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: 3,321 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 has covered 3,321 miles, around 4,800 fewer miles than is typical for its age. Its asking price of £23,500 is £1,563 below the AskCar estimate of £25,063. The AskCar estimate draws on 853 BYD Seal U adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. We first saw this car advertised 43 days ago. Its asking price has since fallen by £1,000. The seller is Sytner Select Swindon, based in Swindon. 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: £1,563 (6%) under the AskCar estimate of £25,063.

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 2025 BYD Seal U with the 1.5 plug-in hybrid engine is typically advertised at £24,600: the median of the 497 for sale on AskCar, as of 4 November 2026.

Time on sale

This 2025 BYD Seal U has been on sale for at least 43 days.

Price history

AskCar first saw this advert on 22 September 2026 at £24,500. Its asking price is now £23,500, £1,000 less. The latest price cut was seen on 23 October 2026.

Price changes recorded:

• 22 September 2026: £24,500
• 15 October 2026: £23,900
• 23 October 2026: £23,500

Mileage and MOT

MOT: first test not yet due.

Advertised mileage is about 4,800 miles lower than the median mileage of a 2025 BYD Seal U on AskCar.

Similar cars

102 other 2025 BYD Seal U Boost 1.5 plug-in hybrid automatic SUVs are for sale at UK dealers, from £22,440 to £33,995, as of 4 November 2026.

The 3 closest to this car in mileage:

• 2025 BYD Seal U Boost, 1.5 plug-in hybrid SUV, grey. Mileage: 3,682 miles. Price: £23,690, £190 more than this car. Dealer: Snows BYD Newbury in Newbury. AskCar page: https://askcar.co.uk/car/byd-seal-u-2025-f384aec6057c
• 2025 BYD Seal U Boost, 1.5 plug-in hybrid SUV, grey. Mileage: 3,745 miles. Price: £23,599, £99 more than this car. Dealer: D. M. Keith BYD Hull in Kingston upon Hull. AskCar page: https://askcar.co.uk/car/byd-seal-u-2025-2878bc989733
• 2025 BYD Seal U Boost, 1.5 plug-in hybrid SUV, white. Mileage: 2,620 miles. Price: £24,934, £1,434 more than this car. Dealer: D M Keith Byd Keighley in Keighley. AskCar page: https://askcar.co.uk/car/byd-seal-u-2025-9f3ec9ca68db

• The nearest: 2025 BYD Seal U Boost, 1.5 plug-in hybrid SUV, grey, under a mile from this car. Mileage: 4,802 miles. Price: £24,200, £700 more than this car. Dealer: Marshall BYD Swindon in Swindon. AskCar page: https://askcar.co.uk/car/byd-seal-u-2025-70ce624ae04e