2021 BMW M3 3.0 BiTurbo Competition

Overview

• Make: BMW
• Model: M3
• Trim: Competition
• Version: 3.0 BiTurbo Competition Steptronic RWD Euro 6 (s/s) 4dr (503 bhp)
• Year: 2021
• Mileage: 79,965 miles
• Fuel: Petrol
• Body: Saloon, 4 doors, 5 seats
• Engine: 3.0 litres, 503 bhp
• Gearbox: Automatic (Steptronic)
• Drive: Rear-wheel drive
• Colour: Grey
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 79,965 miles on the clock, this 2021 BMW M3 Competition has done roughly 54,000 more miles than a typical 2021 BMW M3. Priced at £42,989, it is advertised £4,615 above the AskCar estimate of £38,374. To work out the AskCar estimate, we analyse UK dealer adverts for 752 BMW M3 cars across different ages and specifications. It first appeared in our advert records 126 days ago. You can find this car at MNM Cars in Preston. 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

Above the going rate: £4,615 (12%) over the AskCar estimate of £38,374.

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 752 priced BMW M3 adverts across different ages and specifications, as of 4 November 2026.

A 2021 BMW M3 with the 3.0 petrol engine is typically advertised at £54,000: the median of the 43 for sale on AskCar, as of 4 November 2026.

Time on sale

This 2021 BMW M3 has been on sale for at least 126 days.

Price history

AskCar first saw this advert on 1 July 2026 at £42,989. Its asking price has not changed.

Mileage and MOT

Advertised mileage is about 54,000 miles higher than the median mileage of a 2021 BMW M3 on AskCar.

Similar cars

38 other 2021 BMW M3 Competition 3.0 petrol automatic saloons are for sale at UK dealers, from £44,995 to £78,999, as of 4 November 2026.

The 3 closest to this car in mileage:

• 2021 BMW M3 Competition, 3.0 petrol saloon, red. Mileage: 52,400 miles. Price: £48,995, £6,006 more than this car. Dealer: Yorkshire Vehicle Solutions in York. AskCar page: https://askcar.co.uk/car/bmw-m3-2021-43542f865fdd
• 2021 BMW M3 Competition, 3.0 petrol saloon, green. Mileage: 52,250 miles. Price: £49,995, £7,006 more than this car. Dealer: Adrenaline Collective in Leamington Spa. AskCar page: https://askcar.co.uk/car/bmw-m3-2021-ff2a84d69357
• 2021 BMW M3 Competition, 3.0 petrol saloon, blue. Mileage: 49,274 miles. Price: £49,995, £7,006 more than this car. Dealer: Silsoe Prestige Motors in Luton. AskCar page: https://askcar.co.uk/car/bmw-m3-2021-c5b629d2ac64

• The nearest: 2021 BMW M3 Competition, 3.0 petrol saloon, grey, 13 miles from this car. Mileage: 24,535 miles. Price: £54,295, £11,306 more than this car. Dealer: MotorClass Premium Vehicles in Wigan. AskCar page: https://askcar.co.uk/car/bmw-m3-2021-4855976b59f3