2021 BMW 3 Series 3.0 M340i MHT

Version: 3.0 M340i MHT Auto 4WD Euro 6 (s/s) 4dr (369 bhp)

Price: £28,475. Fair price: £450 (1%) under the AskCar estimate of £28,925, our expected asking price for this car from its model, age, mileage and specification, drawing on 6,692 priced BMW 3 Series adverts on AskCar as of 29 October 2026.

AskCar lists 7,078 used BMW 3 Series from 2,699 UK dealerships, as of 29 October 2026.

Overview

Make
BMW
Model
3 Series
Version
3.0 M340i MHT Auto 4WD Euro 6 (s/s) 4dr (369 bhp)
Mileage
62,147 miles
Year
2021
Fuel type
Petrol
Body type
Saloon
Engine
3.0 L
Gearbox
Automatic
Power
369 bhp
Seats
5
CO2
176 g/km
Colour
Grey
Doors
4
Driven wheels
Four Wheel Drive
Engine badge
M340i; MHT
Hybrid type
Mild hybrid
Emissions standard
Euro 6

About this car

With 62,147 miles on the clock, this 2021 BMW 3 Series has done roughly 7,500 more miles than a typical 2021 BMW 3 Series. Priced at £28,475, it is advertised £450 below the AskCar estimate of £28,925. The AskCar estimate uses UK dealer asking prices, including 6,692 BMW 3 Series adverts, and accounts for the car’s age, mileage and specification. We first saw this car advertised 37 days ago. Its asking price has since fallen by £1,500. MOT records show an expiry date of 6 July 2027, and the latest recorded mileage is consistent with the advert. The seller is Junction 17 Cars Limited t/a Junction 17 Cars (Grantham), based in Grantham.

Stock data as of 29 October 2026.

How we estimate prices and check cars

Price history

AskCar first saw this advert on 22 September 2026, 37 days ago. Price reduced by £1,500 from £29,975 since AskCar first saw it. 1 price reduction recorded, the latest seen on 29 October 2026.

Recorded asking prices
Date observedAsking price
22 September 2026£29,975
29 October 2026£28,475

Price and mileage comparison

Fair price: £450 (1%) under the AskCar estimate of £28,925.

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 6,692 priced BMW 3 Series adverts across different ages and specifications, as of 29 October 2026.

Advertised mileage is about 7,500 miles higher than the median mileage of a 2021 BMW 3 Series on AskCar.

The advertised mileage is consistent with the last MOT reading.

MOT

MOT: valid until 6 July 2027. 61,532 miles at the last test.

Other matching cars

58 other 2021 BMW 3 Series automatic petrol cars are for sale at UK dealers from £22,000 to £45,000, as of 29 October 2026.

The 5 cheapest:

The 58 matching cars have covered 6,593 to 89,162 miles, compared with 62,147 miles for this car.

Matching year, trim, gearbox and fuel does not mean matching mileage or every specification. The AskCar estimate adjusts for these differences.

Browse all BMW 3 Series cars for sale · 2021 BMW 3 Series price guide

More like this

Photos

16 photos of this car are on its AskCar page.

How to contact the dealer and its opening hours are on this AskCar page.

As of 29 October 2026, AskCar lists 587,923 cars and vans from 12,992 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.