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) (335 bhp)
• Year: 2021
• Mileage: 61,012 miles
• Fuel: Diesel, mild hybrid
• Body: 5 seats
• Engine: 3.0 litres, 335 bhp
• Gearbox: Automatic
• Drive: Four-wheel drive
• Colour: Blue
• CO2: 165 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 61,012 miles, this 2021 BMW 3 Series has covered about 6,200 more miles than other 2021 BMW 3 Series cars. Its asking price of £31,500 is £1,999 above the AskCar estimate of £29,501. The AskCar estimate draws on 6,822 BMW 3 Series adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. We first recorded this advert 59 days ago, and its asking price has since fallen by £2,500. Its advertised mileage matches the government's MOT record. The seller is Sytner High Wycombe BMW, based in High Wycombe. 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: £1,999 (6%) over the AskCar estimate of £29,501.

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 59 days.

Price history

AskCar first saw this advert on 10 September 2026 at £34,000. Its asking price is now £31,500, £2,500 less. The latest price cut was seen on 3 November 2026.

Price changes recorded:

• 10 September 2026: £34,000
• 6 October 2026: £33,500
• 13 October 2026: £32,500
• 27 October 2026: £32,000
• 3 November 2026: £31,500

Mileage and MOT

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

It failed its MOT on 31 July 2026 (nearside front tyre has ply or cords exposed) and passed later the same day.

There were no advisories at the latest test.

Mileage at that test: 59,166 miles, which matches the advertised 61,012 miles.

Advertised mileage is about 6,200 miles higher than the median mileage of a 2021 BMW 3 Series on AskCar.