2021 BMW 4 Series 2.0 420d MHT M Sport

Overview

• Make: BMW
• Model: 4 Series
• Trim: M Sport
• Version: 2.0 420d MHT M Sport Auto RWD Euro 6 2dr (187 bhp)
• Year: 2021
• Mileage: 73,186 miles
• Fuel: Diesel, mild hybrid
• Body: 2 doors, 4 seats
• Engine: 2.0 litres, 187 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: Grey
• CO2: 136 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 BMW 4 Series M Sport is advertised with 73,186 miles, approximately 29,200 above the typical mileage for its age. Priced at £22,500, it is advertised £2,873 above the AskCar estimate of £19,627. To work out the AskCar estimate, we analyse UK dealer adverts for 1,816 BMW 4 Series cars across different ages and specifications. The asking price is now £500 lower than when we first recorded the advert 38 days ago. Our latest MOT record expired on 31 October 2026. Check the current position with the dealer. We checked its advertised mileage against the government's MOT record, and they match. The seller is Sytner High Wycombe BMW, based in High Wycombe. 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

Above the going rate: £2,873 (14%) over the AskCar estimate of £19,627.

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 diesel 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 38 days.

Price history

AskCar first saw this advert on 1 October 2026 at £23,000. Its asking price is now £22,500, £500 less. The latest price cut was seen on 2 November 2026.

Price changes recorded:

• 1 October 2026: £23,000
• 2 November 2026: £22,500

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 31 October 2026; ask the dealer for the current MOT.

It failed its MOT on 28 October 2025 (nearside front inner tyre has ply or cords exposed; offside rear inner tyre has ply or cords exposed; nearside rear outer tyre has ply or cords exposed sidewall) and passed later the same day.

Advisories at the latest test: offside front shock absorbers has light misting of oil; nearside front shock absorbers has light misting of oil; offside front suspension arm ball joint has slight play.

Mileage at that test: 61,147 miles, which matches the advertised 73,186 miles.

Advertised mileage is about 29,200 miles higher than the median mileage of a 2021 BMW 4 Series on AskCar.