2021 BMW 3 Series 2.0 318i M Sport
Version: 2.0 318i M Sport Auto RWD Euro 6 (s/s) 5dr Touring (154 bhp)
Price: £20,999. Fair price: £538 (2%) over the AskCar estimate of £20,461, our expected asking price for this car from its model, age, mileage and specification, drawing on 6,706 priced BMW 3 Series adverts on AskCar as of 30 October 2026.
AskCar lists 6,987 used BMW 3 Series from 2,629 UK dealerships, as of 30 October 2026.
Overview
- Make
- BMW
- Model
- 3 Series
- Trim
- M Sport
- Version
- 2.0 318i M Sport Auto RWD Euro 6 (s/s) 5dr Touring (154 bhp)
- Mileage
- 46,311 miles
- Year
- 2021
- Fuel type
- Petrol
- Body type
- Estate
- Engine
- 2.0 L
- Gearbox
- Automatic
- Power
- 154 bhp
- Seats
- 5
- CO2
- 153 g/km
- Colour
- Grey
- Doors
- 5
- Driven wheels
- Rear Wheel Drive
- Engine badge
- 318i
- Emissions standard
- Euro 6
About this car
This 2021 BMW 3 Series M Sport is advertised with 46,311 miles, approximately 8,400 below the typical mileage for its age. Its asking price of £20,999 is £538 above the AskCar estimate of £20,461. The AskCar estimate draws on 6,706 BMW 3 Series adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. We have tracked this advert today. Its recorded MOT is valid until 14 July 2027, and its advertised mileage is consistent with the latest MOT reading. The seller is Halliwell Jones Wilmslow BMW, based in Wilmslow.
Stock data as of 30 October 2026.
Price history
AskCar first saw this advert on 30 October 2026.
| Date observed | Asking price |
|---|---|
| 30 October 2026 | £20,999 |
Price and mileage comparison
Fair price: £538 (2%) over the AskCar estimate of £20,461.
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 6,706 priced BMW 3 Series adverts across different ages and specifications, as of 30 October 2026.
Advertised mileage is about 8,400 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 14 July 2027. 43,803 miles at the last test.
Other matching cars
172 other 2021 BMW 3 Series M Sport automatic petrol cars are for sale at UK dealers from £14,000 to £29,990, as of 30 October 2026.
The 5 cheapest:
- 2021 BMW 3 Series. Price: £14,000. Mileage: 110,887 miles. Dealer: Seaton Car Sales in Hartlepool. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-4b8b9bf56042
- 2021 BMW 3 Series. Price: £14,000. Mileage: 93,863 miles. Dealer: Junction Autopark - Winsford in Winsford. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-645c5bc96690
- 2021 BMW 3 Series. Price: £14,335. Mileage: 88,796 miles. Dealer: Carbase Lympsham in Lympsham. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-7990e9d432ea
- 2021 BMW 3 Series. Price: £14,495. Mileage: 93,000 miles. Dealer: Lodge Car Sales in Wednesbury. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-fc1b991ce243
- 2021 BMW 3 Series. Price: £14,995. Mileage: 87,565 miles. Dealer: Cardiff Trade Sales in Cardiff. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-702837a69868
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
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Photos
1 photo of this car is on its AskCar page.
How to contact the dealer and its opening hours are on this AskCar page.
As of 30 October 2026, AskCar lists 580,490 cars and vans from 12,695 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.