2021 BMW X3 3.0 30d MHT M Sport

Overview

• Make: BMW
• Model: X3
• Trim: M Sport
• Version: 3.0 30d MHT M Sport Auto 4WD Euro 6 (s/s) 5dr (282 bhp)
• Year: 2021
• Mileage: 23,953 miles
• Fuel: Diesel, mild hybrid
• Body: SUV, 5 doors, 5 seats
• Engine: 3.0 litres, 282 bhp
• Gearbox: Automatic
• Drive: Four-wheel drive
• Colour: Black
• CO2: 164 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 BMW X3 M Sport has covered 23,953 miles. Its asking price of £35,900 is £2,983 above the AskCar estimate of £32,917. The AskCar estimate uses 3,076 UK dealer adverts for the BMW X3, with adjustments for age, mileage, trim, engine and other specifications. We first saw this car advertised 20 days ago. Its asking price has since fallen by £600. Ask the dealer why the advert shows fewer miles than the 29,361 recorded at the latest MOT. Its MOT is recorded as valid until 25 September 2027. The seller is Sytner Select Swindon, based in Swindon. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 5 November 2026.

How we estimate prices and check cars

Price

Above the going rate: £2,983 (9%) over the AskCar estimate of £32,917.

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 3,076 priced BMW X3 adverts across different ages and specifications, as of 5 November 2026.

A 2021 BMW X3 with the 3.0 diesel engine is typically advertised at £32,400: the median of the 42 for sale on AskCar, as of 5 November 2026.

Time on sale

This 2021 BMW X3 has been on sale for at least 20 days.

Price history

AskCar first saw this advert on 16 October 2026 at £36,500. Its asking price is now £35,900, £600 less. The latest price cut was seen on 30 October 2026.

Price changes recorded:

• 16 October 2026: £36,500
• 30 October 2026: £35,900

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 5 November 2026: valid until 25 September 2027.

It has had 3 MOTs. The latest, on 26 September 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 29,361 miles. The advert says 23,953 miles, fewer than the MOT record, so ask the dealer which is right.

Advertised mileage is about 24,900 miles lower than the median mileage of a 2021 BMW X3 on AskCar.

Similar cars

14 other 2021 BMW X3 M Sport 3.0 diesel automatic SUVs are for sale at UK dealers, from £20,450 to £32,780, as of 5 November 2026.

The 3 closest to this car in mileage:

• 2021 BMW X3 M Sport, 3.0 diesel SUV, black. Mileage: 21,146 miles. Price: £29,349, £6,551 less than this car. Dealer: LSH Auto Mercedes-Benz of Stockport in Stockport. AskCar page: https://askcar.co.uk/car/bmw-x3-2021-89337d58a583
• 2021 BMW X3 M Sport, 3.0 diesel SUV, grey. Mileage: 30,595 miles. Price: £31,499, £4,401 less than this car. Dealer: Williams Bolton Bmw in Bolton. AskCar page: https://askcar.co.uk/car/bmw-x3-2021-ec9e207438de
• 2021 BMW X3 M Sport, 3.0 diesel SUV, black. Mileage: 31,209 miles. Price: £30,995, £4,905 less than this car. Dealer: Ballyrobert Mallusk in Belfast. AskCar page: https://askcar.co.uk/car/bmw-x3-2021-9f445228bfa2

• The nearest: 2021 BMW X3 M Sport, 3.0 diesel SUV, silver, 28 miles from this car. Mileage: 41,202 miles. Price: £29,950, £5,950 less than this car. Dealer: Cotswold Bmw Cheltenham in Cheltenham. AskCar page: https://askcar.co.uk/car/bmw-x3-2021-1991f5e8ff52