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: 48,000 miles
• Fuel: Diesel, mild hybrid
• Body: Saloon, 4 doors, 5 seats
• Engine: 3.0 litres, 335 bhp
• Gearbox: Automatic
• Drive: Four-wheel drive
• Colour: Black
• CO2: 160 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 48,000 miles on the clock, this 2021 BMW 3 Series has done roughly 6,600 fewer miles than a typical 2021 BMW 3 Series. Its asking price of £28,495 is £124 above the AskCar estimate of £28,371. The AskCar estimate uses 6,814 UK dealer adverts for the BMW 3 Series, with adjustments for age, mileage, trim, engine and other specifications. Since we first spotted the advert 6 days ago, the asking price has dropped by £1,000. We checked its advertised mileage against the government's MOT record, and they match. The seller is TM Autos, based in Maidstone. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 9 November 2026.

How we estimate prices and check cars

Price

Fair price: £124 (under 1%) over the AskCar estimate of £28,371.

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 6,814 priced BMW 3 Series adverts across different ages and specifications, as of 9 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 9 November 2026.

Time on sale

AskCar first saw this 2021 BMW 3 Series advertised 6 days ago. About half of 2021 BMW 3 Series cars are gone from sale within a month of being advertised: 442 of the 945 first advertised between 10 July 2026 and 6 October 2026.

Price history

AskCar first saw this advert on 3 November 2026 at £29,495. Its asking price is now £28,495, £1,000 less. The latest price cut was seen on 8 November 2026.

Price changes recorded:

• 3 November 2026: £29,495
• 7 November 2026: £28,995
• 8 November 2026: £28,495

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 9 November 2026: valid until 7 June 2027.

It has had 3 MOTs. The latest, on 8 June 2026, passed.

Advisories at the latest test: oil leak, but not excessive engine area.

Mileage at that test: 46,959 miles, which matches the advertised 48,000 miles.

Advertised mileage is about 6,600 miles lower than the median mileage of a 2021 BMW 3 Series on AskCar.