Used diesel Audi A3 for sale under £20,000

There are 1,032 used diesel Audi A3 under £20,000 for sale from UK dealers on AskCar, as of 30 October 2026. Typical asking price £8,400 (the median: half cost less, half cost more). The cheapest is £995. AskCar lists 6,654 used Audi A3 across the UK, from 2,240 dealerships.

The middle half of the 1,032 cars are priced between £6,000 and £11,500.

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.

302 of the 1,032 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
202333£18,900£18,500 to £19,500
202233£17,200£16,400 to £19,000
202128£16,000£13,700 to £17,400
202044£15,400£14,200 to £17,200
201978£12,900£10,400 to £14,000
201874£10,500£9,000 to £12,700
2017126£9,300£7,800 to £11,000
2016164£8,000£6,700 to £9,700
2015162£7,000£6,000 to £9,000
2014119£7,000£5,500 to £8,300
201367£5,000£4,000 to £6,500
201230£3,700£3,000 to £4,900

Cars for sale now, page 5 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 6,475 priced Audi A3 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.

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