2021 BMW X3 M

3.0 i Competition Auto 4WD Euro 6 (s/s) 5dr (503 bhp)

£52,000

Fair price: within 8% of the typical £49,554 for this model, age and mileage, drawing on 132 adverts of this make and model.

Overview

Make: BMW
Model: X3 M
Trim: COMPETITION
Version: 3.0 i Competition Auto 4WD Euro 6 (s/s) 5dr (503 bhp)
Mileage: 28,563 miles
Year: 2021
Fuel type: Petrol
Body type: SUV
Engine: 3.0 L
Gearbox: Automatic
Power: 503 bhp
Seats: 5
Colour: Black
Doors: 5
Driven wheels: Four Wheel Drive
Engine badge: Competition
Emissions standard: Euro 6

About this car

With 28,563 miles on the clock, this 2021 BMW X3 M Competition has done roughly 9,600 fewer miles than a typical 2021 BMW X3 M. The dealer is asking £52,000, which is £2,446 above our market estimate of £49,554. Our estimate draws on 132 BMW X3 M adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. We first recorded this car for sale 147 days ago. You can find this car at Seaton Car Sales in Hartlepool.

Stock data from 21 October 2026.

How we estimate prices and check cars

Price history

First seen on 28 May 2026, 147 days ago. Advert duration calculated on 22 October 2026.

Recorded asking prices
Date observed	Asking price
29 May 2026	£52,000
10 July 2026	£52,000
21 October 2026	£52,000

Price and mileage comparison

Estimated market asking price: £49,554. The asking price is £2,446 above 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 132 adverts of this make and model across different ages and specifications.

Advertised mileage is approximately 9,600 miles lower than typical for a 2021 BMW X3 M.

25 other cars with the same year, trim, gearbox and fuel are for sale from £36,000 to £57,995.

Other matching cars (up to five, cheapest first)
Asking price	Mileage
£36,000	85,546 miles
£39,995	60,994 miles
£39,995	62,137 miles
£40,995	47,300 miles
£41,995	57,000 miles

These cars have covered 21,328–85,546 miles, compared with 28,563 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 X3 M cars for sale · 2021 BMW X3 M price guide

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Dealer

Seaton Car Sales, Hartlepool. Across the dealer network: 36 cars for sale.

Dealer postcode: TS25 2BQ.