2021 BMW 4 Series 2.0 420i M Sport

Overview

• Make: BMW
• Model: 4 Series
• Trim: M Sport
• Version: 2.0 420i M Sport [Pro Pack] Auto RWD Euro 6 2dr Step (181 bhp)
• Year: 2021
• Mileage: 50,871 miles
• Fuel: Petrol
• Body: 2 doors, 4 seats
• Engine: 2.0 litres, 181 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: Blue
• CO2: 151 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 50,871 miles, this 2021 BMW 4 Series M Sport has covered about 6,900 more miles than other 2021 BMW 4 Series cars. The AskCar estimate for this car is £22,613. It is priced at £23,150, which is £537 above that estimate. The AskCar estimate uses 1,816 UK dealer adverts for the BMW 4 Series, with adjustments for age, mileage, trim, engine and other specifications. We first recorded this advert 54 days ago, and its asking price has since fallen by £350. The latest recorded MOT expiry date is 25 September 2026, which has passed. Confirm its status with the dealer. Its advertised mileage matches the government's MOT record. The seller is Sytner Select Northampton, based in Northampton. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 8 November 2026.

How we estimate prices and check cars

Price

Fair price: £537 (2%) over the AskCar estimate of £22,613.

The AskCar estimate is our expected asking price for this car. It uses UK dealer asking prices, accounting for make, model, trim, version, age, mileage, fuel, gearbox, body type, driven wheels, engine size and power. It is an advertised price, not a confirmed sale price.

It draws on 1,816 priced BMW 4 Series adverts across different ages and specifications, as of 8 November 2026.

A 2021 BMW 4 Series with the 2.0 petrol engine is typically advertised at £24,000: the median of the 142 for sale on AskCar, as of 8 November 2026.

Time on sale

This 2021 BMW 4 Series has been on sale for at least 54 days.

Price history

AskCar first saw this advert on 15 September 2026 at £23,500. Its asking price is now £23,150, £350 less. The latest price cut was seen on 22 October 2026.

Price changes recorded:

• 15 September 2026: £23,500
• 22 October 2026: £23,150

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 8 November 2026: the latest record we hold ran out on 25 September 2026; ask the dealer for the current MOT.

It failed its MOT on 15 September 2025 (nearside front tyre has a bulge, caused by separation or partial failure of its structure) and passed later the same day.

There were no advisories at the latest test.

Mileage at that test: 41,849 miles, which matches the advertised 50,871 miles.

Advertised mileage is about 6,900 miles higher than the median mileage of a 2021 BMW 4 Series on AskCar.