2021 BMW M3 3.0 BiTurbo Competition

Overview

• Make: BMW
• Model: M3
• Trim: Competition
• Version: 3.0 BiTurbo Competition Steptronic 4WD Euro 6 (s/s) 4dr M (503 bhp)
• Year: 2021
• Mileage: 31,000 miles
• Fuel: Petrol
• Body: Saloon, 4 doors, 5 seats
• Engine: 3.0 litres, 503 bhp
• Gearbox: Automatic (Steptronic)
• Drive: Four-wheel drive
• Colour: Grey
• CO2: 229 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 31,000 miles, this 2021 BMW M3 Competition has covered about 4,100 more miles than other 2021 BMW M3 cars. The dealer is asking £56,950, which is £1,477 below the AskCar estimate of £58,427. 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 16 days ago. Its advertised mileage matches the government's MOT record. The seller is Carbon Collection, based in Sheffield. 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: £1,477 (2%) under the AskCar estimate of £58,427.

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 16 days.

Price history

AskCar first saw this advert on 17 October 2026 at £56,950. 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 3 August 2027.

It has had 3 MOTs. The latest, on 28 July 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 29,083 miles, which matches the advertised 31,000 miles.

Advertised mileage is about 4,100 miles higher 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: 31,243 miles. Price: £59,990, £3,040 more than this car. Dealer: SS Automotive Cars Sheffield in Sheffield. AskCar page: https://askcar.co.uk/car/bmw-m3-2021-c1e053d9425b
• 2021 BMW M3 Competition, 3.0 petrol saloon, grey. Mileage: 32,463 miles. Price: £50,980, £5,970 less than this car. Dealer: Phantom Motor Company in Hindley Green. AskCar page: https://askcar.co.uk/car/bmw-m3-2021-12d9768d50dd
• 2021 BMW M3 Competition, 3.0 petrol saloon, grey. Mileage: 33,201 miles. Price: £52,995, £3,955 less than this car. Dealer: Park's Motor Group Douglas Park BMW Hamilton in Hamilton. AskCar page: https://askcar.co.uk/car/bmw-m3-2021-051f78c4e9bf