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: 11,795 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 11,795 miles, around 7,900 more miles than is typical for its age. Priced at £23,400, it is advertised £515 below the AskCar estimate of £23,915. To work out the AskCar estimate, we analyse UK dealer adverts for 914 BYD Seal U cars across different ages and specifications. We first saw this car advertised 54 days ago. Its asking price has since fallen by £1,200. 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: £515 (2%) under the AskCar estimate of £23,915.

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

This 2026 BYD Seal U has been on sale for at least 54 days.

Price history

AskCar first saw this advert on 19 September 2026 at £24,600. Its asking price is now £23,400, £1,200 less. The latest price cut was seen on 11 November 2026.

Price changes recorded:

• 19 September 2026: £24,600
• 23 September 2026: £24,300
• 25 September 2026: £23,900
• 2 October 2026: £23,700
• 11 November 2026: £23,400

Mileage and MOT

MOT: first test not yet due.

Advertised mileage is about 7,900 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: 11,776 miles. Price: £23,299, £101 less than this car. Dealer: Vertu BYD Morpeth in Morpeth. AskCar page: https://askcar.co.uk/car/byd-seal-u-2026-e20574c73ce6
• 2026 BYD Seal U Boost, 1.5 plug-in hybrid SUV, black. Mileage: 11,772 miles. Price: £23,399, the same price as this car. Dealer: cinch in St Neots. AskCar page: https://askcar.co.uk/car/byd-seal-u-2026-6214e1333a0b
• 2026 BYD Seal U Boost, 1.5 plug-in hybrid SUV, black. Mileage: 11,837 miles. Price: £23,350, £50 less than this car. Dealer: Swansway Garages BYD Stoke in Stoke-on-Trent. AskCar page: https://askcar.co.uk/car/byd-seal-u-2026-cb8aee84eed7

• 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, £4,090 more than this car. Dealer: Marshall BYD Maidstone in Maidstone. AskCar page: https://askcar.co.uk/car/byd-seal-u-2026-28c1c5405a76