2021 BMW 3 Series

3.0 M340i MHT Auto 4WD Euro 6 (s/s) 4dr (369 bhp)

£30,995

Fair price: within 8% of the typical £33,119 for this model, age and mileage, drawing on 6,811 adverts of this make and model.

Overview

Make: BMW
Model: 3 Series
Version: 3.0 M340i MHT Auto 4WD Euro 6 (s/s) 4dr (369 bhp)
Mileage: 39,921 miles
Year: 2021
Fuel type: Petrol Hybrid
Body type: Saloon
Engine: 3.0 L
Gearbox: Automatic
Power: 369 bhp
Seats: 5
CO2: 176 g/km
Colour: Black
Doors: 4
Driven wheels: Four Wheel Drive
Engine badge: M340i; MHT
Hybrid type: Mild hybrid
Emissions standard: Euro 6

About this car

This 2021 BMW 3 Series has covered 39,921 miles, around 14,600 fewer than typical for its age. Its asking price of £30,995 is £2,124 below our estimate of £33,119. We use UK dealer asking prices, including 6,811 BMW 3 Series listings, and account for the car’s age, mileage and specification. Since we first spotted the advert 34 days ago, the asking price has dropped by £1,455. Its recorded MOT is valid until 23 March 2027, and its advertised mileage is consistent with the latest MOT reading. The seller is JGM Group, based in Belfast.

Stock data from 20 October 2026.

How we estimate prices and check cars

Price history

First seen on 17 September 2026, 34 days ago. Advert duration calculated on 21 October 2026. Net asking-price reduction: £1,455 from the first recorded £32,450. 3 price reductions recorded, the latest observed on 20 October 2026.

Recorded asking prices
Date observed	Asking price
17 September 2026	£32,450
20 September 2026	£31,995
12 October 2026	£31,450
20 October 2026	£30,995

Price and mileage comparison

Estimated market asking price: £33,119. The asking price is £2,124 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 6,811 adverts of this make and model across different ages and specifications.

Advertised mileage is approximately 14,600 miles lower than typical for a 2021 BMW 3 Series.

The advertised mileage is consistent with the last MOT reading.

MOT

MOT valid until 23 March 2027. 38,258 miles at the last test.

57 other cars with the same year, trim, gearbox and fuel are for sale from £25,475 to £45,000.

Other matching cars (up to five, cheapest first)
Asking price	Mileage
£25,475	89,162 miles
£25,995	84,000 miles
£26,495	73,000 miles
£26,750	37,000 miles
£26,995	76,150 miles

These cars have covered 6,593–89,162 miles, compared with 39,921 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

JGM Group, Belfast. Across the dealer network: 51 cars for sale.

Dealer postcode: BT16 1TQ.