2018 BMW 3 Series

3.0 340i M Sport Shadow Edition Auto RWD Euro 6 (s/s) 4dr (322 bhp)

£25,300

Fair price: within 8% of the typical £25,589 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 SHADOW EDITION
Version
3.0 340i M Sport Shadow Edition Auto RWD Euro 6 (s/s) 4dr (322 bhp)
Mileage
29,475 miles
Year
2018
Fuel type
Petrol
Body type
Saloon
Engine
3.0 L
Gearbox
Automatic
Power
322 bhp
Seats
5
CO2
159 g/km
Colour
Grey
Doors
4
Driven wheels
Rear Wheel Drive
Engine badge
340i
Emissions standard
Euro 6

About this car

This 2018 BMW 3 Series M Sport Shadow Edition has covered 29,475 miles, around 43,800 fewer than typical for its age. Its asking price of £25,300 is £289 below our estimate of £25,589. Our estimate draws on 6,811 BMW 3 Series adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. We first saw this car advertised 26 days ago. Its asking price has since fallen by £600. The latest MOT record shows an expiry date of 26 October 2026, with the advertised mileage consistent with the recorded reading. It is for sale at Car Planet Barnet in New Southgate.

Stock data from 20 October 2026.

How we estimate prices and check cars

Price history

First seen on 25 September 2026, 26 days ago. Advert duration calculated on 21 October 2026. Net asking-price reduction: £600 from the first recorded £25,900. 2 price reductions recorded, the latest observed on 17 October 2026.

Recorded asking prices
Date observedAsking price
25 September 2026£25,900
11 October 2026£25,600
17 October 2026£25,300
20 October 2026£25,300

Price and mileage comparison

Estimated market asking price: £25,589. The asking price is £289 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 43,800 miles lower than typical for a 2018 BMW 3 Series.

The advertised mileage is consistent with the last MOT reading.

MOT

MOT valid until 26 October 2026. 29,550 miles at the last test.

38 other cars with the same year, trim, gearbox and fuel are for sale from £8,795 to £29,995.

Other matching cars (up to five, cheapest first)
Asking priceMileage
£8,795143,221 miles
£11,42484,747 miles
£11,49093,512 miles
£11,584101,000 miles
£11,795100,000 miles

These cars have covered 15,682–143,221 miles, compared with 29,475 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

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Dealer

Car Planet Barnet, New Southgate. Across the dealer network: 2 branches, 1,886 cars for sale.

Dealer postcode: N11 1GN.

Dealer opening hours

Monday
09:00-21:00
Tuesday
09:00-21:00
Wednesday
09:00-21:00
Thursday
09:00-21:00
Friday
09:00-21:00
Saturday
09:00-21:00
Sunday
10:00-17:00

Vehicle photos