2021 BMW X3 M

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

£43,495

Fair price: within 8% of the typical £44,984 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: 46,924 miles
Year: 2021
Fuel type: Petrol
Body type: SUV
Engine: 3.0 L
Gearbox: Automatic
Power: 503 bhp
Seats: 5
CO2: 263 g/km
Colour: Black
Doors: 5
Driven wheels: Four Wheel Drive
Engine badge: Competition
Emissions standard: Euro 6

About this car

With 46,924 miles on the clock, this 2021 BMW X3 M Competition has done roughly 8,700 more miles than a typical 2021 BMW X3 M. Our estimated market asking price is £44,984. This car is advertised at £43,495, which is £1,489 below that figure. To estimate its market asking price, we analyse UK dealer adverts for 132 BMW X3 M cars across different ages and specifications. The asking price is now £1,000 lower than when we first recorded the advert 56 days ago. Its MOT is recorded as valid until 29 July 2027. The advertised mileage is consistent with the latest MOT reading. It is for sale at KAYENN Prestige in Heywood.

Stock data from 21 October 2026.

How we estimate prices and check cars

Price history

First seen on 27 August 2026, 56 days ago. Advert duration calculated on 22 October 2026. Net asking-price reduction: £1,000 from the first recorded £44,495. 2 price reductions recorded, the latest observed on 8 October 2026.

Recorded asking prices
Date observed	Asking price
27 August 2026	£44,495
25 September 2026	£43,995
8 October 2026	£43,495
21 October 2026	£43,495

Price and mileage comparison

Estimated market asking price: £44,984. The asking price is £1,489 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 132 adverts of this make and model across different ages and specifications.

Advertised mileage is approximately 8,700 miles higher than typical for a 2021 BMW X3 M.

The advertised mileage is consistent with the last MOT reading.

MOT

MOT valid until 29 July 2027. 46,480 miles at the last test.

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 46,924 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

KAYENN Prestige, Heywood. Across the dealer network: 14 cars for sale.

Dealer postcode: OL10 2JG.