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: 20,000 miles
• Fuel: Petrol
• Body: Saloon, 4 doors, 5 seats
• Engine: 3.0 litres, 503 bhp
• Gearbox: Automatic (Steptronic)
• Colour: Grey
• CO2: 229 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 BMW M3 Competition is advertised with 20,000 miles, approximately 6,900 below the typical mileage for its age. Priced at £49,995, it is advertised £6,294 below the AskCar estimate of £56,289. To work out the AskCar estimate, we analyse UK dealer adverts for 756 BMW M3 cars across different ages and specifications. This car was first seen in our listings data 29 days ago. We checked its advertised mileage against the government's MOT record, and they match. You can find this car at S & S Car Sales in Ky62sy. 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: £6,294 (11%) under the AskCar estimate of £56,289.

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 29 days.

Price history

AskCar first saw this advert on 4 October 2026 at £49,995. 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 December 2026.

It has had 2 MOTs. The latest, on 4 December 2025, passed.

There were no advisories at the latest test.

Mileage at that test: 16,095 miles, which matches the advertised 20,000 miles.

Advertised mileage is about 6,900 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, blue. Mileage: 21,469 miles. Price: £52,000, £2,005 more than this car. Dealer: White Rose Automotive in Barnsley. AskCar page: https://askcar.co.uk/car/bmw-m3-2021-e6d1382f0676
• 2021 BMW M3 Competition, 3.0 petrol saloon, white. Mileage: 18,500 miles. Price: £48,950, £1,045 less than this car. Dealer: Westside Cars in Wednesbury. AskCar page: https://askcar.co.uk/car/bmw-m3-2021-6127bf3650b7
• 2021 BMW M3 Competition, 3.0 petrol saloon, blue. Mileage: 21,784 miles. Price: £49,995, the same price as this car. Dealer: Prestige and Performance Cars Wakefield in Wakefield. AskCar page: https://askcar.co.uk/car/bmw-m3-2021-63075a385b76

• The nearest: 2021 BMW M3 Competition, 3.0 petrol saloon, grey, 43 miles from this car. Mileage: 33,201 miles. Price: £52,995, £3,000 more 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