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: 93,379 miles
• Fuel: Diesel, mild hybrid
• Body: 2 doors, 4 seats
• Engine: 2.0 litres, 187 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: Blue
• CO2: 127 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 BMW 4 Series M Sport is advertised with 93,379 miles, approximately 49,300 above the typical mileage for its age. Priced at £18,700, it is advertised £1,706 above the AskCar estimate of £16,994. The AskCar estimate uses 1,826 UK dealer adverts for the BMW 4 Series, with adjustments for age, mileage, trim, engine and other specifications. Since we first spotted the advert 162 days ago, the asking price has dropped by £2,200. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Sytner Select Cardiff, based in Cardiff. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 6 November 2026.

How we estimate prices and check cars

Price

Above the going rate: £1,706 (10%) over the AskCar estimate of £16,994.

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 1,826 priced BMW 4 Series adverts across different ages and specifications, as of 6 November 2026.

A 2021 BMW 4 Series with the 2.0 diesel engine is typically advertised at £23,800: the median of the 148 for sale on AskCar, as of 6 November 2026.

Time on sale

This 2021 BMW 4 Series has been on sale for at least 162 days.

Price history

AskCar first saw this advert on 28 May 2026 at £20,900. Its asking price is now £18,700, £2,200 less. The latest price cut was seen on 28 October 2026.

Price changes recorded:

• 28 May 2026: £20,900
• 2 June 2026: £19,900
• 16 June 2026: £19,400
• 23 June 2026: £18,900
• 30 June 2026: £18,750
• 9 July 2026: £18,400
• 14 July 2026: £18,250
• 21 July 2026: £17,900
• 4 August 2026: £17,600
• 11 August 2026: £17,400
• 18 August 2026: £16,900
• 19 August 2026: £19,900
• 24 September 2026: £19,700
• 8 October 2026: £19,400
• 18 October 2026: £18,900
• 28 October 2026: £18,700

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 6 November 2026: valid until 18 March 2027.

It has had 3 MOTs. The latest, on 19 March 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 93,380 miles, which matches the advertised 93,379 miles.

Advertised mileage is about 49,300 miles higher than the median mileage of a 2021 BMW 4 Series on AskCar.