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: 54,000 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

The advertised mileage for this 2021 BMW 3 Series is 54,000 miles. Its asking price of £27,750 is £187 above the AskCar estimate of £27,563. To work out the AskCar estimate, we analyse UK dealer adverts for 6,897 BMW 3 Series cars across different ages and specifications. Since we first spotted the advert 133 days ago, the asking price has dropped by £1,750. According to the government's MOT record, its advertised mileage is consistent with the latest test. It is advertised by T C & C Ltd T/A Trade Cars & Commercials in Prudhoe. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 5 November 2026.

How we estimate prices and check cars

Price

Fair price: £187 (under 1%) over the AskCar estimate of £27,563.

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 6,897 priced BMW 3 Series adverts across different ages and specifications, as of 5 November 2026.

A 2021 BMW 3 Series with the 3.0 diesel engine is typically advertised at £28,500: the median of the 144 for sale on AskCar, as of 5 November 2026.

Time on sale

This 2021 BMW 3 Series has been on sale for at least 133 days.

Price history

AskCar first saw this advert on 25 June 2026 at £29,500. Its asking price is now £27,750, £1,750 less. The latest price cut was seen on 3 November 2026.

Price changes recorded:

• 26 June 2026: £29,500
• 7 August 2026: £29,000
• 25 August 2026: £28,500
• 11 October 2026: £28,000
• 3 November 2026: £27,750

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 5 November 2026: valid until 26 March 2027.

It has had 4 MOTs. The latest, on 23 March 2026, passed.

Advisories at the latest test: rear brake pad(s) wearing thin; rear brake disc worn, but not excessively offside and nearside.

Mileage at that test: 52,756 miles, which matches the advertised 54,000 miles.

Advertised mileage is about 800 miles lower than the median mileage of a 2021 BMW 3 Series on AskCar.