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: 42,234 miles
• Fuel: Diesel, mild hybrid
• Body: Saloon, 4 doors, 5 seats
• Engine: 3.0 litres, 335 bhp
• Gearbox: Automatic
• Drive: Four-wheel drive
• Colour: Grey
• CO2: 160 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 BMW 3 Series is advertised with 42,234 miles, approximately 12,700 below the typical mileage for its age. The AskCar estimate for this car is £29,737. It is priced at £27,990, which is £1,747 below that estimate. The AskCar estimate draws on 6,742 BMW 3 Series adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. We first recorded this advert 16 days ago, and its asking price has since fallen by £1,005. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Perrys Burnley, based in Burnley. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 2 November 2026.

How we estimate prices and check cars

Price

Fair price: £1,747 (5%) under the AskCar estimate of £29,737.

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 6,742 priced BMW 3 Series adverts across different ages and specifications, as of 2 November 2026.

A 2021 BMW 3 Series with the 3.0 diesel engine is typically advertised at £29,000: the median of the 139 for sale on AskCar, as of 2 November 2026.

Time on sale

This 2021 BMW 3 Series has been on sale for at least 16 days.

Price history

AskCar first saw this advert on 17 October 2026 at £28,995. Its asking price is now £27,990, £1,005 less. The latest price cut was seen on 29 October 2026.

Price changes recorded:

• 17 October 2026: £28,995
• 27 October 2026: £27,995
• 29 October 2026: £27,990

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 21 December 2026.

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

There were no advisories at the latest test.

Mileage at that test: 33,793 miles, which matches the advertised 42,234 miles.

Advertised mileage is about 12,700 miles lower than the median mileage of a 2021 BMW 3 Series on AskCar.