2021 BMW 4 Series prices

This 2021 BMW 4 Series is no longer listed. Here are similar cars for sale now.

There are 197 used 2021 BMW 4 Series cars for sale from UK dealers on AskCar, as of 7 November 2026. Typical asking price £25,000 (the median: half cost less, half cost more). The cheapest is £17,490. The middle half are priced between £23,000 and £28,000. Median mileage: about 44,000 miles.

Dealers lowered the asking price on more than a third of 2021 BMW 4 Series cars: 87 of the 197 in the 14 days to 7 November 2026.

2021 BMW 4 Series prices by engine and mileage

A 2021 BMW 4 Series 3.0 petrol car typically costs £30,000, against £24,000 for the 2.0 petrol, as of 7 November 2026.

A 2021 BMW 4 Series 2.0 petrol car with 20,000 to 40,000 miles typically costs £25,000, against £21,000 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 petrol£24,000Too few for sale£25,000£24,000£21,000
3.0 petrol£30,000Too few for saleToo few for saleToo few for saleToo few for sale

2021 BMW 4 Series prices by trim

TrimTypical asking price, 2021 cars
M Sport£23,500
M Sport PRO EditionToo few for sale

Only 15 of the 2021 BMW 4 Series cars for sale are M Sport PRO Edition, too few to give a typical asking price.

Typical asking prices are of 2021 BMW 4 Series cars for sale on 7 November 2026, and are given only where at least 20 cars with a price are for sale.

2021 BMW 4 Series against other years

A 2020 BMW 4 Series car has a typical asking price of £20,000 and a 2022 one £28,000, as of 7 November 2026.

AskCar lists 1,882 used BMW 4 Series across the UK, from 1,079 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.

2021 BMW 4 Series cars for sale now, page 1 of 4

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. 187 of the 189 cars listed here meet these rules. Pages 2 to 4 list every other 2021 BMW 4 Series 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 1,825 priced BMW 4 Series adverts on AskCar as of 7 November 2026. The figures on this page describe the cars advertised, not a valuation of every 2021 BMW 4 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 8 cars whose advertised mileage is lower than the mileage recorded at their last MOT test.

Best value 2021 BMW 4 Series: priced furthest below the AskCar estimate

These 10 are priced 9% to 18% under their AskCar estimate. Their asking prices run from £18,995 to £34,555.

Cheapest 2021 BMW 4 Series: the lowest asking prices

These 10 are priced £17,490 to £19,900. They have covered 49,500 to 97,000 miles.

Lowest-mileage 2021 BMW 4 Series

These 10 have covered 9,654 to 18,655 miles. Their asking prices run from £24,995 to £37,299.

Recently reduced 2021 BMW 4 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 £2,505 to £5,840.

Newly advertised 2021 BMW 4 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 4 Series by gearbox, fuel and body

BMW 4 Series prices by year

BMW 4 Series by trim

2021 BMW 4 Series by price

2021 BMW 4 Series by trim

BMW 4 Series by price

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