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: 50,000 miles
• Fuel: Petrol
• Body: SUV, 5 doors, 5 seats
• Engine: 3.0 litres, 503 bhp
• Gearbox: Automatic
• Drive: Four-wheel drive
• Colour: Blue
• CO2: 247 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 BMW X3 M Competition is advertised with 50,000 miles, approximately 14,500 above the typical mileage for its age. Its asking price of £48,650 is £4,476 above the AskCar estimate of £44,174. The AskCar estimate draws on 129 BMW X3 M adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. It first appeared in our advert records 1 day ago. Its advertised mileage matches the government's MOT record. It is advertised by West Coast Motors in West Kilbride. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 8 November 2026.

How we estimate prices and check cars

Price

Above the going rate: £4,476 (10%) over the AskCar estimate of £44,174.

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 129 priced BMW X3 M adverts across different ages and specifications, as of 8 November 2026.

A 2021 BMW X3 M with the 3.0 petrol engine is typically advertised at £46,200: the median of the 26 for sale on AskCar, as of 8 November 2026.

Time on sale

AskCar first saw this 2021 BMW X3 M advertised 1 day ago.

Price history

AskCar first saw this advert on 7 November 2026 at £48,650. 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 8 November 2026: valid until 19 January 2027.

It has had 2 MOTs. The latest, on 20 January 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 43,866 miles, which matches the advertised 50,000 miles.

Advertised mileage is about 14,500 miles higher than the median mileage of a 2021 BMW X3 M on AskCar.

Similar cars

23 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 8 November 2026.

The 3 closest to this car in mileage:

• 2021 BMW X3 M Competition, 3.0 petrol SUV, black. Mileage: 52,000 miles. Price: £52,488, £3,838 more than this car. Dealer: Auto Group in Wembley. AskCar page: https://askcar.co.uk/car/bmw-x3-m-2021-b7782500a611
• 2021 BMW X3 M Competition, 3.0 petrol SUV, grey. Mileage: 47,113 miles. Price: £47,500, £1,150 less than this car. Dealer: John Clark BMW Aberdeen in Aberdeen. AskCar page: https://askcar.co.uk/car/bmw-x3-m-2021-1b3cbf678608
• 2021 BMW X3 M Competition, 3.0 petrol SUV, black. Mileage: 53,000 miles. Price: £43,495, £5,155 less than this car. Dealer: Sharman Group in Manchester. AskCar page: https://askcar.co.uk/car/bmw-x3-m-2021-303d31bae200

• The nearest: 2021 BMW X3 M Competition, 3.0 petrol SUV, grey, 18 miles from this car. Mileage: 23,000 miles. Price: £45,995, £2,655 less than this car. Dealer: Caledonia Vehicle Solutions in Ayr. AskCar page: https://askcar.co.uk/car/bmw-x3-m-2021-c899b1adf5c0