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: 12,049 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 12,049 miles, approximately 8,200 above the typical mileage for its age. Its asking price of £23,900 is £21 above the AskCar estimate of £23,879. The AskCar estimate uses 914 UK dealer adverts for the BYD Seal U, with adjustments for age, mileage, trim, engine and other specifications. We first recorded this advert 1 day ago, and its asking price has since fallen by £300. The seller is Marshall BYD Maidstone, based in Maidstone. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 12 November 2026.

How we estimate prices and check cars

Price

Fair price: £21 (under 1%) over the AskCar estimate of £23,879.

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 914 priced BYD Seal U adverts across different ages and specifications, as of 12 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 400 for sale on AskCar, as of 12 November 2026.

Time on sale

AskCar first saw this 2026 BYD Seal U advertised 1 day ago. About half of 2026 BYD Seal U cars are gone from sale within a month of being advertised: 178 of the 341 first advertised between 13 July 2026 and 9 October 2026.

Price history

AskCar first saw this advert on 11 November 2026 at £24,200. Its asking price is now £23,900, £300 less. The latest price cut was seen on 12 November 2026.

Price changes recorded:

• 11 November 2026: £24,200
• 12 November 2026: £23,900

Mileage and MOT

MOT: first test not yet due.

Advertised mileage is about 8,200 miles higher than the median mileage of a 2026 BYD Seal U on AskCar.

Similar cars

275 other 2026 BYD Seal U Boost 1.5 plug-in hybrid automatic SUVs are for sale at UK dealers, from £22,599 to £35,595, as of 12 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, £600 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: £23,600, £300 less 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, grey. Mileage: 12,062 miles. Price: £22,599, £1,301 less than this car. Dealer: D. M. Keith in Doncaster. AskCar page: https://askcar.co.uk/car/byd-seal-u-2026-21f75d081d33

• The nearest: 2026 BYD Seal U Boost, 1.5 plug-in hybrid SUV, blue, under a mile from this car. Mileage: 2,510 miles. Price: £27,490, £3,590 more than this car. Dealer: Marshall BYD Maidstone in Maidstone. AskCar page: https://askcar.co.uk/car/byd-seal-u-2026-28c1c5405a76