2017 Audi S3 prices under £20,000

There are 104 used 2017 Audi S3 cars for sale under £20,000 from UK dealers on AskCar, as of 9 November 2026. Typical asking price £17,100 (the median: half cost less, half cost more). The cheapest is £10,995. The middle half are priced between £15,700 and £18,500. Median mileage: about 74,000 miles.

Dealers lowered the asking price on more than a quarter of 2017 Audi S3 cars under £20,000: 27 of the 104 in the 14 days to 9 November 2026.

AskCar lists 1,024 used Audi S3 across the UK, from 625 dealerships.

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.

2017 Audi S3 cars for sale now under £20,000, page 2 of 3

This page lists 2017 Audi S3 cars not picked out on page 1, cheapest first.

The AskCar estimate is our expected asking price for that one car, from its model, age, mileage and specification, using the 1,005 priced Audi S3 adverts on AskCar as of 9 November 2026. The figures on this page describe the cars advertised, not a valuation of every 2017 Audi S3.

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. Each car's AskCar page has its full price history and cheaper cars like it.

This list leaves out 4 cars whose advertised mileage is lower than the mileage recorded at their last MOT test.

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Audi S3 by gearbox, fuel and body

Audi S3 under £20,000 by gearbox, fuel and body

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