2018 BMW M3 3.0 Competition

Overview

• Make: BMW
• Model: M3
• Trim: Competition
• Version: 3.0 Competition DCT RWD Euro 6 4dr
• Year: 2018
• Mileage: 34,159 miles
• Fuel: Petrol
• Body: Saloon, 4 doors, 5 seats
• Engine: 3.0 litres
• Gearbox: Automatic (DCT)
• Drive: Rear-wheel drive
• Colour: White
• CO2: 194 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 34,159 miles on the clock, this 2018 BMW M3 Competition has done roughly 13,800 fewer miles than a typical 2018 BMW M3. Priced at £42,500, it is advertised £1,879 above the AskCar estimate of £40,621. To work out the AskCar estimate, we analyse UK dealer adverts for 756 BMW M3 cars across different ages and specifications. We first recorded this car for sale 24 days ago. According to the government's MOT record, its advertised mileage is consistent with the latest test. You can find this car at Sytner Chigwell BMW in Loughton. 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

Fair price: £1,879 (4%) over the AskCar estimate of £40,621.

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 756 priced BMW M3 adverts across different ages and specifications, as of 2 November 2026.

A 2018 BMW M3 with the 3.0 petrol engine is typically advertised at £37,500: the median of the 26 for sale on AskCar, as of 2 November 2026.

Time on sale

This 2018 BMW M3 has been on sale for at least 24 days.

Price history

AskCar first saw this advert on 9 October 2026 at £42,500. 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 2 November 2026: valid until 29 April 2027.

It has had 7 MOTs. The latest, on 24 April 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 33,929 miles, which matches the advertised 34,159 miles.

Advertised mileage is about 13,800 miles lower than the median mileage of a 2018 BMW M3 on AskCar.

Similar cars

18 other 2018 BMW M3 Competition 3.0 petrol automatic saloons are for sale at UK dealers, from £32,495 to £49,500, as of 2 November 2026.

The 3 closest to this car in mileage:

• 2018 BMW M3 Competition, 3.0 petrol saloon, black. Mileage: 36,000 miles. Price: £42,995, £495 more than this car. Dealer: A C G Motors in Manchester. AskCar page: https://askcar.co.uk/car/bmw-m3-2018-884480b9ac4d
• 2018 BMW M3 Competition, 3.0 petrol saloon, blue. Mileage: 36,178 miles. Price: £36,995, £5,505 less than this car. Dealer: EAG Specialist Cars in St Neots. AskCar page: https://askcar.co.uk/car/bmw-m3-2018-d48118d22abb
• 2018 BMW M3 Competition, 3.0 petrol saloon, grey. Mileage: 27,652 miles. Price: £39,860, £2,640 less than this car. Dealer: Oakdene Collection in Alfreton. AskCar page: https://askcar.co.uk/car/bmw-m3-2018-a4e09a054557

• The nearest: 2018 BMW M3 Competition, 3.0 petrol saloon, blue, 18 miles from this car. Mileage: 57,000 miles. Price: £38,495, £4,005 less than this car. Dealer: Carderi Motors in Wembley. AskCar page: https://askcar.co.uk/car/bmw-m3-2018-c7aa6f9716ed