2021 BMW 3 Series 3.0 330d MHT M Sport

Overview

• Make: BMW
• Model: 3 Series
• Trim: M Sport
• Version: 3.0 330d MHT M Sport Auto RWD Euro 6 5dr Step (281 bhp)
• Year: 2021
• Mileage: 77,251 miles
• Fuel: Diesel, mild hybrid
• Body: Estate, 5 doors, 5 seats
• Engine: 3.0 litres, 281 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: Blue
• CO2: 137 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 BMW 3 Series M Sport is advertised with 77,251 miles, approximately 22,100 above the typical mileage for its age. The dealer is asking £18,700, which is £1,260 below the AskCar estimate of £19,960. To work out the AskCar estimate, we analyse UK dealer adverts for 6,902 BMW 3 Series cars across different ages and specifications. We first saw this car advertised 71 days ago. Its asking price has since fallen by £2,500. Our latest MOT record expired on 29 August 2026. Check the current position with the dealer. Its advertised mileage matches the government's MOT record. The seller is Sytner Select Swindon, based in Swindon. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 6 November 2026.

How we estimate prices and check cars

Price

Fair price: £1,260 (6%) under the AskCar estimate of £19,960.

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 6,902 priced BMW 3 Series adverts across different ages and specifications, as of 6 November 2026.

A 2021 BMW 3 Series with the 3.0 diesel engine is typically advertised at £28,500: the median of the 146 for sale on AskCar, as of 6 November 2026.

Time on sale

This 2021 BMW 3 Series has been on sale for at least 71 days.

Price history

AskCar first saw this advert on 27 August 2026 at £21,200. Its asking price is now £18,700, £2,500 less. The latest price cut was seen on 23 October 2026.

Price changes recorded:

• 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

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 6 November 2026: the latest record we hold ran out on 29 August 2026; ask the dealer for the current MOT.

It has had 3 MOTs. The latest, on 22 August 2025, passed.

There were no advisories at the latest test.

Mileage at that test: 72,222 miles, which matches the advertised 77,251 miles.

Advertised mileage is about 22,100 miles higher than the median mileage of a 2021 BMW 3 Series on AskCar.

Similar cars

7 other 2021 BMW 3 Series M Sport 3.0 diesel automatic estates are for sale at UK dealers, from £19,990 to £28,890, as of 6 November 2026.

The 3 closest to this car in mileage:

• 2021 BMW 3 Series M Sport, 3.0 diesel estate, blue. Mileage: 70,960 miles. Price: £19,990, £1,290 more than this car. Dealer: The Donalds Group Donalds Kia Ipswich in Ipswich. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-cc4e2f5c69d6
• 2021 BMW 3 Series M Sport, 3.0 diesel estate, black. Mileage: 69,074 miles. Price: £24,942, £6,242 more than this car. Dealer: Ocean Plymouth in Plymouth. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-22df3f34c741
• 2021 BMW 3 Series M Sport, 3.0 diesel estate, black. Mileage: 56,000 miles. Price: £22,950, £4,250 more than this car. Dealer: Charles Hurst Usedirect Portadown in Belfast. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-1807564595f5

• The nearest: 2021 BMW 3 Series M Sport, 3.0 diesel estate, white, 96 miles from this car. Mileage: 27,127 miles. Price: £28,890, £10,190 more than this car. Dealer: Stratstone Derby BMW in Derby. AskCar page: https://askcar.co.uk/car/bmw-3-series-2021-de5f2dfe675d