2018 BMW 4 Series 2.0 420i M Sport

Overview

• Make: BMW
• Model: 4 Series
• Trim: M Sport
• Version: 2.0 420i M Sport Auto RWD Euro 6 (s/s) 2dr (181 bhp)
• Year: 2018
• Mileage: 38,310 miles
• Fuel: Petrol
• Body: Convertible, 2 doors, 4 seats
• Engine: 2.0 litres, 181 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: Blue
• CO2: 144 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2018 BMW 4 Series M Sport has covered 38,310 miles, around 24,700 fewer miles than is typical for its age. Priced at £16,950, it is advertised £112 below the AskCar estimate of £17,062. The AskCar estimate uses 1,814 UK dealer adverts for the BMW 4 Series, with adjustments for age, mileage, trim, engine and other specifications. We first recorded this car for sale 42 days ago. According to the government's MOT record, its advertised mileage is consistent with the latest test. It is for sale at Anchor Cars in Padworth. 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: £112 (under 1%) under the AskCar estimate of £17,062.

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 1,814 priced BMW 4 Series adverts across different ages and specifications, as of 4 November 2026.

A 2018 BMW 4 Series with the 2.0 petrol engine is typically advertised at £14,500: the median of the 112 for sale on AskCar, as of 4 November 2026.

Time on sale

This 2018 BMW 4 Series has been on sale for at least 42 days.

Price history

AskCar first saw this advert on 23 September 2026 at £16,950. Its asking price has not changed.

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 4 November 2026: valid until 21 September 2027.

It has had 9 MOTs. The latest, on 22 September 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 38,312 miles, which matches the advertised 38,310 miles.

Advertised mileage is about 24,700 miles lower than the median mileage of a 2018 BMW 4 Series on AskCar.

Similar cars

12 other 2018 BMW 4 Series M Sport 2.0 petrol automatic convertibles are for sale at UK dealers, from £14,489 to £23,995, as of 4 November 2026.

The 3 closest to this car in mileage:

• 2018 BMW 4 Series M Sport, 2.0 petrol convertible, white. Mileage: 37,585 miles. Price: £18,000, £1,050 more than this car. Dealer: The Motoring Centre in Royal Leamington Spa. AskCar page: https://askcar.co.uk/car/bmw-4-series-2018-36368f184487
• 2018 BMW 4 Series M Sport, 2.0 petrol convertible, white. Mileage: 44,000 miles. Price: £14,489, £2,461 less than this car. Dealer: Berengrave Services in Gillingham. AskCar page: https://askcar.co.uk/car/bmw-4-series-2018-42092cdb1ca8
• 2018 BMW 4 Series M Sport, 2.0 petrol convertible, black. Mileage: 31,349 miles. Price: £15,760, £1,190 less than this car. Dealer: Evans Halshaw Hyundai Milton Keynes in Milton Keynes. AskCar page: https://askcar.co.uk/car/bmw-4-series-2018-be535ca78988

• The nearest: 2018 BMW 4 Series M Sport, 2.0 petrol convertible, white, 28 miles from this car. Mileage: 66,207 miles. Price: £14,995, £1,955 less than this car. Dealer: ARJ Motors in Addlestone. AskCar page: https://askcar.co.uk/car/bmw-4-series-2018-97304c10d21d