2021 BMW 3 Series 3.0 M340d MHT

Overview

• Make: BMW
• Model: 3 Series
• Version: 3.0 M340d MHT Auto 4WD Euro 6 (s/s) 4dr (335 bhp)
• Year: 2021
• Mileage: 54,500 miles
• Fuel: Diesel, mild hybrid
• Body: Saloon, 4 doors, 5 seats
• Engine: 3.0 litres, 335 bhp
• Gearbox: Automatic
• Drive: Four-wheel drive
• Colour: Blue
• CO2: 160 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

The advertised mileage for this 2021 BMW 3 Series is 54,500 miles. Priced at £26,489, it is advertised £842 below the AskCar estimate of £27,331. The AskCar estimate uses UK dealer asking prices, including 6,822 BMW 3 Series adverts, and accounts for the car’s age, mileage and specification. We first saw this car advertised 164 days ago. Its asking price has since fallen by £2,500. We checked its advertised mileage against the government's MOT record, and they match. The seller is A6 Motors, based in Bedford. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 8 November 2026.

How we estimate prices and check cars

Price

Fair price: £842 (3%) under the AskCar estimate of £27,331.

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 6,822 priced BMW 3 Series adverts across different ages and specifications, as of 8 November 2026.

A 2021 BMW 3 Series with the 3.0 diesel engine is typically advertised at £28,400: the median of the 146 for sale on AskCar, as of 8 November 2026.

Time on sale

This 2021 BMW 3 Series has been on sale for at least 164 days.

Price history

AskCar first saw this advert on 28 May 2026 at £28,989. Its asking price is now £26,489, £2,500 less. The latest price cut was seen on 20 October 2026.

Price changes recorded:

• 28 May 2026: £28,989
• 4 August 2026: £27,989
• 26 August 2026: £27,489
• 2 October 2026: £26,989
• 20 October 2026: £26,489

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 8 November 2026: valid until 25 June 2027.

It has had 4 MOTs. The latest, on 26 June 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 54,694 miles, which matches the advertised 54,500 miles.

Advertised mileage is about 300 miles lower than the median mileage of a 2021 BMW 3 Series on AskCar.