Used automatic Mazda Mazda3 for sale under £20,000

There are 286 used automatic Mazda Mazda3 under £20,000 for sale from UK dealers on AskCar, as of 9 November 2026. Typical asking price £16,500 (the median: half cost less, half cost more). The cheapest is £995. AskCar lists 1,217 used Mazda Mazda3 across the UK, from 656 dealerships.

The middle half of the 286 cars are priced between £12,000 and £18,400.

As of 9 November 2026, AskCar lists 584,619 cars and vans from 12,676 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.

141 of the 286 cars had their price reduced in the last 14 days to 9 November 2026.

Median asking price by year

YearFor sale with a priceMedian asking priceMiddle half priced between
202681£18,800£18,200 to £19,000
202547£16,900£16,400 to £17,900
202322£17,000£15,500 to £18,200

Cars for sale now, page 2 of 3

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 1,184 priced Mazda Mazda3 adverts on AskCar as of 9 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.

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