2021 BMW X3 M 3.0 Competition

Overview

• Make: BMW
• Model: X3 M
• Trim: Competition
• Version: 3.0 i Competition Auto 4WD Euro 6 (s/s) 5dr (503 bhp)
• Year: 2021
• Mileage: 23,000 miles
• Fuel: Petrol
• Body: SUV, 5 doors, 5 seats
• Engine: 3.0 litres, 503 bhp
• Gearbox: Automatic
• Drive: Four-wheel drive
• Colour: Grey
• CO2: 262 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 BMW X3 M Competition is advertised with 23,000 miles, approximately 11,000 below the typical mileage for its age. The AskCar estimate for this car is £50,602. It is priced at £45,995, which is £4,607 below that estimate. To work out the AskCar estimate, we analyse UK dealer adverts for 128 BMW X3 M cars across different ages and specifications. We first recorded this advert 160 days ago, and its asking price has since fallen by £2,893. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Caledonia Vehicle Solutions, based in AYR. 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

Good value: £4,607 (9%) under the AskCar estimate of £50,602.

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 128 priced BMW X3 M adverts across different ages and specifications, as of 4 November 2026.

A 2021 BMW X3 M with the 3.0 petrol engine is typically advertised at £46,700: the median of the 24 for sale on AskCar, as of 4 November 2026.

Time on sale

This 2021 BMW X3 M has been on sale for at least 160 days.

Price history

AskCar first saw this advert on 28 May 2026 at £48,888. Its asking price is now £45,995, £2,893 less. The latest price cut was seen on 4 October 2026.

Price changes recorded:

• 29 May 2026: £48,888
• 23 August 2026: £47,888
• 10 September 2026: £46,995
• 4 October 2026: £45,995

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 4 November 2026: valid until 15 April 2027.

It has had 3 MOTs. The latest, on 6 April 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 22,881 miles, which matches the advertised 23,000 miles.

Advertised mileage is about 11,000 miles lower than the median mileage of a 2021 BMW X3 M on AskCar.

Similar cars

20 other 2021 BMW X3 M Competition 3.0 petrol automatic SUVs are for sale at UK dealers, from £39,995 to £54,995, as of 4 November 2026.

The 3 closest to this car in mileage:

• 2021 BMW X3 M Competition, 3.0 petrol SUV, blue. Mileage: 24,000 miles. Price: £52,989, £6,994 more than this car. Dealer: J.L.A.N Motor Group in Birmingham. AskCar page: https://askcar.co.uk/car/bmw-x3-m-2021-11b67be7742a
• 2021 BMW X3 M Competition, 3.0 petrol SUV, grey. Mileage: 24,800 miles. Price: £54,995, £9,000 more than this car. Dealer: Eminent Motor Group in Oldham. AskCar page: https://askcar.co.uk/car/bmw-x3-m-2021-9b607e2890bc
• 2021 BMW X3 M Competition, 3.0 petrol SUV, blue. Mileage: 27,651 miles. Price: £47,499, £1,504 more than this car. Dealer: Prestige Car Supermarket in York. AskCar page: https://askcar.co.uk/car/bmw-x3-m-2021-c990f786ac52

• The nearest: 2021 BMW X3 M Competition, 3.0 petrol SUV, grey, 36 miles from this car. Mileage: 43,979 miles. Price: £42,060, £3,935 less than this car. Dealer: Evans Halshaw Ford Coatbridge in Coatbridge. AskCar page: https://askcar.co.uk/car/bmw-x3-m-2021-419ac1562d89