2018 BMW X3 3.0 30d M Sport

Overview

• Make: BMW
• Model: X3
• Trim: M Sport
• Version: 3.0 30d M Sport Auto 4WD Euro 6 (s/s) 5dr (261 bhp)
• Year: 2018
• Mileage: 6,802 miles
• Fuel: Diesel
• Body: SUV, 5 doors, 5 seats
• Engine: 3.0 litres, 261 bhp
• Gearbox: Automatic
• Drive: Four-wheel drive
• Colour: Black
• CO2: 157 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2018 BMW X3 M Sport has covered 6,802 miles, around 58,100 fewer miles than is typical for its age. The dealer is asking £29,450, which is £348 below the AskCar estimate of £29,798. To work out the AskCar estimate, we analyse UK dealer adverts for 3,034 BMW X3 cars across different ages and specifications. Since we first spotted the advert 32 days ago, the asking price has dropped by £1,500. Its advertised mileage matches the government's MOT record. The seller is Sytner Maidenhead BMW, based in Maidenhead. 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: £348 (1%) under the AskCar estimate of £29,798.

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 2018 BMW X3 with the 3.0 diesel engine is typically advertised at £22,000: the median of the 64 for sale on AskCar, as of 4 November 2026.

Time on sale

This 2018 BMW X3 has been on sale for at least 32 days.

Price history

AskCar first saw this advert on 3 October 2026 at £30,950. Its asking price is now £29,450, £1,500 less. The latest price cut was seen on 4 November 2026.

Price changes recorded:

• 3 October 2026: £30,950
• 15 October 2026: £30,450
• 24 October 2026: £29,950
• 4 November 2026: £29,450

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 4 November 2026: valid until 23 March 2027.

It has had 5 MOTs. The latest, on 24 March 2026, passed.

Advisories at the latest test: undertray fitted.

Mileage at that test: 6,454 miles, which matches the advertised 6,802 miles.

Advertised mileage is about 58,100 miles lower than the median mileage of a 2018 BMW X3 on AskCar.

Similar cars

43 other 2018 BMW X3 M Sport 3.0 diesel automatic SUVs are for sale at UK dealers, from £17,495 to £27,850, as of 4 November 2026.

The 3 closest to this car in mileage:

• 2018 BMW X3 M Sport, 3.0 diesel SUV, blue. Mileage: 26,595 miles. Price: £22,900, £6,550 less than this car. Dealer: Car Planet Watford in Watford. AskCar page: https://askcar.co.uk/car/bmw-x3-2018-be619765d43f
• 2018 BMW X3 M Sport, 3.0 diesel SUV, blue. Mileage: 31,414 miles. Price: £22,500, £6,950 less than this car. Dealer: Carbase Weston-super-Mare in Weston-super-Mare. AskCar page: https://askcar.co.uk/car/bmw-x3-2018-b2dfe91bb5ca
• 2018 BMW X3 M Sport, 3.0 diesel SUV, white. Mileage: 31,813 miles. Price: £27,850, £1,600 less than this car. Dealer: Sandal BMW Wakefield in Wakefield. AskCar page: https://askcar.co.uk/car/bmw-x3-2018-a5d573df7ab1