2021 BMW X4 3.0 M40i

Overview

• Make: BMW
• Model: X4
• Version: 3.0 M40i Auto 4WD Euro 6 (s/s) 5dr (355 bhp)
• Year: 2021
• Mileage: 46,903 miles
• Fuel: Petrol
• Body: SUV, 5 doors, 5 seats
• Engine: 3.0 litres, 355 bhp
• Gearbox: Automatic
• Drive: Four-wheel drive
• Colour: Grey
• CO2: 203 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 BMW X4 has covered 46,903 miles. The AskCar estimate for this car is £31,747. It is priced at £30,970, which is £777 below that estimate. The AskCar estimate uses UK dealer asking prices, including 657 BMW X4 adverts, and accounts for the car’s age, mileage and specification. We first saw this car advertised 24 days ago. Its asking price has since fallen by £1,030. The government's MOT record matches its advertised mileage. It is advertised by Sytner Harold Wood BMW in Romford. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 6 November 2026.

How we estimate prices and check cars

Price

Fair price: £777 (2%) under the AskCar estimate of £31,747.

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 657 priced BMW X4 adverts across different ages and specifications, as of 6 November 2026.

A 2021 BMW X4 with the 3.0 petrol engine is typically advertised at £28,500: the median of the 18 for sale on AskCar, as of 6 November 2026.

Time on sale

This 2021 BMW X4 has been on sale for at least 24 days.

Price history

AskCar first saw this advert on 13 October 2026 at £32,000. Its asking price is now £30,970, £1,030 less. The latest price cut was seen on 1 November 2026.

Price changes recorded:

• 13 October 2026: £32,000
• 20 October 2026: £31,500
• 1 November 2026: £30,970

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 6 November 2026: valid until 29 January 2027.

It has had 4 MOTs. The latest, on 5 January 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 42,120 miles, which matches the advertised 46,903 miles.

Advertised mileage is about 1,500 miles lower than the median mileage of a 2021 BMW X4 on AskCar.