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: 11,377 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 is advertised with 11,377 miles, approximately 9,400 above the typical mileage for its age. Priced at £23,500, it is advertised £735 below the AskCar estimate of £24,235. The AskCar estimate uses 853 UK dealer adverts for the BYD Seal U, with adjustments for age, mileage, trim, engine and other specifications. We first saw this car advertised 8 days ago. Its asking price has since fallen by £600. The seller is Marshall BYD Northampton, based in Northampton. 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: £735 (3%) under the AskCar estimate of £24,235.

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 8 days.

Price history

AskCar first saw this advert on 27 October 2026 at £24,100. Its asking price is now £23,500, £600 less. The latest price cut was seen on 29 October 2026.

Price changes recorded:

• 27 October 2026: £24,100
• 29 October 2026: £23,500

Mileage and MOT

MOT: first test not yet due.

Advertised mileage is about 9,400 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, black. Mileage: 11,336 miles. Price: £24,454, £954 more than this car. Dealer: Evans Halshaw BYD Shrewsbury in Shrewsbury. AskCar page: https://askcar.co.uk/car/byd-seal-u-2026-c0fd9903b992
• 2026 BYD Seal U Boost, 1.5 plug-in hybrid SUV, white. Mileage: 11,441 miles. Price: £22,877, £623 less than this car. Dealer: D. M. Keith in Leeds. AskCar page: https://askcar.co.uk/car/byd-seal-u-2026-33f974ddc7cd
• 2026 BYD Seal U Boost, 1.5 plug-in hybrid SUV, blue. Mileage: 11,507 miles. Price: £22,990, £510 less than this car. Dealer: Snows BYD Newbury in Newbury. AskCar page: https://askcar.co.uk/car/byd-seal-u-2026-5c2d4ec9ecf2

• The nearest: 2026 BYD Seal U Boost, 1.5 plug-in hybrid SUV, black, under a mile from this car. Mileage: 8,314 miles. Price: £23,900, £400 more than this car. Dealer: Marshall BYD Northampton in Northampton. AskCar page: https://askcar.co.uk/car/byd-seal-u-2026-15ab27190f5f