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: 8,733 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

This 2026 BYD Seal U Boost has covered 8,733 miles, around 6,700 more miles than is typical for its age. The dealer is asking £23,800, which is £956 below the AskCar estimate of £24,756. To work out the AskCar estimate, we analyse UK dealer adverts for 853 BYD Seal U cars across different ages and specifications. We first saw this car advertised 20 days ago. Its asking price has since fallen by £1,000. The seller is Marshall BYD Ashford, based in Ashford. 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: £956 (3%) under the AskCar estimate of £24,756.

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

This 2026 BYD Seal U has been on sale for at least 20 days.

Price history

AskCar first saw this advert on 15 October 2026 at £24,800. Its asking price is now £23,800, £1,000 less. The latest price cut was seen on 29 October 2026.

Price changes recorded:

• 15 October 2026: £24,800
• 17 October 2026: £24,000
• 29 October 2026: £23,800

Mileage and MOT

MOT: first test not yet due.

Advertised mileage is about 6,700 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: 8,691 miles. Price: £23,995, £195 more than this car. Dealer: Pentagon BYD Burton in Burton upon Trent. AskCar page: https://askcar.co.uk/car/byd-seal-u-2026-5d07ed5a5feb
• 2026 BYD Seal U Boost, 1.5 plug-in hybrid SUV, black. Mileage: 8,685 miles. Price: £23,995, £195 more than this car. Dealer: Startin BYD (Redditch) in Redditch. AskCar page: https://askcar.co.uk/car/byd-seal-u-2026-826f39ac2faa
• 2026 BYD Seal U Boost, 1.5 plug-in hybrid SUV, black. Mileage: 8,595 miles. Price: £23,800, the same price as this car. Dealer: Marshall BYD Peterborough in Peterborough. AskCar page: https://askcar.co.uk/car/byd-seal-u-2026-aab1a285d1ba

• The nearest: 2026 BYD Seal U Boost, 1.5 plug-in hybrid SUV, black, under a mile from this car. Mileage: 11,607 miles. Price: £23,400, £400 less than this car. Dealer: Marshall BYD Ashford in Ashford. AskCar page: https://askcar.co.uk/car/byd-seal-u-2026-80d102d62a9e