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: 5,688 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

With 5,688 miles on the clock, this 2026 BYD Seal U Boost has done roughly 3,200 more miles than a typical 2026 BYD Seal U. Priced at £25,650, it is advertised £24 above the AskCar estimate of £25,626. The AskCar estimate uses UK dealer asking prices, including 850 BYD Seal U adverts, and accounts for the car’s age, mileage and specification. Since we first spotted the advert 28 days ago, the asking price has dropped by £1,300. The seller is Donnelly Motorstore Dungannon, based in Dungannon. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 2 November 2026.

How we estimate prices and check cars

Price

Fair price: £24 (under 1%) over the AskCar estimate of £25,626.

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 850 priced BYD Seal U adverts across different ages and specifications, as of 2 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 362 for sale on AskCar, as of 2 November 2026.

Time on sale

This 2026 BYD Seal U has been on sale for at least 28 days.

Price history

AskCar first saw this advert on 5 October 2026 at £26,950. Its asking price is now £25,650, £1,300 less. The latest price cut was seen on 17 October 2026.

Price changes recorded:

• 5 October 2026: £26,950
• 17 October 2026: £25,650

Mileage and MOT

MOT: first test not yet due.

Advertised mileage is about 3,200 miles higher than the median mileage of a 2026 BYD Seal U on AskCar.

Similar cars

246 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 2 November 2026.

The 3 closest to this car in mileage:

• 2026 BYD Seal U Boost, 1.5 plug-in hybrid SUV, grey. Mileage: 5,631 miles. Price: £24,199, £1,451 less than this car. Dealer: cinch in Peterborough. AskCar page: https://askcar.co.uk/car/byd-seal-u-2026-b7ab570b89f1
• 2026 BYD Seal U Boost, 1.5 plug-in hybrid SUV, white. Mileage: 5,603 miles. Price: £24,400, £1,250 less than this car. Dealer: Marshall BYD Swindon in Swindon. AskCar page: https://askcar.co.uk/car/byd-seal-u-2026-97c8db18c73e
• 2026 BYD Seal U Boost, 1.5 plug-in hybrid SUV, white. Mileage: 5,536 miles. Price: £24,995, £655 less than this car. Dealer: Pentagon BYD Burton in Burton upon Trent. AskCar page: https://askcar.co.uk/car/byd-seal-u-2026-c0ea402aced7

• The nearest: 2026 BYD Seal U Boost, 1.5 plug-in hybrid SUV, black, under a mile from this car. Mileage: 10,563 miles. Price: £25,250, £400 less than this car. Dealer: Donnelly Motorstore Dungannon in Dungannon. AskCar page: https://askcar.co.uk/car/byd-seal-u-2026-e4b33efe525c