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

There are 1,097 used petrol BMW 3 Series under £20,000 for sale from UK dealers on AskCar, as of 29 October 2026. Typical asking price £10,400 (the median: half cost less, half cost more). The cheapest is £890. AskCar lists 7,078 used BMW 3 Series across the UK, from 2,699 dealerships.

The middle half of the 1,097 cars are priced between £6,900 and £16,500.

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.

289 of the 1,097 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
202193£18,400£17,000 to £19,400
202081£18,000£17,000 to £19,000
2019145£17,500£15,400 to £18,600
2018106£12,300£10,000 to £14,500
201745£10,800£9,000 to £14,500
201690£9,000£7,600 to £11,500
201565£9,000£7,500 to £11,000
201450£8,900£7,400 to £9,600
201370£7,500£6,000 to £8,900
201244£6,200£5,000 to £8,400
201139£6,000£4,700 to £7,000
201032£5,000£4,000 to £7,000
200941£5,000£3,000 to £6,000
200820£4,700£3,900 to £6,000
200743£5,000£3,600 to £7,500

Cars for sale now, page 2 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 6,692 priced BMW 3 Series 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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