2020 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: 2020
• Mileage: 79,000 miles
• Fuel: Petrol
• Body: SUV, 5 doors, 5 seats
• Engine: 3.0 litres, 503 bhp
• Gearbox: Automatic
• Drive: Four-wheel drive
• Colour: Grey
• CO2: 239 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 79,000 miles, this 2020 BMW X3 M Competition has covered about 27,900 more miles than other 2020 BMW X3 M cars. The dealer is asking £34,999, which is £729 above the AskCar estimate of £34,270. To work out the AskCar estimate, we analyse UK dealer adverts for 130 BMW X3 M cars across different ages and specifications. We first saw this car advertised 120 days ago. Its asking price has since fallen by £996. You can find this car at Waterways Prestige in Leighton Buzzard. 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

Fair price: £729 (2%) over the AskCar estimate of £34,270.

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

A 2020 BMW X3 M with the 3.0 petrol engine is typically advertised at £39,500: the median of the 16 for sale on AskCar, as of 5 November 2026.

Time on sale

This 2020 BMW X3 M has been on sale for at least 120 days.

Price history

AskCar first saw this advert on 8 July 2026 at £35,995. Its asking price is now £34,999, £996 less. The latest price cut was seen on 2 October 2026.

Price changes recorded:

• 9 July 2026: £35,995
• 2 October 2026: £34,999

Mileage and MOT

Advertised mileage is about 27,900 miles higher than the median mileage of a 2020 BMW X3 M on AskCar.

Similar cars

13 other 2020 BMW X3 M Competition 3.0 petrol automatic SUVs are for sale at UK dealers, from £31,995 to £44,990, as of 5 November 2026.

The 3 closest to this car in mileage:

• 2020 BMW X3 M Competition, 3.0 petrol SUV, black. Mileage: 83,230 miles. Price: £37,995, £2,996 more than this car. Dealer: Macphersons & Sons in Fulmer. AskCar page: https://askcar.co.uk/car/bmw-x3-m-2020-b7eef1de0cd1
• 2020 BMW X3 M Competition, 3.0 petrol SUV, black. Mileage: 86,000 miles. Price: £31,995, £3,004 less than this car. Dealer: Apex Performance Cars in Huddersfield. AskCar page: https://askcar.co.uk/car/bmw-x3-m-2020-4532b19016f8
• 2020 BMW X3 M Competition, 3.0 petrol SUV, grey. Mileage: 67,900 miles. Price: £36,990, £1,991 more than this car. Dealer: Monaco Motorsports in Bolton. AskCar page: https://askcar.co.uk/car/bmw-x3-m-2020-9296fc00599e