2021 BMW 3 Series SE PRO prices

There are 33 used 2021 BMW 3 Series SE PRO cars for sale from UK dealers on AskCar, as of 8 November 2026. Typical asking price £14,800 (the median: half cost less, half cost more). The cheapest is £10,000. The middle half are priced between £12,500 and £16,500. Median mileage: about 72,000 miles.

Dealers lowered the asking price on more than a third of 2021 BMW 3 Series SE PRO cars: 13 of the 33 in the 14 days to 8 November 2026.

2021 BMW 3 Series SE PRO 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 plug-in hybrid£14,800Too few for saleToo few for saleToo few for sale£12,800

Typical asking prices are of 2021 BMW 3 Series SE PRO cars for sale on 8 November 2026, and are given only where at least 20 cars with a price are for sale.

2021 BMW 3 Series SE PRO against other years

A 2022 BMW 3 Series SE PRO car has a typical asking price of £14,700, as of 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.

2021 BMW 3 Series SE PRO 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. All 32 cars listed here meet these rules. Page 2 lists every other 2021 BMW 3 Series SE PRO car, cheapest first.

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 2021 BMW 3 Series SE PRO.

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 2021 BMW 3 Series SE PRO: priced furthest below the AskCar estimate

These 10 are priced 3% to 15% under their AskCar estimate. Their asking prices run from £11,695 to £16,999.

Cheapest 2021 BMW 3 Series SE PRO: the lowest asking prices

These 10 are priced £10,000 to £12,569. They have covered 82,791 to 129,000 miles.

Lowest-mileage 2021 BMW 3 Series SE PRO

These 10 have covered 33,850 to 52,634 miles. Their asking prices run from £15,895 to £17,998.

Recently reduced 2021 BMW 3 Series SE PRO: 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 £431 to £2,099.

Newly advertised 2021 BMW 3 Series SE PRO: first seen by AskCar in the 7 days to 8 November 2026

These 3 are the most recently advertised. Cars first seen on the same day are listed cheapest first.

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