Used petrol BMW 3 Series for sale under £20,000

There are 1,061 used petrol BMW 3 Series under £20,000 for sale from UK dealers on AskCar, as of 30 October 2026. Typical asking price £10,700 (the median: half cost less, half cost more). The cheapest is £890. AskCar lists 6,987 used BMW 3 Series across the UK, from 2,629 dealerships.

The middle half of the 1,061 cars are priced between £7,000 and £16,800.

As of 30 October 2026, AskCar lists 580,490 cars and vans from 12,695 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.

280 of the 1,061 cars had their price reduced in the last 14 days to 30 October 2026.

Median asking price by year

YearFor sale with a priceMedian asking priceMiddle half priced between
202191£18,400£17,000 to £19,300
202081£18,300£17,000 to £19,000
2019141£17,500£15,400 to £18,700
2018107£12,100£9,900 to £14,500
201742£11,400£9,100 to £14,900
201693£9,000£7,600 to £11,500
201562£9,000£7,500 to £11,000
201448£8,900£7,300 to £9,700
201365£7,500£6,200 to £9,000
201240£6,100£5,000 to £7,600
201138£6,000£4,600 to £7,000
201028£5,000£3,800 to £6,600
200937£4,500£3,000 to £6,000
200821£4,500£3,800 to £6,000
200737£5,000£3,500 to £8,000

Cars for sale now, page 11 of 11

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 6,706 priced BMW 3 Series adverts on AskCar as of 30 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.

BMW 3 Series by gearbox, fuel and body

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