2025 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: 2025
• Mileage: 4,802 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 2025 BYD Seal U Boost is advertised with 4,802 miles, approximately 3,500 below the typical mileage for its age. The AskCar estimate for this car is £25,043. It is priced at £24,200, which is £843 below that estimate. The AskCar estimate uses 850 UK dealer adverts for the BYD Seal U, with adjustments for age, mileage, trim, engine and other specifications. We first saw this car advertised 50 days ago. Its asking price has since fallen by £1,100. The seller is Marshall BYD Swindon, based in Swindon. 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: £843 (3%) under the AskCar estimate of £25,043.

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 2025 BYD Seal U with the 1.5 plug-in hybrid engine is typically advertised at £24,700: the median of the 484 for sale on AskCar, as of 2 November 2026.

Time on sale

This 2025 BYD Seal U has been on sale for at least 50 days.

Price history

AskCar first saw this advert on 13 September 2026 at £25,300. Its asking price is now £24,200, £1,100 less. The latest price cut was seen on 29 October 2026.

Price changes recorded:

• 13 September 2026: £25,300
• 17 September 2026: £25,400
• 23 September 2026: £25,000
• 25 September 2026: £24,700
• 2 October 2026: £24,500
• 8 October 2026: £24,400
• 17 October 2026: £24,300
• 29 October 2026: £24,200

Mileage and MOT

MOT: first test not yet due.

Advertised mileage is about 3,500 miles lower than the median mileage of a 2025 BYD Seal U on AskCar.

Similar cars

97 other 2025 BYD Seal U Boost 1.5 plug-in hybrid automatic SUVs are for sale at UK dealers, from £14,999 to £33,995, as of 2 November 2026.

The 3 closest to this car in mileage:

• 2025 BYD Seal U Boost, 1.5 plug-in hybrid SUV, white. Mileage: 4,796 miles. Price: £24,495, £295 more than this car. Dealer: Hartwell Watford in Watford. AskCar page: https://askcar.co.uk/car/byd-seal-u-2025-966bbe91fbf0
• 2025 BYD Seal U Boost, 1.5 plug-in hybrid SUV, grey. Mileage: 4,791 miles. Price: £24,495, £295 more than this car. Dealer: Pentagon BYD Burton in Burton upon Trent. AskCar page: https://askcar.co.uk/car/byd-seal-u-2025-ca7f7505a025
• 2025 BYD Seal U Boost, 1.5 plug-in hybrid SUV, grey. Mileage: 4,836 miles. Price: £24,998, £798 more than this car. Dealer: Arnold Clark Linwood Motorstore / BYD in Linwood. AskCar page: https://askcar.co.uk/car/byd-seal-u-2025-73dc8f2e79e3

• The nearest: 2025 BYD Seal U Boost, 1.5 plug-in hybrid SUV, grey, under a mile from this car. Mileage: 3,321 miles. Price: £23,500, £700 less than this car. Dealer: Sytner Select Swindon in Swindon. AskCar page: https://askcar.co.uk/car/byd-seal-u-2025-4c3690ff48ea