2018 BMW 3 Series SE prices

There are 27 used 2018 BMW 3 Series SE cars for sale from UK dealers on AskCar, as of 9 November 2026. Typical asking price £11,500 (the median: half cost less, half cost more). The cheapest is £6,149. The middle half are priced between £8,000 and £13,000. Median mileage: about 65,000 miles.

Dealers lowered the asking price on more than a third of 2018 BMW 3 Series SE cars: 13 of the 27 in the 14 days to 9 November 2026.

2018 BMW 3 Series SE prices by engine and mileage

EngineAll mileagesUnder 20,000 miles20,000 to 40,000 miles40,000 to 60,000 miles60,000 miles or more
2.0 diesel£11,000Too few for saleToo few for saleToo few for saleToo few for sale

Only 6 of the 2018 BMW 3 Series SE cars for sale have the 1.5 petrol engine, too few to give a typical asking price.

Typical asking prices are of 2018 BMW 3 Series SE cars for sale on 9 November 2026, and are given only where at least 20 cars with a price are for sale.

2018 BMW 3 Series SE against other years

A 2017 BMW 3 Series SE car has a typical asking price of £8,500 and a 2019 one £13,000, as of 9 November 2026.

AskCar lists 7,087 used BMW 3 Series across the UK, from 2,693 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.

2018 BMW 3 Series SE cars for sale now, 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. 24 of the 26 cars listed here meet these rules. Page 2 lists every other 2018 BMW 3 Series SE car, cheapest first, including the 2 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 6,814 priced BMW 3 Series adverts on AskCar as of 9 November 2026. The figures on this page describe the cars advertised, not a valuation of every 2018 BMW 3 Series SE.

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 1 car whose advertised mileage is lower than the mileage recorded at its last MOT test.

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

These 10 are priced 2% to 15% under their AskCar estimate. Their asking prices run from £6,149 to £13,790.

Cheapest 2018 BMW 3 Series SE: the lowest asking prices

These 10 are priced £6,149 to £9,494. They have covered 81,000 to 110,950 miles.

Lowest-mileage 2018 BMW 3 Series SE

These 10 have covered 11,500 to 58,000 miles. Their asking prices run from £10,146 to £16,499.

Recently reduced 2018 BMW 3 Series SE: the biggest price reductions in the 14 days to 9 November 2026

The dealer lowered the asking price on each of these 10 in the 14 days to 9 November 2026. Their reductions since AskCar first saw them run from £200 to £1,990.

Newly advertised 2018 BMW 3 Series SE: first seen by AskCar in the 7 days to 9 November 2026

These 2 are the most recently advertised. Cars first seen on the same day are listed cheapest first.

BMW 3 Series by gearbox, fuel and body

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