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: 12,831 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: White
• CO2: 20 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2026 BYD Seal U Boost is advertised with 12,831 miles, approximately 10,800 above the typical mileage for its age. The AskCar estimate for this car is £24,029. It is priced at £23,300, which is £729 below that estimate. The AskCar estimate uses UK dealer asking prices, including 859 BYD Seal U adverts, and accounts for the car’s age, mileage and specification. We first recorded this advert 19 days ago, and its asking price has since fallen by £100. The seller is Marshall BYD Canterbury, based in Canterbury. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 5 November 2026.

How we estimate prices and check cars

Price

Fair price: £729 (3%) under the AskCar estimate of £24,029.

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 859 priced BYD Seal U adverts across different ages and specifications, as of 5 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 374 for sale on AskCar, as of 5 November 2026.

Time on sale

This 2026 BYD Seal U has been on sale for at least 19 days.

Price history

AskCar first saw this advert on 17 October 2026 at £23,400. Its asking price is now £23,300, £100 less. The latest price cut was seen on 29 October 2026.

Price changes recorded:

• 17 October 2026: £23,400
• 29 October 2026: £23,300

Mileage and MOT

MOT: first test not yet due.

Advertised mileage is about 10,800 miles higher than the median mileage of a 2026 BYD Seal U on AskCar.

Similar cars

255 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 5 November 2026.

The 3 closest to this car in mileage:

• 2026 BYD Seal U Boost, 1.5 plug-in hybrid SUV, blue. Mileage: 12,843 miles. Price: £22,742, £558 less than this car. Dealer: D. M. Keith in Doncaster. AskCar page: https://askcar.co.uk/car/byd-seal-u-2026-ef42b93fcaf4
• 2026 BYD Seal U Boost, 1.5 plug-in hybrid SUV, blue. Mileage: 12,765 miles. Price: £22,599, £701 less than this car. Dealer: D. M. Keith in Leeds. AskCar page: https://askcar.co.uk/car/byd-seal-u-2026-d56821b729f4
• 2026 BYD Seal U Boost, 1.5 plug-in hybrid SUV, white. Mileage: 12,916 miles. Price: £23,300, the same price as this car. Dealer: Marshall BYD St Neots in St Neots. AskCar page: https://askcar.co.uk/car/byd-seal-u-2026-7c1a2f1810e0

• The nearest: 2026 BYD Seal U Boost, 1.5 plug-in hybrid SUV, grey, under a mile from this car. Mileage: 4,707 miles. Price: £25,199, £1,899 more than this car. Dealer: cinch in Canterbury. AskCar page: https://askcar.co.uk/car/byd-seal-u-2026-76b67c4ff74d