2021 BMW 3 Series

3.0 330d MHT M Sport Auto RWD Euro 6 5dr Step (281 bhp)

£18,700

Good value: £1,949 under the typical £20,649 for this model, age and mileage, drawing on 6,724 adverts of this make and model.

Overview

Make: BMW
Model: 3 Series
Trim: M SPORT
Version: 3.0 330d MHT M Sport Auto RWD Euro 6 5dr Step (281 bhp)
Mileage: 77,251 miles
Year: 2021
Fuel type: Diesel Hybrid
Body type: Estate
Engine: 3.0 L
Gearbox: Automatic
Power: 281 bhp
Seats: 5
CO2: 137 g/km
Colour: Blue
Doors: 5
Driven wheels: Rear Wheel Drive
Engine badge: 330d; MHT
Hybrid type: Mild hybrid
Emissions standard: Euro 6

About this car

This 2021 BMW 3 Series M Sport is advertised with 77,251 miles, approximately 22,600 above the typical mileage for its age. The dealer is asking £18,700, which is £1,949 below our market estimate of £20,649. We use UK dealer asking prices, including 6,724 BMW 3 Series listings, and account for the car’s age, mileage and specification. Since we first spotted the advert 58 days ago, the asking price has dropped by £2,500. Our latest MOT record expired on 29 August 2026. Check the current position with the dealer. Our comparison with the latest MOT reading has not flagged a mileage discrepancy. The seller is Sytner Select Swindon, based in Swindon.

Stock data from 23 October 2026.

How we estimate prices and check cars

Price history

First seen on 27 August 2026, 58 days ago. Advert duration calculated on 24 October 2026. Net asking-price reduction: £2,500 from the first recorded £21,200. 5 price reductions recorded, the latest observed on 23 October 2026.

Recorded asking prices
Date observed	Asking price
27 August 2026	£21,200
10 September 2026	£20,600
23 September 2026	£20,300
6 October 2026	£19,900
15 October 2026	£19,500
23 October 2026	£18,700

Price and mileage comparison

Estimated market asking price: £20,649. The asking price is £1,949 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 6,724 adverts of this make and model across different ages and specifications.

Advertised mileage is approximately 22,600 miles higher than typical for a 2021 BMW 3 Series.

The advertised mileage is consistent with the last MOT reading.

The recorded MOT has expired; ask the dealer for an up-to-date MOT.

MOT

MOT valid until 29 August 2026. 72,222 miles at the last test.

96 other cars with the same year, trim, gearbox and fuel are for sale from £13,735 to £29,995.

Other matching cars (up to five, cheapest first)
Asking price	Mileage
£13,735	131,041 miles
£13,999	102,000 miles
£14,495	131,000 miles
£15,495	95,320 miles
£15,995	111,015 miles

These cars have covered 15,500–131,041 miles, compared with 77,251 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

How to contact the dealer, its opening hours and the cheaper cars like this one are on this AskCar page.

Vehicle photos

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