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: 6,659 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: Black
• CO2: 20 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2025 BYD Seal U Boost has covered 6,659 miles. Priced at £23,795, it is advertised £638 below the AskCar estimate of £24,433. The AskCar estimate uses UK dealer asking prices, including 853 BYD Seal U adverts, and accounts for the car’s age, mileage and specification. We first saw this car advertised 44 days ago. Its asking price has since fallen by £1,200. The seller is Pentagon Derby, based in Derby. 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: £638 (2%) under the AskCar estimate of £24,433.

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 44 days.

Price history

AskCar first saw this advert on 21 September 2026 at £24,995. Its asking price is now £23,795, £1,200 less. The latest price cut was seen on 3 November 2026.

Price changes recorded:

• 21 September 2026: £24,995
• 2 October 2026: £24,356
• 16 October 2026: £23,995
• 3 November 2026: £23,795

Mileage and MOT

MOT: first test not yet due.

Advertised mileage is about 1,500 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: 6,655 miles. Price: £23,519, £276 less than this car. Dealer: Vertu BYD Worcester in Worcester. AskCar page: https://askcar.co.uk/car/byd-seal-u-2025-02e462e5cce9
• 2025 BYD Seal U Boost, 1.5 plug-in hybrid SUV, blue. Mileage: 6,735 miles. Price: £23,390, £405 less than this car. Dealer: Motor Village in Stoke-on-Trent. AskCar page: https://askcar.co.uk/car/byd-seal-u-2025-74867024bf9e
• 2025 BYD Seal U Boost, 1.5 plug-in hybrid SUV, grey. Mileage: 6,538 miles. Price: £23,880, £85 more than this car. Dealer: D. M. Keith in Doncaster. AskCar page: https://askcar.co.uk/car/byd-seal-u-2025-81e44933916c

• The nearest: 2025 BYD Seal U Boost, 1.5 plug-in hybrid SUV, blue, under a mile from this car. Mileage: 7,262 miles. Price: £22,649, £1,146 less than this car. Dealer: Pentagon Derby in Derby. AskCar page: https://askcar.co.uk/car/byd-seal-u-2025-6be9227df601