Used petrol BMW X3 for sale under £20,000

There are 85 used petrol BMW X3 under £20,000 for sale from UK dealers on AskCar, as of 7 November 2026. Typical asking price £17,500 (the median: half cost less, half cost more). The cheapest is £2,250. AskCar lists 3,156 used BMW X3 across the UK, from 1,227 dealerships.

The middle half of the 85 cars are priced between £15,500 and £18,800.

As of 7 November 2026, AskCar lists 601,018 cars and vans from 12,892 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.

36 of the 85 cars had their price reduced in the last 14 days to 7 November 2026.

Median asking price by year

YearFor sale with a priceMedian asking priceMiddle half priced between
201934£18,200£17,100 to £19,000
201833£17,700£16,500 to £18,800

Cars for sale now

Best value first: the cars priced furthest below their AskCar estimate come first, and those without one come after. The AskCar estimate is our expected asking price for that one car, from its model, age, mileage and specification, using the 3,052 priced BMW X3 adverts on AskCar as of 7 November 2026.

Each car: year, make, model, engine and trim, power, gearbox, fuel, body, doors, colour; mileage; price and its changes; how the price compares with the AskCar estimate; emissions standard and ULEZ compliance where it holds; MOT; dealer and town; AskCar page.

Cheaper cars like each one, with its price history, are on its AskCar page.

BMW X3 by gearbox, fuel and body

Petrol BMW X3 by price

BMW X3 prices by year

BMW X3 by price

BMW X3 near you

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