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: 50,784 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 has covered 50,784 miles, around 4,400 fewer miles than is typical for its age. The dealer is asking £27,700, which is £312 below the AskCar estimate of £28,012. To work out the AskCar estimate, we analyse UK dealer adverts for 6,886 BMW 3 Series cars across different ages and specifications. We first recorded this advert 53 days ago, and its asking price has since fallen by £800. Its advertised mileage matches the government's MOT record. It is advertised by Redgate Lodge in Newcastle Upon Tyne. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 7 November 2026.

How we estimate prices and check cars

Price

Fair price: £312 (1%) under the AskCar estimate of £28,012.

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 6,886 priced BMW 3 Series adverts across different ages and specifications, as of 7 November 2026.

A 2021 BMW 3 Series with the 3.0 diesel engine is typically advertised at £28,300: the median of the 148 for sale on AskCar, as of 7 November 2026.

Time on sale

This 2021 BMW 3 Series has been on sale for at least 53 days.

Price history

AskCar first saw this advert on 15 September 2026 at £28,500. Its asking price is now £27,700, £800 less. The latest price cut was seen on 6 November 2026.

Price changes recorded:

• 15 September 2026: £28,500
• 23 September 2026: £29,000
• 16 October 2026: £28,500
• 24 October 2026: £28,000
• 31 October 2026: £27,800
• 6 November 2026: £27,700

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 7 November 2026: valid until 10 December 2026.

It has had 3 MOTs. The latest, on 1 December 2025, passed.

There were no advisories at the latest test.

Mileage at that test: 48,754 miles, which matches the advertised 50,784 miles.

Advertised mileage is about 4,400 miles lower than the median mileage of a 2021 BMW 3 Series on AskCar.