2021 BMW 3 Series 2.0 320d MHT M Sport

Version: 2.0 320d MHT M Sport Auto RWD Euro 6 (s/s) 4dr (187 bhp)

Price: £21,000. Fair price: £191 (under 1%) under the AskCar estimate of £21,191, our expected asking price for this car from its model, age, mileage and specification, drawing on 6,652 priced BMW 3 Series adverts on AskCar as of 1 November 2026.

AskCar lists 6,914 used BMW 3 Series from 2,613 UK dealerships, as of 1 November 2026.

Overview

Make
BMW
Model
3 Series
Trim
M Sport
Version
2.0 320d MHT M Sport Auto RWD Euro 6 (s/s) 4dr (187 bhp)
Mileage
57,347 miles
Year
2021
Fuel type
Diesel
Body type
Saloon
Engine
2.0 L
Gearbox
Automatic
Power
187 bhp
Seats
5
CO2
129 g/km
Colour
Grey
Doors
4
Driven wheels
Rear Wheel Drive
Engine badge
320d; MHT
Hybrid type
Mild hybrid
Emissions standard
Euro 6

About this car

This 2021 BMW 3 Series M Sport is advertised with 57,347 miles, approximately 2,400 above the typical mileage for its age. The dealer is asking £21,000, which is £191 below the AskCar estimate of £21,191. To work out the AskCar estimate, we analyse UK dealer adverts for 6,652 BMW 3 Series cars across different ages and specifications. This car was first seen in our listings data today. Its recorded MOT is valid until 29 June 2027, and its advertised mileage is consistent with the latest MOT reading. The seller is Sytner Cardiff BMW, based in Cardiff.

Stock data as of 1 November 2026.

How we estimate prices and check cars

Price history

AskCar first saw this advert on 1 November 2026.

Recorded asking prices
Date observedAsking price
1 November 2026£21,000

Price and mileage comparison

Fair price: £191 (under 1%) under the AskCar estimate of £21,191.

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 6,652 priced BMW 3 Series adverts across different ages and specifications, as of 1 November 2026.

Advertised mileage is about 2,400 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 29 June 2027. 53,627 miles at the last test.

Other matching cars

106 other 2021 BMW 3 Series M Sport automatic diesel cars are for sale at UK dealers from £13,500 to £28,995, as of 1 November 2026.

The 5 cheapest:

The 106 matching cars have covered 15,500 to 131,041 miles, compared with 57,347 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

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

As of 1 November 2026, AskCar lists 578,994 cars and vans from 12,654 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.