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: 16,000 miles
• Fuel: Petrol
• Body: Saloon, 4 doors, 5 seats
• Engine: 3.0 litres, 503 bhp
• Gearbox: Automatic (Steptronic)
• Drive: Four-wheel drive
• Colour: Black
• CO2: 229 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 BMW M3 Competition is advertised with 16,000 miles, approximately 10,900 below the typical mileage for its age. The dealer is asking £56,995, which is £5,979 below the AskCar estimate of £62,974. To work out the AskCar estimate, we analyse UK dealer adverts for 756 BMW M3 cars across different ages and specifications. Since we first spotted the advert 155 days ago, the asking price has dropped by £5,004. The latest recorded MOT expiry date is 31 August 2026, which has passed. Confirm its status with the dealer. Its advertised mileage matches the government's MOT record. It is for sale at Waterways Prestige in Leighton Buzzard. 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

Good value: £5,979 (9%) under the AskCar estimate of £62,974.

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 155 days.

Price history

AskCar first saw this advert on 31 May 2026 at £61,999. Its asking price is now £56,995, £5,004 less. The latest price cut was seen on 7 October 2026.

Price changes recorded:

• 1 June 2026: £61,999
• 19 June 2026: £59,999
• 5 August 2026: £58,995
• 29 August 2026: £58,495
• 12 September 2026: £57,995
• 7 October 2026: £56,995

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: the latest record we hold ran out on 31 August 2026; ask the dealer for the current MOT.

It has had 2 MOTs. The latest, on 22 August 2025, passed.

There were no advisories at the latest test.

Mileage at that test: 10,690 miles, which matches the advertised 16,000 miles.

Advertised mileage is about 10,900 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, black. Mileage: 15,816 miles. Price: £57,590, £595 more than this car. Dealer: Stratstone BMW Tunbridge Wells in Royal Tunbridge Wells. AskCar page: https://askcar.co.uk/car/bmw-m3-2021-4f233d6e980c
• 2021 BMW M3 Competition, 3.0 petrol saloon, grey. Mileage: 15,000 miles. Price: £52,700, £4,295 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, £1,305 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, blue, 8 miles from this car. Mileage: 49,274 miles. Price: £49,995, £7,000 less than this car. Dealer: Silsoe Prestige Motors in Luton. AskCar page: https://askcar.co.uk/car/bmw-m3-2021-c5b629d2ac64