2018 BMW 4 Series 3.0 430d M Sport

Overview

• Make: BMW
• Model: 4 Series
• Trim: M Sport
• Version: 3.0 430d M Sport Auto RWD Euro 6 (s/s) 2dr (254 bhp)
• Year: 2018
• Mileage: 48,143 miles
• Fuel: Diesel
• Body: Convertible, 2 doors, 4 seats
• Engine: 3.0 litres, 254 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: Red
• CO2: 144 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2018 BMW 4 Series M Sport is advertised with 48,143 miles, approximately 14,300 below the typical mileage for its age. Priced at £17,495, it is advertised £115 below the AskCar estimate of £17,610. The AskCar estimate draws on 1,833 BMW 4 Series adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. Since we first spotted the advert 37 days ago, the asking price has dropped by £500. We checked its advertised mileage against the government's MOT record, and they match. The seller is SG Petch Richmond, based in Richmond. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 5 November 2026.

How we estimate prices and check cars

Price

Fair price: £115 (under 1%) under the AskCar estimate of £17,610.

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 1,833 priced BMW 4 Series adverts across different ages and specifications, as of 5 November 2026.

A 2018 BMW 4 Series with the 3.0 diesel engine is typically advertised at £17,500: the median of the 84 for sale on AskCar, as of 5 November 2026.

Time on sale

This 2018 BMW 4 Series has been on sale for at least 37 days.

Price history

AskCar first saw this advert on 29 September 2026 at £17,995. Its asking price is now £17,495, £500 less. The latest price cut was seen on 16 October 2026.

Price changes recorded:

• 29 September 2026: £17,995
• 16 October 2026: £17,495

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 5 November 2026: valid until 4 February 2027.

It failed its MOT on 3 February 2026 (offside rear tyre has ply or cords exposed) and passed later the same day.

There were no advisories at the latest test.

Mileage at that test: 47,452 miles, which matches the advertised 48,143 miles.

Advertised mileage is about 14,300 miles lower than the median mileage of a 2018 BMW 4 Series on AskCar.

Similar cars

19 other 2018 BMW 4 Series M Sport 3.0 diesel automatic convertibles are for sale at UK dealers, from £12,795 to £20,100, as of 5 November 2026.

The 3 closest to this car in mileage:

• 2018 BMW 4 Series M Sport, 3.0 diesel convertible, grey. Mileage: 47,132 miles. Price: £17,570, £75 more than this car. Dealer: Evans Halshaw BYD Shrewsbury in Shrewsbury. AskCar page: https://askcar.co.uk/car/bmw-4-series-2018-9e89a4930126
• 2018 BMW 4 Series M Sport, 3.0 diesel convertible, grey. Mileage: 52,000 miles. Price: £18,880, £1,385 more than this car. Dealer: Albury Motor Co in Guildford. AskCar page: https://askcar.co.uk/car/bmw-4-series-2018-f64408d3fab4
• 2018 BMW 4 Series M Sport, 3.0 diesel convertible, white. Mileage: 43,935 miles. Price: £19,990, £2,495 more than this car. Dealer: Fox's Motor Co in Oundle. AskCar page: https://askcar.co.uk/car/bmw-4-series-2018-55c338323dfd

• The nearest: 2018 BMW 4 Series M Sport, 3.0 diesel convertible, blue, 54 miles from this car. Mileage: 70,000 miles. Price: £14,995, £2,500 less than this car. Dealer: Moss Prestige in Huddersfield. AskCar page: https://askcar.co.uk/car/bmw-4-series-2018-cfe3b6a5c5f7