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: 8,595 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: White
• CO2: 20 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2025 BYD Seal U Boost is advertised with 8,595 miles on the clock. Its asking price of £23,500 is £446 below the AskCar estimate of £23,946. The AskCar estimate draws on 853 BYD Seal U adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. We first saw this car advertised 20 days ago. Its asking price has since fallen by £700. 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: £446 (1%) under the AskCar estimate of £23,946.

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 20 days.

Price history

AskCar first saw this advert on 15 October 2026 at £24,200. Its asking price is now £23,500, £700 less. The latest price cut was seen on 29 October 2026.

Price changes recorded:

• 15 October 2026: £24,200
• 17 October 2026: £23,700
• 29 October 2026: £23,500

Mileage and MOT

MOT: first test not yet due.

Advertised mileage is about 400 miles higher 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: 8,410 miles. Price: £23,772, £272 more than this car. Dealer: Vertu BYD Morpeth in Morpeth. AskCar page: https://askcar.co.uk/car/byd-seal-u-2025-6587f99f2752
• 2025 BYD Seal U Boost, 1.5 plug-in hybrid SUV, black. Mileage: 8,807 miles. Price: £23,995, £495 more than this car. Dealer: Pentagon BYD Burton in Burton upon Trent. AskCar page: https://askcar.co.uk/car/byd-seal-u-2025-9f862c9f553a
• 2025 BYD Seal U Boost, 1.5 plug-in hybrid SUV, grey. Mileage: 8,945 miles. Price: £23,500, the same price as this car. Dealer: Marshall BYD Northampton in Northampton. AskCar page: https://askcar.co.uk/car/byd-seal-u-2025-7dfc3f162598

• 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, £101 less than this car. Dealer: cinch in Ashford. AskCar page: https://askcar.co.uk/car/byd-seal-u-2025-46407b6d8b2c