2018 BMW 4 Series Gran Coupe 2.0 420i M Sport

Overview

• Make: BMW
• Model: 4 Series Gran Coupe
• Trim: M Sport
• Version: 2.0 420i M Sport Auto 4WD Euro 6 (s/s) 5dr (181 bhp)
• Year: 2018
• Mileage: 43,785 miles
• Fuel: Petrol
• Body: Hatchback, 5 doors, 5 seats
• Engine: 2.0 litres, 181 bhp
• Gearbox: Automatic
• Drive: Four-wheel drive
• Colour: Black
• CO2: 144 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 43,785 miles on the clock, this 2018 BMW 4 Series Gran Coupe M Sport has done roughly 29,500 fewer miles than a typical 2018 BMW 4 Series Gran Coupe. The dealer is asking £16,490, which is £992 below the AskCar estimate of £17,482. To work out the AskCar estimate, we analyse UK dealer adverts for 1,183 BMW 4 Series Gran Coupe cars across different ages and specifications. Since we first spotted the advert 96 days ago, the asking price has dropped by £360. We checked its advertised mileage against the government's MOT record, and they match. It is for sale at County Specialist Vehicles in Taunton. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 6 November 2026.

How we estimate prices and check cars

Price

Fair price: £992 (5%) under the AskCar estimate of £17,482.

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 1,183 priced BMW 4 Series Gran Coupe adverts across different ages and specifications, as of 6 November 2026.

A 2018 BMW 4 Series Gran Coupe with the 2.0 petrol engine is typically advertised at £13,400: the median of the 124 for sale on AskCar, as of 6 November 2026.

Time on sale

This 2018 BMW 4 Series Gran Coupe has been on sale for at least 96 days.

Price history

AskCar first saw this advert on 2 August 2026 at £16,850. Its asking price is now £16,490, £360 less. The latest price cut was seen on 16 September 2026.

Price changes recorded:

• 2 August 2026: £16,850
• 16 September 2026: £16,490

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 6 November 2026: valid until 1 October 2027.

It failed its MOT on 18 September 2026 (nearside headlamp aim projected beam image is obviously incorrect) and passed 14 days later, on 2 October 2026.

There were no advisories at the latest test.

Mileage at that test: 43,771 miles, which matches the advertised 43,785 miles.

Advertised mileage is about 29,500 miles lower than the median mileage of a 2018 BMW 4 Series Gran Coupe on AskCar.

Similar cars

36 other 2018 BMW 4 Series Gran Coupe M Sport 2.0 petrol automatic hatchbacks are for sale at UK dealers, from £8,795 to £17,995, as of 6 November 2026.

The 3 closest to this car in mileage:

• 2018 BMW 4 Series Gran Coupe M Sport, 2.0 petrol hatchback, black. Mileage: 43,069 miles. Price: £17,115, £625 more than this car. Dealer: Hippo Motor Group Peterborough in Peterborough. AskCar page: https://askcar.co.uk/car/bmw-4-series-gran-coupe-2018-ff0e866c69da
• 2018 BMW 4 Series Gran Coupe M Sport, 2.0 petrol hatchback, white. Mileage: 44,993 miles. Price: £16,440, £50 less than this car. Dealer: Dace Motor Company - Trading Standards Approved in Stockport. AskCar page: https://askcar.co.uk/car/bmw-4-series-gran-coupe-2018-3d29c407b5e4
• 2018 BMW 4 Series Gran Coupe M Sport, 2.0 petrol hatchback, white. Mileage: 40,930 miles. Price: £17,995, £1,505 more than this car. Dealer: Cars Spot in Ilford. AskCar page: https://askcar.co.uk/car/bmw-4-series-gran-coupe-2018-0f0776e4ae4f

• The nearest: 2018 BMW 4 Series Gran Coupe M Sport, 2.0 petrol hatchback, blue, 29 miles from this car. Mileage: 32,572 miles. Price: £15,991, £499 less than this car. Dealer: Cars of Penarth Road in Cardiff. AskCar page: https://askcar.co.uk/car/bmw-4-series-gran-coupe-2018-a633a30bb0bf