2018 BMW 3 Series

2.0 M Sport Auto 4dr (181 bhp)

£12,750

Fair price: within 8% of the typical £12,778 for this model, age and mileage, drawing on 6,811 adverts of this make and model.

Overview

Make: BMW
Model: 3 Series
Trim: M SPORT
Version: 2.0 M Sport Auto 4dr (181 bhp)
Mileage: 74,015 miles
Year: 2018
Fuel type: Petrol
Body type: Saloon
Engine: 2.0 L
Gearbox: Automatic
Power: 181 bhp
Seats: 5
Colour: Grey
Doors: 4

About this car

The advertised mileage for this 2018 BMW 3 Series M Sport is 74,015 miles. Our estimated market asking price is £12,778. This car is advertised at £12,750, which is £28 below that figure. We use UK dealer asking prices, including 6,811 BMW 3 Series listings, and account for the car’s age, mileage and specification. Since we first spotted the advert 22 days ago, the asking price has dropped by £240. You can find this car at HR Cars in Chesham.

Stock data from 20 October 2026.

How we estimate prices and check cars

Price history

First seen on 29 September 2026, 22 days ago. Advert duration calculated on 21 October 2026. Net asking-price reduction: £240 from the first recorded £12,990. 1 price reduction recorded, the latest observed on 17 October 2026.

Recorded asking prices
Date observed	Asking price
29 September 2026	£12,990
17 October 2026	£12,750
20 October 2026	£12,750

Price and mileage comparison

Estimated market asking price: £12,778. The asking price is £28 below this estimate.

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

The pricing calculation includes 6,811 adverts of this make and model across different ages and specifications.

Advertised mileage is approximately 700 miles higher than typical for a 2018 BMW 3 Series.

17 other cars with the same year, trim, gearbox and fuel are for sale from £9,800 to £28,990.

Other matching cars (up to five, cheapest first)
Asking price	Mileage
£9,800	95,772 miles
£10,378	93,710 miles
£10,995	89,920 miles
£11,000	90,639 miles
£11,890	71,852 miles

These cars have covered 15,692–107,000 miles, compared with 74,015 miles for this car.

Matching year, trim, gearbox and fuel does not mean matching mileage or every specification. Our estimate adjusts for these differences using the wider market data.

Browse all BMW 3 Series cars for sale · 2018 BMW 3 Series price guide

Similar cars for less

Dealer

HR Cars, Chesham. Across the dealer network: 82 cars for sale.

Dealer postcode: HP5 3PF.

Dealer opening hours

Monday: 09:00-19:00
Tuesday: 09:00-19:00
Wednesday: 09:00-19:00
Thursday: 09:00-19:00
Friday: 09:00-19:00
Saturday: 09:00-19:00
Sunday: 10:00-17:00