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: 3,993 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: Grey
• CO2: 20 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

The advertised mileage for this 2026 BYD Seal U Boost is 3,993 miles. Its asking price of £28,499 is £2,636 above the AskCar estimate of £25,863. To work out the AskCar estimate, we analyse UK dealer adverts for 853 BYD Seal U cars across different ages and specifications. The dealer may accept less. This car has been on sale for at least 68 days, and its asking price is down £1,000. The seller is Gates Of Stevenage, based in Stevenage. 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

Above the going rate: £2,636 (10%) over the AskCar estimate of £25,863.

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

The dealer may accept less. This 2026 BYD Seal U has been on sale for at least 68 days, and its asking price has been cut by £1,000. 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 28 August 2026 at £29,499. Its asking price is now £28,499, £1,000 less. The latest price cut was seen on 25 September 2026.

Price changes recorded:

• 28 August 2026: £29,499
• 25 September 2026: £28,499

Mileage and MOT

MOT: first test not yet due.

Advertised mileage is about 2,000 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, blue. Mileage: 4,179 miles. Price: £22,990, £5,509 less than this car. Dealer: Swansway Garages BYD Crewe in Crewe. AskCar page: https://askcar.co.uk/car/byd-seal-u-2026-cbb4aed8404a
• 2026 BYD Seal U Boost, 1.5 plug-in hybrid SUV, grey. Mileage: 3,795 miles. Price: £25,290, £3,209 less than this car. Dealer: Swansway Garages BYD Crewe in Crewe. AskCar page: https://askcar.co.uk/car/byd-seal-u-2026-e9f69fb9594f
• 2026 BYD Seal U Boost, 1.5 plug-in hybrid SUV, white. Mileage: 3,785 miles. Price: £24,700, £3,799 less than this car. Dealer: Marshall BYD Canterbury in Canterbury. AskCar page: https://askcar.co.uk/car/byd-seal-u-2026-7a95f50ffa5d

• The nearest: 2026 BYD Seal U Boost, 1.5 plug-in hybrid SUV, blue, under a mile from this car. Mileage: 2,860 miles. Price: £25,799, £2,700 less than this car. Dealer: Gates Of Stevenage in Stevenage. AskCar page: https://askcar.co.uk/car/byd-seal-u-2026-a419d47ab969