Used automatic BMW M3 for sale under £20,000

There are 25 used automatic BMW M3 under £20,000 for sale from UK dealers on AskCar, as of 5 November 2026. Typical asking price £18,000 (the median: half cost less, half cost more). The cheapest is £9,995. AskCar lists 808 used BMW M3 across the UK, from 469 dealerships.

The middle half of the 25 cars are priced between £14,500 and £19,000.

As of 5 November 2026, AskCar lists 595,776 cars and vans from 12,945 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.

3 of the 25 cars had their price reduced in the last 14 days to 5 November 2026.

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 753 priced BMW M3 adverts on AskCar as of 5 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 M3 by gearbox, fuel and body

Automatic BMW M3 by price

BMW M3 prices by year

BMW M3 by price

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Automatic cars and vans under £20,000

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