2021 BMW 3 Series 2.0 318i M Sport

Version: 2.0 318i M Sport Auto RWD Euro 6 (s/s) 4dr (154 bhp)

Price: £18,600. Fair price: £1,101 (5%) under the AskCar estimate of £19,701, our expected asking price for this car from its model, age, mileage and specification, drawing on 6,718 priced BMW 3 Series adverts on AskCar as of 31 October 2026.

AskCar lists 6,973 used BMW 3 Series from 2,626 UK dealerships, as of 31 October 2026.

Overview

Make
BMW
Model
3 Series
Trim
M Sport
Version
2.0 318i M Sport Auto RWD Euro 6 (s/s) 4dr (154 bhp)
Mileage
45,300 miles
Year
2021
Fuel type
Petrol
Body type
Saloon
Engine
2.0 L
Gearbox
Automatic
Power
154 bhp
Seats
5
CO2
146 g/km
Colour
White
Doors
4
Driven wheels
Rear Wheel Drive
Engine badge
318i
Emissions standard
Euro 6

About this car

This 2021 BMW 3 Series M Sport has covered 45,300 miles, around 9,700 fewer miles than is typical for its age. Priced at £18,600, it is advertised £1,101 below the AskCar estimate of £19,701. The AskCar estimate uses 6,718 UK dealer adverts for the BMW 3 Series, with adjustments for age, mileage, trim, engine and other specifications. Since we first spotted the advert 94 days ago, the asking price has dropped by £2,600. It may give you a starting point for a conversation about price. The latest MOT record shows an expiry date of 10 November 2026, with the advertised mileage consistent with the recorded reading. You can find this car at GS Car Centre in Preston.

Stock data as of 31 October 2026.

How we estimate prices and check cars

Price history

AskCar first saw this advert on 29 July 2026, 94 days ago. Price reduced by £2,600 from £21,200 since AskCar first saw it. 5 price reductions recorded, the latest seen on 31 October 2026.

Recorded asking prices
Date observedAsking price
29 July 2026£21,200
30 July 2026£21,200
20 August 2026£20,900
8 September 2026£19,900
20 September 2026£19,800
23 September 2026£18,800
31 October 2026£18,600

Price and mileage comparison

Fair price: £1,101 (5%) under the AskCar estimate of £19,701.

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 6,718 priced BMW 3 Series adverts across different ages and specifications, as of 31 October 2026.

Advertised mileage is about 9,700 miles lower 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 10 November 2026. 40,156 miles at the last test.

Other matching cars

177 other 2021 BMW 3 Series M Sport automatic petrol cars are for sale at UK dealers from £14,000 to £29,990, as of 31 October 2026.

The 5 cheapest:

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

62 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 31 October 2026, AskCar lists 583,548 cars and vans from 12,716 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.