2018 BMW 3 Series prices under £8,000

There are 32 used 2018 BMW 3 Series cars for sale under £8,000 from UK dealers on AskCar, as of 10 November 2026. Typical asking price £7,000 (the median: half cost less, half cost more). The cheapest is £3,594. The middle half are priced between £6,500 and £7,700. Median mileage: about 108,000 miles.

Dealers lowered the asking price on more than a third of 2018 BMW 3 Series cars under £8,000: 11 of the 32 in the 14 days to 10 November 2026.

AskCar lists 7,127 used BMW 3 Series across the UK, from 2,713 dealerships.

As of 10 November 2026, AskCar lists 591,054 cars and vans from 12,888 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.

2018 BMW 3 Series cars for sale now under £8,000, page 1 of 2

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. 27 of the 30 cars listed here meet these rules. Page 2 lists every other 2018 BMW 3 Series car, cheapest first, including the 3 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 6,864 priced BMW 3 Series adverts on AskCar as of 10 November 2026. The figures on this page describe the cars advertised, not a valuation of every 2018 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 2 cars whose advertised mileage is lower than the mileage recorded at their last MOT test.

Best value 2018 BMW 3 Series: priced furthest below the AskCar estimate

These 10 are priced 6% to 22% under their AskCar estimate. Their asking prices run from £4,985 to £7,995.

Cheapest 2018 BMW 3 Series: the lowest asking prices

These 10 are priced £4,985 to £6,900. They have covered 99,918 to 157,109 miles.

Lowest-mileage 2018 BMW 3 Series

These 10 have covered 81,000 to 105,593 miles. Their asking prices run from £6,490 to £7,995.

Recently reduced 2018 BMW 3 Series: the biggest price reductions in the 14 days to 10 November 2026

The dealer lowered the asking price on each of these 9 in the 14 days to 10 November 2026. Their reductions since AskCar first saw them run from £200 to £2,500.

Newly advertised 2018 BMW 3 Series: first seen by AskCar in the 7 days to 10 November 2026

This car is the most recently advertised.

BMW 3 Series by gearbox, fuel and body

BMW 3 Series under £8,000 by gearbox, fuel and body

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