2018 BMW 3 Series 3.0 335d M Sport

Overview

• Make: BMW
• Model: 3 Series
• Trim: M Sport
• Version: 3.0 335d M Sport Auto 4WD Euro 6 (s/s) 4dr (309 bhp)
• Year: 2018
• Mileage: 42,529 miles
• Fuel: Diesel
• Body: Saloon, 4 doors, 5 seats
• Engine: 3.0 litres, 309 bhp
• Gearbox: Automatic
• Drive: Four-wheel drive
• Colour: Blue
• CO2: 145 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 42,529 miles, this 2018 BMW 3 Series M Sport has covered about 30,400 fewer miles than other 2018 BMW 3 Series cars. Its asking price of £17,800 is £1,860 below the AskCar estimate of £19,660. To work out the AskCar estimate, we analyse UK dealer adverts for 6,742 BMW 3 Series cars across different ages and specifications. The dealer may accept less: this car has been on sale for at least 128 days, and its asking price has been cut by £2,450. According to the government's MOT record, its advertised mileage is consistent with the latest test. It is for sale at Car Planet Watford in Rickmansworth. 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

Good value: £1,860 (9%) under the AskCar estimate of £19,660.

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 6,742 priced BMW 3 Series adverts across different ages and specifications, as of 2 November 2026.

A 2018 BMW 3 Series with the 3.0 diesel engine is typically advertised at £18,000: the median of the 66 for sale on AskCar, as of 2 November 2026.

Time on sale

The dealer may accept less. This 2018 BMW 3 Series has been on sale for at least 128 days, and its asking price has been cut by £2,450. About half of 2018 BMW 3 Series cars are gone from sale within a month of being advertised: 257 of the 506 first advertised between 10 July 2026 and 29 September 2026.

Price history

AskCar first saw this advert on 27 June 2026 at £20,250. Its asking price is now £17,800, £2,450 less. The latest price cut was seen on 30 October 2026.

Price changes recorded:

• 27 June 2026: £20,250
• 18 July 2026: £20,450
• 24 July 2026: £20,400
• 30 July 2026: £20,350
• 5 August 2026: £20,050
• 11 August 2026: £20,100
• 18 August 2026: £19,850
• 25 August 2026: £19,950
• 1 September 2026: £19,900
• 10 September 2026: £19,950
• 16 September 2026: £19,850
• 22 September 2026: £19,550
• 28 September 2026: £19,250
• 4 October 2026: £18,950
• 9 October 2026: £18,650
• 17 October 2026: £18,350
• 23 October 2026: £18,100
• 30 October 2026: £17,800

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 5 July 2027.

It failed its MOT on 6 July 2026 (offside front headlamp aim too low) and passed later the same day.

There were no advisories at the latest test.

Mileage at that test: 42,978 miles, which matches the advertised 42,529 miles.

Advertised mileage is about 30,400 miles lower than the median mileage of a 2018 BMW 3 Series on AskCar.

Similar cars

11 other 2018 BMW 3 Series M Sport 3.0 diesel automatic saloons are for sale at UK dealers, from £10,990 to £23,840, as of 2 November 2026.

The 3 closest to this car in mileage:

• 2018 BMW 3 Series M Sport, 3.0 diesel saloon, blue. Mileage: 46,943 miles. Price: £18,990, £1,190 more than this car. Dealer: Brownroyd Motors in Heywood. AskCar page: https://askcar.co.uk/car/bmw-3-series-2018-b609d813017a
• 2018 BMW 3 Series M Sport, 3.0 diesel saloon, blue. Mileage: 47,712 miles. Price: £19,000, £1,200 more than this car. Dealer: Sytner Warwick BMW in Warwick. AskCar page: https://askcar.co.uk/car/bmw-3-series-2018-4f40b53520be
• 2018 BMW 3 Series M Sport, 3.0 diesel saloon, white. Mileage: 35,965 miles. Price: £18,650, £850 more than this car. Dealer: Group 1 Ipswich BMW in Ipswich. AskCar page: https://askcar.co.uk/car/bmw-3-series-2018-3e9cb2973f08

• The nearest: 2018 BMW 3 Series M Sport, 3.0 diesel saloon, black, 6 miles from this car. Mileage: 62,500 miles. Price: £16,250, £1,550 less than this car. Dealer: Dash Autos in Harrow. AskCar page: https://askcar.co.uk/car/bmw-3-series-2018-d848c38615ba