Used diesel BMW X3 for sale under £20,000

There are 783 used diesel BMW X3 under £20,000 for sale from UK dealers on AskCar, as of 29 October 2026. Typical asking price £13,000 (the median: half cost less, half cost more). The cheapest is £1,695. AskCar lists 3,088 used BMW X3 across the UK, from 1,215 dealerships.

The middle half of the 783 cars are priced between £9,000 and £17,500.

As of 29 October 2026, AskCar lists 587,923 cars and vans from 12,992 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.

254 of the 783 cars had their price reduced in the last 14 days to 29 October 2026.

Median asking price by year

YearFor sale with a priceMedian asking priceMiddle half priced between
2019135£18,400£17,200 to £19,500
201894£18,000£16,100 to £19,000
2017107£14,000£12,600 to £16,000
2016137£12,000£10,500 to £14,400
201586£10,500£8,500 to £12,000
201472£9,000£7,000 to £11,000
201352£7,000£6,000 to £8,500
201232£6,800£5,400 to £7,700
201123£6,000£4,500 to £6,500

Cars for sale now, page 3 of 8

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 2,986 priced BMW X3 adverts on AskCar as of 29 October 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.

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BMW X3 by gearbox, fuel and body

Diesel BMW X3 by price

BMW X3 prices by year

BMW X3 by price

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