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: 43,422 miles
• Fuel: Diesel, mild hybrid
• Body: Saloon, 4 doors, 5 seats
• Engine: 3.0 litres, 335 bhp
• Gearbox: Automatic
• Drive: Four-wheel drive
• Colour: Grey
• CO2: 160 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 43,422 miles on the clock, this 2021 BMW 3 Series has done roughly 11,400 fewer miles than a typical 2021 BMW 3 Series. Its asking price of £27,980 is £1,218 below the AskCar estimate of £29,198. The AskCar estimate uses 6,822 UK dealer adverts for the BMW 3 Series, with adjustments for age, mileage, trim, engine and other specifications. This car was first seen in our listings data 4 days ago. The recorded MOT expired on 22 October 2026, so ask the dealer whether it has been renewed. We checked its advertised mileage against the government's MOT record, and they match. The seller is Stratstone BMW Bury St Edmunds, based in Bury St Edmunds. 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: £1,218 (4%) under the AskCar estimate of £29,198.

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

AskCar first saw this 2021 BMW 3 Series advertised 4 days ago. About half of 2021 BMW 3 Series cars are gone from sale within a month of being advertised: 436 of the 927 first advertised between 10 July 2026 and 5 October 2026.

Price history

AskCar first saw this advert on 4 November 2026 at £27,980. Its asking price has not changed.

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 8 November 2026: the latest record we hold ran out on 22 October 2026; ask the dealer for the current MOT.

It has had 2 MOTs. The latest, on 17 October 2025, passed.

Advisories at the latest test: central front oil leak, but not excessive engine; nearside rear outer tyre slightly damaged sidewall.

Mileage at that test: 36,493 miles, which matches the advertised 43,422 miles.

Advertised mileage is about 11,400 miles lower than the median mileage of a 2021 BMW 3 Series on AskCar.