2026 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: 2026
• Mileage: 12,071 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 2026 BYD Seal U Boost is advertised with 12,071 miles, approximately 10,100 above the typical mileage for its age. The dealer is asking £23,590, which is £547 below the AskCar estimate of £24,137. To work out the AskCar estimate, we analyse UK dealer adverts for 853 BYD Seal U cars across different ages and specifications. It first appeared in our advert records 3 days ago. The seller is Swansway Garages BYD Chester, based in Chester. 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: £547 (2%) under the AskCar estimate of £24,137.

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 2026 BYD Seal U with the 1.5 plug-in hybrid engine is typically advertised at £27,000: the median of the 366 for sale on AskCar, as of 4 November 2026.

Time on sale

AskCar first saw this 2026 BYD Seal U advertised 3 days ago. About half of 2026 BYD Seal U cars are gone from sale within a month of being advertised: 151 of the 300 first advertised between 10 July 2026 and 1 October 2026.

Price history

AskCar first saw this advert on 1 November 2026 at £23,590. Its asking price has not changed.

Mileage and MOT

MOT: first test not yet due.

Advertised mileage is about 10,100 miles higher than the median mileage of a 2026 BYD Seal U on AskCar.

Similar cars

254 other 2026 BYD Seal U Boost 1.5 plug-in hybrid automatic SUVs are for sale at UK dealers, from £22,742 to £35,595, as of 4 November 2026.

The 3 closest to this car in mileage:

• 2026 BYD Seal U Boost, 1.5 plug-in hybrid SUV, white. Mileage: 12,039 miles. Price: £23,300, £290 less than this car. Dealer: Marshall BYD Peterborough in Peterborough. AskCar page: https://askcar.co.uk/car/byd-seal-u-2026-afd1ab77ee16
• 2026 BYD Seal U Boost, 1.5 plug-in hybrid SUV, black. Mileage: 12,038 miles. Price: £23,800, £210 more than this car. Dealer: Marshall BYD Peterborough in Peterborough. AskCar page: https://askcar.co.uk/car/byd-seal-u-2026-a968590d2d5a
• 2026 BYD Seal U Boost, 1.5 plug-in hybrid SUV, black. Mileage: 12,160 miles. Price: £27,489, £3,899 more than this car. Dealer: Desmond Motors Londonderry in Derry. AskCar page: https://askcar.co.uk/car/byd-seal-u-2026-b9fc50dccc0a

• The nearest: 2026 BYD Seal U Boost, 1.5 plug-in hybrid SUV, black, under a mile from this car. Mileage: 8,058 miles. Price: £24,290, £700 more than this car. Dealer: Swansway Garages BYD Chester in Chester. AskCar page: https://askcar.co.uk/car/byd-seal-u-2026-33518145fd63