2023 BMW 3 Series prices under £30,000

There are 366 used 2023 BMW 3 Series cars for sale under £30,000 from UK dealers on AskCar, as of 8 November 2026. Typical asking price £25,000 (the median: half cost less, half cost more). The cheapest is £14,600. The middle half are priced between £22,500 and £27,000. Median mileage: about 37,000 miles.

Dealers lowered the asking price on more than a third of 2023 BMW 3 Series cars under £30,000: 180 of the 366 in the 14 days to 8 November 2026.

AskCar lists 7,130 used BMW 3 Series across the UK, from 2,708 dealerships.

As of 8 November 2026, AskCar lists 595,629 cars and vans from 12,891 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.

2023 BMW 3 Series cars for sale now under £30,000, page 1 of 8

This page picks out up to 10 cars in each of these groups: best value, cheapest, lowest mileage, recently reduced and newly advertised. A car in more than one group is listed in full once. The groups pick only from cars with photos and an AskCar estimate, priced at £500 or more and no more than 25% under that estimate. 353 of the 361 cars listed here meet these rules. Pages 2 to 8 list every other 2023 BMW 3 Series car, cheapest first, including the 8 the groups do not pick from.

The AskCar estimate is our expected asking price for that one car, from its model, age, mileage and specification, using the 6,822 priced BMW 3 Series adverts on AskCar as of 8 November 2026. The figures on this page describe the cars advertised, not a valuation of every 2023 BMW 3 Series.

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 5 cars whose advertised mileage is lower than the mileage recorded at their last MOT test.

Best value 2023 BMW 3 Series: priced furthest below the AskCar estimate

These 10 are priced 12% to 18% under their AskCar estimate. Their asking prices run from £21,199 to £28,449.

Cheapest 2023 BMW 3 Series: the lowest asking prices

These 10 are priced £14,600 to £17,155. They have covered 75,197 to 123,000 miles.

Lowest-mileage 2023 BMW 3 Series

These 10 have covered 6,473 to 11,113 miles. Their asking prices run from £25,099 to £29,980.

Recently reduced 2023 BMW 3 Series: the biggest price reductions in the 14 days to 8 November 2026

The dealer lowered the asking price on each of these 10 in the 14 days to 8 November 2026. Their reductions since AskCar first saw them run from £3,500 to £5,710.

Newly advertised 2023 BMW 3 Series: first seen by AskCar in the 7 days to 8 November 2026

These 10 are the most recently advertised. Cars first seen on the same day are listed cheapest first.

BMW 3 Series by gearbox, fuel and body

BMW 3 Series under £30,000 by gearbox, fuel and body

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