2021 BMW 3 Series 3.0 M340i MHT

Overview

• Make: BMW
• Model: 3 Series
• Version: 3.0 M340i MHT Auto 4WD Euro 6 (s/s) 4dr (369 bhp)
• Year: 2021
• Mileage: 55,663 miles
• Fuel: Petrol, mild hybrid
• Body: Saloon, 4 doors, 5 seats
• Engine: 3.0 litres, 369 bhp
• Gearbox: Automatic
• Drive: Four-wheel drive
• Colour: Grey
• CO2: 176 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 BMW 3 Series has covered 55,663 miles. Its asking price of £28,488 is £1,231 below the AskCar estimate of £29,719. To work out the AskCar estimate, we analyse UK dealer adverts for 6,886 BMW 3 Series cars across different ages and specifications. The asking price is now £1,000 lower than when we first recorded the advert 53 days ago. We checked its advertised mileage against the government's MOT record, and they match. It is advertised by Junction 17 Cars Peterborough in Yaxley. 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: £1,231 (4%) under the AskCar estimate of £29,719.

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 petrol 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 £29,488. Its asking price is now £28,488, £1,000 less. The latest price cut was seen on 23 October 2026.

Price changes recorded:

• 15 September 2026: £29,488
• 23 October 2026: £28,488

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 7 November 2026: valid until 27 June 2027.

It has had 3 MOTs. The latest, on 1 June 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 52,975 miles, which matches the advertised 55,663 miles.

Advertised mileage is about 500 miles higher than the median mileage of a 2021 BMW 3 Series on AskCar.