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: 15,816 miles
• Fuel: Petrol
• Body: Saloon, 4 doors, 5 seats
• Engine: 3.0 litres, 503 bhp
• Gearbox: Automatic (Steptronic)
• Colour: Black
• CO2: 230 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 15,816 miles, this 2021 BMW M3 Competition has covered about 11,100 fewer miles than other 2021 BMW M3 cars. Its asking price of £57,590 is £129 above the AskCar estimate of £57,461. The AskCar estimate uses UK dealer asking prices, including 756 BMW M3 adverts, and accounts for the car’s age, mileage and specification. Since we first spotted the advert 47 days ago, the asking price has dropped by £1,900. Its advertised mileage matches the government's MOT record. The seller is Stratstone BMW Tunbridge Wells, based in Tunbridge Wells. 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: £129 (under 1%) over the AskCar estimate of £57,461.

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 47 days.

Price history

AskCar first saw this advert on 16 September 2026 at £59,490. Its asking price is now £57,590, £1,900 less. The latest price cut was seen on 27 October 2026.

Price changes recorded:

• 16 September 2026: £59,490
• 17 September 2026: £58,990
• 24 September 2026: £57,895
• 15 October 2026: £58,490
• 16 October 2026: £58,290
• 25 October 2026: £57,895
• 27 October 2026: £57,590

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 September 2027.

It has had 3 MOTs. The latest, on 27 August 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 15,734 miles, which matches the advertised 15,816 miles.

Advertised mileage is about 11,100 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, black. Mileage: 16,000 miles. Price: £56,995, £595 less than this car. Dealer: Waterways Prestige in Leighton Buzzard. AskCar page: https://askcar.co.uk/car/bmw-m3-2021-a730496dd9e8
• 2021 BMW M3 Competition, 3.0 petrol saloon, grey. Mileage: 15,000 miles. Price: £52,700, £4,890 less than this car. Dealer: Hitchfields in Huddersfield. AskCar page: https://askcar.co.uk/car/bmw-m3-2021-067f2fae6c1c
• 2021 BMW M3 Competition, 3.0 petrol saloon, grey. Mileage: 17,981 miles. Price: £58,300, £710 more than this car. Dealer: John Clark BMW Aberdeen in Aberdeen. AskCar page: https://askcar.co.uk/car/bmw-m3-2021-b96af864bcef

• The nearest: 2021 BMW M3 Competition, 3.0 petrol saloon, grey, 34 miles from this car. Mileage: 4,000 miles. Price: £69,950, £12,360 more than this car. Dealer: Signature Car Group in Rochford. AskCar page: https://askcar.co.uk/car/bmw-m3-2021-9e87c45863cb