2020 BMW 3 Series prices

This 2020 BMW 3 Series is no longer listed. Here are similar cars for sale now.

There are 525 used 2020 BMW 3 Series cars for sale from UK dealers on AskCar, as of 7 November 2026. Typical asking price £19,000 (the median: half cost less, half cost more). The cheapest is £9,695. The middle half are priced between £16,800 and £22,000. Median mileage: about 59,000 miles.

Dealers lowered the asking price on more than a third of 2020 BMW 3 Series cars: 198 of the 525 in the 14 days to 7 November 2026.

2020 BMW 3 Series prices by engine and mileage

A 2020 BMW 3 Series 3.0 petrol car typically costs £28,000, against £18,500 for the 2.0 diesel, as of 7 November 2026.

A 2020 BMW 3 Series 2.0 diesel car with 20,000 to 40,000 miles typically costs £21,500, against £16,600 with 60,000 miles or more.

EngineAll mileagesUnder 20,000 miles20,000 to 40,000 miles40,000 to 60,000 miles60,000 miles or more
2.0 diesel£18,500Too few for sale£21,500£20,000£16,600
3.0 petrol£28,000Too few for saleToo few for saleToo few for sale£25,000

2020 BMW 3 Series prices by trim

TrimTypical asking price, 2020 cars
M Sport£19,000
Sport£17,700
M Sport Plus Edition£21,000
SEToo few for sale
M Sport PRO EditionToo few for sale
SE PROToo few for sale
Sport PROToo few for sale

Only 17 of the 2020 BMW 3 Series cars for sale are SE, too few to give a typical asking price.

Only 11 of the 2020 BMW 3 Series cars for sale are M Sport PRO Edition, too few to give a typical asking price.

Only 9 of the 2020 BMW 3 Series cars for sale are SE PRO, too few to give a typical asking price.

Only 6 of the 2020 BMW 3 Series cars for sale are Sport PRO, too few to give a typical asking price.

Typical asking prices are of 2020 BMW 3 Series cars for sale on 7 November 2026, and are given only where at least 20 cars with a price are for sale.

2020 BMW 3 Series against other years

A 2019 BMW 3 Series car has a typical asking price of £17,700 and a 2021 one £20,500, as of 7 November 2026.

AskCar lists 7,202 used BMW 3 Series across the UK, from 2,724 dealerships.

As of 7 November 2026, AskCar lists 601,018 cars and vans from 12,892 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.

2020 BMW 3 Series cars for sale now, page 1 of 11

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. 494 of the 503 cars listed here meet these rules. Pages 2 to 11 list every other 2020 BMW 3 Series car, cheapest first, including the 9 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 6,886 priced BMW 3 Series adverts on AskCar as of 7 November 2026. The figures on this page describe the cars advertised, not a valuation of every 2020 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 22 cars whose advertised mileage is lower than the mileage recorded at their last MOT test.

Best value 2020 BMW 3 Series: priced furthest below the AskCar estimate

These 10 are priced 13% to 23% under their AskCar estimate. Their asking prices run from £12,690 to £33,000.

Cheapest 2020 BMW 3 Series: the lowest asking prices

These 10 are priced £9,695 to £11,440. They have covered 91,189 to 167,159 miles.

Lowest-mileage 2020 BMW 3 Series

These 10 have covered 11,948 to 20,257 miles. Their asking prices run from £22,498 to £33,000.

Recently reduced 2020 BMW 3 Series: the biggest price reductions in the 14 days to 7 November 2026

The dealer lowered the asking price on each of these 10 in the 14 days to 7 November 2026. Their reductions since AskCar first saw them run from £2,800 to £5,000.

Newly advertised 2020 BMW 3 Series: first seen by AskCar in the 7 days to 7 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 prices by year

BMW 3 Series by trim

2020 BMW 3 Series by price

2020 BMW 3 Series by trim

BMW 3 Series by price

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