal U Boost, 1.5 plug-in hybrid SUV, white, under a mile from this car. Mileage: 5,604 miles. Price: £23,499, £101 less than this car. Dealer: cinch in Canterbury. AskCar page: https://askcar.co.uk/car/byd-seal-u-2025-067ad67c8d3a