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: 53,500 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

This 2021 BMW 3 Series is advertised with 53,500 miles on the clock. Its asking price of £27,295 is £387 below the AskCar estimate of £27,682. The AskCar estimate uses 6,862 UK dealer adverts for the BMW 3 Series, with adjustments for age, mileage, trim, engine and other specifications. We have tracked this advert for 19 days. According to the government's MOT record, its advertised mileage is consistent with the latest test. It is advertised by RDB Car Sales in Burntisland. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 4 November 2026.

How we estimate prices and check cars

Price

Fair price: £387 (1%) under the AskCar estimate of £27,682.

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 6,862 priced BMW 3 Series adverts across different ages and specifications, as of 4 November 2026.

A 2021 BMW 3 Series with the 3.0 diesel engine is typically advertised at £28,500: the median of the 142 for sale on AskCar, as of 4 November 2026.

Time on sale

This 2021 BMW 3 Series has been on sale for at least 19 days.

Price history

AskCar first saw this advert on 16 October 2026 at £27,295. 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 4 November 2026: valid until 2 June 2027.

It failed its MOT on 2 June 2026 (offside front tyre has a bulge, caused by separation or partial failure of its structure) and passed 1 day later, on 3 June 2026.

Advisories at the latest test: child seat fitted not allowing full inspection of adult belt.

Mileage at that test: 50,938 miles, which matches the advertised 53,500 miles.

Advertised mileage is about 1,700 miles lower than the median mileage of a 2021 BMW 3 Series on AskCar.