2021 BMW 1 Series M135i

Overview

• Make: BMW
• Model: 1 Series
• Version: Auto 4WD Euro 6 5dr (301 bhp)
• Year: 2021
• Mileage: 43,673 miles
• Fuel: Petrol
• Body: Hatchback, 5 doors, 5 seats
• Engine: 301 bhp
• Gearbox: Automatic
• Drive: Four-wheel drive
• Colour: White
• CO2: 134 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

The advertised mileage for this 2021 BMW 1 Series is 43,673 miles. Priced at £16,750, this car is advertised £5,864 below the AskCar estimate of £22,614. This is a large price difference, so check the price and vehicle details with the dealer. To work out the AskCar estimate, we analyse UK dealer adverts for 7,176 BMW 1 Series cars across different ages and specifications. Since we first spotted the advert 101 days ago, the asking price has dropped by £700. The recorded MOT expired on 3 September 2026, so ask the dealer whether it has been renewed. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is AJC Car Sales, based in Benton. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 10 November 2026.

How we estimate prices and check cars

Price

Far below the going rate: £5,864 (25%) under the AskCar estimate of £22,614. Worth asking the dealer why.

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 7,176 priced BMW 1 Series adverts across different ages and specifications, as of 10 November 2026.

Time on sale

This 2021 BMW 1 Series has been on sale for at least 101 days.

Price history

AskCar first saw this advert on 1 August 2026 at £17,450. Its asking price is now £16,750, £700 less. The latest price cut was seen on 13 October 2026.

Price changes recorded:

• 1 August 2026: £17,450
• 22 August 2026: £17,250
• 9 September 2026: £16,950
• 13 October 2026: £16,750

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 10 November 2026: the latest record we hold ran out on 3 September 2026; ask the dealer for the current MOT.

It has had 2 MOTs. The latest, on 22 August 2025, passed.

There were no advisories at the latest test.

Mileage at that test: 34,742 miles, which matches the advertised 43,673 miles.

Advertised mileage is about 1,500 miles higher than the median mileage of a 2021 BMW 1 Series on AskCar.