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: 95,000 miles
• Fuel: Diesel, mild hybrid
• Body: Saloon, 4 doors, 5 seats
• Engine: 3.0 litres, 335 bhp
• Gearbox: Automatic
• Drive: Four-wheel drive
• Colour: Blue
• CO2: 160 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 BMW 3 Series has covered 95,000 miles, around 40,200 more miles than is typical for its age. The dealer is asking £21,950, which is £1,746 above the AskCar estimate of £20,204. To work out the AskCar estimate, we analyse UK dealer adverts for 6,822 BMW 3 Series cars across different ages and specifications. We first saw this car advertised 135 days ago. Its asking price has since fallen by £1,040. According to the government's MOT record, its advertised mileage is consistent with the latest test. It is for sale at Billington Motor Group in Burnley. 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

Above the going rate: £1,746 (8%) over the AskCar estimate of £20,204.

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 135 days.

Price history

AskCar first saw this advert on 26 June 2026 at £22,990. Its asking price is now £21,950, £1,040 less. The latest price cut was seen on 24 October 2026.

Price changes recorded:

• 26 June 2026: £22,990
• 16 October 2026: £22,490
• 24 October 2026: £21,950

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 8 November 2026: valid until 2 January 2027.

It has had 3 MOTs. The latest, on 22 December 2025, passed.

There were no advisories at the latest test.

Mileage at that test: 76,932 miles, which matches the advertised 95,000 miles.

Advertised mileage is about 40,200 miles higher than the median mileage of a 2021 BMW 3 Series on AskCar.