2021 BMW 3 Series

2.0 320i M Sport Auto RWD Euro 6 (s/s) 4dr (181 bhp)

£20,495

Fair price: within 8% of the typical £21,107 for this model, age and mileage, drawing on 6,849 adverts of this make and model.

Overview

Make: BMW
Model: 3 Series
Trim: M SPORT
Version: 2.0 320i M Sport Auto RWD Euro 6 (s/s) 4dr (181 bhp)
Mileage: 42,410 miles
Year: 2021
Fuel type: Petrol
Body type: Saloon
Engine: 2.0 L
Gearbox: Automatic
Power: 181 bhp
Seats: 5
CO2: 146 g/km
Colour: Black
Doors: 4
Driven wheels: Rear Wheel Drive
Engine badge: 320i
Emissions standard: Euro 6

About this car

This 2021 BMW 3 Series M Sport is advertised with 42,410 miles, approximately 12,200 below the typical mileage for its age. The dealer is asking £20,495, which is £612 below our market estimate of £21,107. To estimate its market asking price, we analyse UK dealer adverts for 6,849 BMW 3 Series cars across different ages and specifications. We have tracked this advert for 6 days. MOT records show an expiry date of 28 March 2027, and the latest recorded mileage is consistent with the advert. The seller is Park's Motor Group Douglas Park BMW Hamilton, based in Hamilton.

Stock data from 21 October 2026.

How we estimate prices and check cars

Price history

First seen on 16 October 2026, 6 days ago. Advert duration calculated on 22 October 2026.

Recorded asking prices
Date observed	Asking price
16 October 2026	£20,495
21 October 2026	£20,495

Price and mileage comparison

Estimated market asking price: £21,107. The asking price is £612 below this estimate.

The estimate uses UK dealer asking prices, accounting for make, model, trim, version, age, mileage, fuel, gearbox, body type, driven wheels, engine size and power. It estimates an advertised price, not a confirmed sale price.

The pricing calculation includes 6,849 adverts of this make and model across different ages and specifications.

Advertised mileage is approximately 12,200 miles lower than typical for a 2021 BMW 3 Series.

The advertised mileage is consistent with the last MOT reading.

MOT

MOT valid until 28 March 2027. 38,670 miles at the last test.

179 other cars with the same year, trim, gearbox and fuel are for sale from £14,000 to £29,990.

Other matching cars (up to five, cheapest first)
Asking price	Mileage
£14,000	110,887 miles
£14,000	93,863 miles
£14,335	88,796 miles
£14,995	87,565 miles
£15,195	93,000 miles

These cars have covered 3,973–110,887 miles, compared with 42,410 miles for this car.

Matching year, trim, gearbox and fuel does not mean matching mileage or every specification. Our estimate adjusts for these differences using the wider market data.

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

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Dealer

Park's Motor Group Douglas Park BMW Hamilton, Hamilton. Across the dealer network: 106 branches, 2,727 cars for sale.

Dealer postcode: ML3 0AY.