2023 BMW 3 Series 3.0 M340d MHT

Overview

• Make: BMW
• Model: 3 Series
• Version: 3.0 M340d MHT Auto 4WD Euro 6 (s/s) 4dr (335 bhp)
• Year: 2023
• Mileage: 22,921 miles
• Fuel: Diesel, mild hybrid
• Body: Saloon, 4 doors, 5 seats
• Engine: 3.0 litres, 335 bhp
• Gearbox: Automatic
• Drive: Four-wheel drive
• Colour: Grey
• CO2: 159 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2023 BMW 3 Series has covered 22,921 miles, around 11,800 fewer miles than is typical for its age. The AskCar estimate for this car is £40,033. It is priced at £37,499, which is £2,534 below that estimate. The AskCar estimate draws on 6,902 BMW 3 Series adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. We first saw this car advertised 5 days ago. Its asking price has since fallen by £500. We checked its advertised mileage against the government's MOT record, and they match. The seller is Halliwell Jones Chester BMW, based in Chester. 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

Fair price: £2,534 (6%) under the AskCar estimate of £40,033.

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 6,902 priced BMW 3 Series adverts across different ages and specifications, as of 6 November 2026.

A 2023 BMW 3 Series with the 3.0 diesel engine is typically advertised at £39,300: the median of the 70 for sale on AskCar, as of 6 November 2026.

Time on sale

AskCar first saw this 2023 BMW 3 Series advertised 5 days ago. About 4 in 10 of 2023 BMW 3 Series cars are gone from sale within a month of being advertised: 305 of the 680 first advertised between 7 July 2026 and 3 October 2026.

Price history

AskCar first saw this advert on 1 November 2026 at £37,999. Its asking price is now £37,499, £500 less. The latest price cut was seen on 4 November 2026.

Price changes recorded:

• 1 November 2026: £37,999
• 4 November 2026: £37,499

Mileage and MOT

It has had one MOT, on 22 October 2026, and passed.

There were no advisories at the latest test.

Mileage at that test: 22,922 miles, which matches the advertised 22,921 miles.

Advertised mileage is about 11,800 miles lower than the median mileage of a 2023 BMW 3 Series on AskCar.