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: 9,934 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: Blue
• CO2: 20 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

The advertised mileage for this 2025 BYD Seal U Boost is 9,934 miles. Its asking price of £23,399 is £216 below the AskCar estimate of £23,615. The AskCar estimate uses 853 UK dealer adverts for the BYD Seal U, with adjustments for age, mileage, trim, engine and other specifications. We first saw this car advertised 57 days ago. Its asking price has since fallen by £600. It is for sale at Halliwell Jones North Wales BYD in Llandudno Junction. 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: £216 (under 1%) under the AskCar estimate of £23,615.

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 57 days.

Price history

AskCar first saw this advert on 8 September 2026 at £23,999. Its asking price is now £23,399, £600 less. The latest price cut was seen on 27 October 2026.

Price changes recorded:

• 8 September 2026: £23,999
• 24 September 2026: £23,699
• 17 October 2026: £23,499
• 27 October 2026: £23,399

Mileage and MOT

MOT: first test not yet due.

Advertised mileage is about 1,800 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: 9,962 miles. Price: £23,499, £100 more than this car. Dealer: Halliwell Jones North Wales BYD in Conwy. AskCar page: https://askcar.co.uk/car/byd-seal-u-2025-dd02ac1ff5cf
• 2025 BYD Seal U Boost, 1.5 plug-in hybrid SUV, grey. Mileage: 9,882 miles. Price: £22,779, £620 less than this car. Dealer: D. M. Keith in Leeds. AskCar page: https://askcar.co.uk/car/byd-seal-u-2025-4e7890213424
• 2025 BYD Seal U Boost, 1.5 plug-in hybrid SUV, white. Mileage: 9,673 miles. Price: £23,399, the same price as this car. Dealer: cinch in Ashford. AskCar page: https://askcar.co.uk/car/byd-seal-u-2025-46407b6d8b2c

• The nearest: 2025 BYD Seal U Boost, 1.5 plug-in hybrid SUV, blue, under a mile from this car. Mileage: 4,511 miles. Price: £23,997, £598 more than this car. Dealer: Halliwell Jones North Wales BYD in Conwy. AskCar page: https://askcar.co.uk/car/byd-seal-u-2025-42e60796a161