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: 25,270 miles
• Fuel: Diesel, mild hybrid
• Body: Saloon, 4 doors, 5 seats
• Engine: 3.0 litres, 335 bhp
• Gearbox: Automatic
• Drive: Four-wheel drive
• Colour: Black
• CO2: 160 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 BMW 3 Series has covered 25,270 miles, around 29,900 fewer miles than is typical for its age. The dealer is asking £30,995, which is £1,593 below the AskCar estimate of £32,588. To work out the AskCar estimate, we analyse UK dealer adverts for 6,862 BMW 3 Series cars across different ages and specifications. We first recorded this advert 109 days ago, and its asking price has since fallen by £2,000. The recorded MOT expired on 27 September 2026, so ask the dealer whether it has been renewed. Its advertised mileage matches the government's MOT record. The seller is Chariots Specialist Cars Chariots BYD Kettering, based in Kettering. 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: £1,593 (4%) under the AskCar estimate of £32,588.

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 109 days.

Price history

AskCar first saw this advert on 18 July 2026 at £32,995. Its asking price is now £30,995, £2,000 less. The latest price cut was seen on 15 October 2026.

Price changes recorded:

• 18 July 2026: £32,995
• 8 August 2026: £31,495
• 15 October 2026: £30,995

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 4 November 2026: the latest record we hold ran out on 27 September 2026; ask the dealer for the current MOT.

It has had 2 MOTs. The latest, on 26 September 2025, passed.

Advisories at the latest test: rear tyre worn close to legal limit/worn on edge both.

Mileage at that test: 23,177 miles, which matches the advertised 25,270 miles.

Advertised mileage is about 29,900 miles lower than the median mileage of a 2021 BMW 3 Series on AskCar.