2021 BMW M3 3.0 BiTurbo Competition

Overview

• Make: BMW
• Model: M3
• Trim: Competition
• Version: 3.0 BiTurbo Competition Steptronic Euro 6 (s/s) 4dr (503 bhp)
• Year: 2021
• Mileage: 4,000 miles
• Fuel: Petrol
• Body: Saloon, 4 doors, 5 seats
• Engine: 3.0 litres, 503 bhp
• Gearbox: Automatic (Steptronic)
• Colour: Grey
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 4,000 miles, this 2021 BMW M3 Competition has covered about 22,900 fewer miles than other 2021 BMW M3 cars. The dealer is asking £69,950, which is £7,682 above the AskCar estimate of £62,268. To work out the AskCar estimate, we analyse UK dealer adverts for 756 BMW M3 cars across different ages and specifications. We have tracked this advert for 158 days. You can find this car at Signature Car Group in Rochford. 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

Above the going rate: £7,682 (12%) over the AskCar estimate of £62,268.

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 2021 BMW M3 with the 3.0 petrol engine is typically advertised at £53,500: the median of the 42 for sale on AskCar, as of 2 November 2026.

Time on sale

This 2021 BMW M3 has been on sale for at least 158 days.

Price history

AskCar first saw this advert on 28 May 2026 at £69,950. Its asking price has not changed.

Mileage and MOT

Advertised mileage is about 22,900 miles lower than the median mileage of a 2021 BMW M3 on AskCar.

Similar cars

37 other 2021 BMW M3 Competition 3.0 petrol automatic saloons are for sale at UK dealers, from £42,989 to £78,999, as of 2 November 2026.

The 3 closest to this car in mileage:

• 2021 BMW M3 Competition, 3.0 petrol saloon, green. Mileage: 5,000 miles. Price: £77,450, £7,500 more than this car. Dealer: Digbeth Motor Sales in Birmingham. AskCar page: https://askcar.co.uk/car/bmw-m3-2021-306110aa649a
• 2021 BMW M3 Competition, 3.0 petrol saloon, yellow. Mileage: 2,800 miles. Price: £74,950, £5,000 more than this car. Dealer: Digbeth Motor Sales in Birmingham. AskCar page: https://askcar.co.uk/car/bmw-m3-2021-d623a2eaaaa6
• 2021 BMW M3 Competition, 3.0 petrol saloon, blue. Mileage: 5,621 miles. Price: £65,249, £4,701 less than this car. Dealer: 101 Specialist Cars in Manchester. AskCar page: https://askcar.co.uk/car/bmw-m3-2021-cfa9bc773dac

• The nearest: 2021 BMW M3 Competition, 3.0 petrol saloon, black, 34 miles from this car. Mileage: 15,816 miles. Price: £57,590, £12,360 less than this car. Dealer: Stratstone BMW Tunbridge Wells in Royal Tunbridge Wells. AskCar page: https://askcar.co.uk/car/bmw-m3-2021-4f233d6e980c