2021 BMW X3 3.0 M40d MHT M Sport

Overview

• Make: BMW
• Model: X3
• Trim: M Sport
• Version: 3.0 M40d MHT M Sport Auto 4WD Euro 6 (s/s) 5dr (335 bhp)
• Year: 2021
• Mileage: 31,209 miles
• Fuel: Diesel, mild hybrid
• Body: SUV, 5 doors, 5 seats
• Engine: 3.0 litres, 335 bhp
• Gearbox: Automatic
• Drive: Four-wheel drive
• Colour: Black
• CO2: 184 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 BMW X3 M Sport is advertised with 31,209 miles, approximately 17,700 below the typical mileage for its age. The AskCar estimate for this car is £33,043. It is priced at £30,995, which is £2,048 below that estimate. The AskCar estimate draws on 3,034 BMW X3 adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. We first recorded this advert 160 days ago, and its asking price has since fallen by £2,000. Our records show an MOT expiry date of 27 July 2026, which has passed. Ask the dealer for an update. According to the government's MOT record, its advertised mileage is consistent with the latest test. It is advertised by Ballyrobert Mallusk in Newtownabbey. 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

Fair price: £2,048 (6%) under the AskCar estimate of £33,043.

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 3,034 priced BMW X3 adverts across different ages and specifications, as of 4 November 2026.

A 2021 BMW X3 with the 3.0 diesel engine is typically advertised at £32,800: the median of the 41 for sale on AskCar, as of 4 November 2026.

Time on sale

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

Price history

AskCar first saw this advert on 28 May 2026 at £32,995. Its asking price is now £30,995, £2,000 less. The latest price cut was seen on 6 October 2026.

Price changes recorded:

• 28 May 2026: £32,995
• 6 June 2026: £32,750
• 2 July 2026: £32,495
• 5 August 2026: £31,995
• 5 September 2026: £31,495
• 6 October 2026: £30,995

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 4 November 2026: the latest record we hold ran out on 27 July 2026; ask the dealer for the current MOT.

It has had 2 MOTs. The latest, on 26 July 2025, passed.

There were no advisories at the latest test.

Mileage at that test: 28,235 miles, which matches the advertised 31,209 miles.

Advertised mileage is about 17,700 miles lower than the median mileage of a 2021 BMW X3 on AskCar.

Similar cars

13 other 2021 BMW X3 M Sport 3.0 diesel automatic SUVs are for sale at UK dealers, from £20,450 to £35,900, as of 4 November 2026.

The 3 closest to this car in mileage:

• 2021 BMW X3 M Sport, 3.0 diesel SUV, blue. Mileage: 32,656 miles. Price: £26,750, £4,245 less than this car. Dealer: Cotswold Group Select in Tewkesbury. AskCar page: https://askcar.co.uk/car/bmw-x3-2021-c4667419414f
• 2021 BMW X3 M Sport, 3.0 diesel SUV, black. Mileage: 23,953 miles. Price: £35,900, £4,905 more than this car. Dealer: Sytner Select Swindon in Swindon. AskCar page: https://askcar.co.uk/car/bmw-x3-2021-21d922754054
• 2021 BMW X3 M Sport, 3.0 diesel SUV, silver. Mileage: 41,202 miles. Price: £29,950, £1,045 less than this car. Dealer: Cotswold Bmw Cheltenham in Cheltenham. AskCar page: https://askcar.co.uk/car/bmw-x3-2021-1991f5e8ff52

• The nearest: 2021 BMW X3 M Sport, 3.0 diesel SUV, white, 149 miles from this car. Mileage: 82,200 miles. Price: £25,500, £5,495 less than this car. Dealer: GS Car Centre in Preston. AskCar page: https://askcar.co.uk/car/bmw-x3-2021-2b5c5c41b007