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: 8,000 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

The advertised mileage for this 2025 BYD Seal U Boost is 8,000 miles. Priced at £24,280, it is advertised £185 above the AskCar estimate of £24,095. 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 33 days ago. Its asking price has since fallen by £415. The seller is Grainger Motor Group Mantles BYD Royston, based in Royston. 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: £185 (under 1%) over the AskCar estimate of £24,095.

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 33 days.

Price history

AskCar first saw this advert on 2 October 2026 at £24,695. Its asking price is now £24,280, £415 less. The latest price cut was seen on 28 October 2026.

Price changes recorded:

• 2 October 2026: £24,695
• 11 October 2026: £24,600
• 18 October 2026: £24,490
• 28 October 2026: £24,280

Mileage and MOT

MOT: first test not yet due.

Advertised mileage is about 200 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, grey. Mileage: 8,064 miles. Price: £23,599, £681 less than this car. Dealer: Hendy Peugeot & Vauxhall Tonbridge in Tonbridge. AskCar page: https://askcar.co.uk/car/byd-seal-u-2025-c2b8935ee28c
• 2025 BYD Seal U Boost, 1.5 plug-in hybrid SUV, blue. Mileage: 7,829 miles. Price: £24,498, £218 more than this car. Dealer: Arnold Clark Stirling Volvo / GWM / BYD in Stirling. AskCar page: https://askcar.co.uk/car/byd-seal-u-2025-b92b577ea6fa
• 2025 BYD Seal U Boost, 1.5 plug-in hybrid SUV, grey. Mileage: 7,817 miles. Price: £23,600, £680 less than this car. Dealer: Marshall BYD Maidstone in Maidstone. AskCar page: https://askcar.co.uk/car/byd-seal-u-2025-c6bef291d7ef

• The nearest: 2025 BYD Seal U Boost, 1.5 plug-in hybrid SUV, blue, under a mile from this car. Mileage: 4,565 miles. Price: £23,590, £690 less than this car. Dealer: EMG Motor Group in Royston. AskCar page: https://askcar.co.uk/car/byd-seal-u-2025-28ee3347cec1