2023 BMW 420 • Compare 119 used cars with valuation

Market overview: April-2026 Price Analysis: A used BMW 420 from 2023 currently costs between £25,950 and £35,000. On average, the mileage for this year stands at 26,774 miles. The depreciation and price trend over the last 12 months is -£2,240.

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Carwow

2022

(2022) BMW 420 M Sport 190 HP

£24,920

Good price

You save £2,180

BB1 3NU Lancashire, Lancashire

129 g CO2/km comb. - 190 HP (139 kW) - 4.9 Mpg

Carwow

2022

(2022) BMW 420 M Sport 190 HP

£24,950

Fair price

You save £950

WD3 3RT Croxley Green, Hertfordshire

130 g CO2/km comb. - 190 HP (139 kW) - 5.0 Mpg

Carwow

2023

(2023) BMW 420 M Sport 192 HP

£31,696

Super price

You save £3,204

NE36 0BQ West Boldon, Tyne And Wear

154 g CO2/km comb. - 192 HP (141 kW) - 40.4 Mpg

Carwow

2021

(2021) BMW 420 M Sport 190 HP

£26,722

Fair price

Estimated price £26,191

YO304WR, North Yorkshire

131 g CO2/km comb. - 190 HP (139 kW) - 54.3 Mpg

Price checked by AutoUncle

Super price

Good price

Fair price

A bit pricey

Expensive

-10%

1 / 4

Used (2023) BMW 420 M Sport 184 HP | Super price

- 4 Series i M Sport Pro Edition

2023
33,219 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
184 HP (135 kW)
CO2 emissions: 151 g CO2/km comb.
6.6 mpg
Details

Super price

£24,399

£27,249

E4 7PX Greater London, London

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Availability verified

-20%

1 / 4

Used (2023) BMW 420 M Sport 192 HP | Super price

4 Series i xDrive M Sport Coupe

2023
14,085 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
192 HP (141 kW)
CO2 emissions: 154 g CO2/km comb.
40.4 mpg
Details

Super price

£31,696

£39,950

NE36 0BQ West Boldon, Tyne And Wear

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Availability verified

-3%

1 / 4

Used (2023) BMW 420 M Sport 184 HP | Super price

- 4 Series i M Sport Pro Edition

2023
45,612 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
184 HP (135 kW)
CO2 emissions: 151 g CO2/km comb.
6.6 mpg
Details

Super price

£23,149

£24,099

DE21 6BZ Derby, Derbyshire

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Availability verified

-3%

1 / 4

Used (2023) BMW 420 M Sport 184 HP | Good price

4 Series SERIES i M Sport 5dr Step

2023
19,126 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
184 HP (135 kW)
Details

Good price

£28,990

£29,990

Honestjohn

WC1E 7DP Greater London, London

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Carwow

2022

(2022) BMW 420 M Sport 190 HP

£28,116

Fair price

Estimated price £26,993

PE30 Norfolk, Norfolk

131 g CO2/km comb. - 190 HP (139 kW) - 5.0 Mpg

Carwow

2022

(2022) BMW 420 M Sport 184 HP

£28,928

Fair price

Estimated price £27,783

NE36 0BQ West Boldon, Tyne And Wear

154 g CO2/km comb. - 184 HP (135 kW) - 42.0 Mpg

Carwow

2023

(2023) BMW 420 M Sport 184 HP

£28,199

Fair price

You save £701

CW7 Cheshire West And Chester, Cheshire

154 g CO2/km comb. - 184 HP (135 kW) - 6.8 Mpg

Carwow

2025

(2025) BMW 420 M Sport 184 HP

£35,199

Super price

You save £4,001

BB12 6EH Lancashire, Lancashire

153 g CO2/km comb. - 184 HP (135 kW) - 6.6 Mpg

-22%

1 / 4

Used (2023) BMW 420 M Sport 181 HP | Super price

4 Series i M Sport Coupe 2.0

2023
30,749 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 151 g CO2/km comb.
42.8 mpg
Details

Super price

£26,499

£33,999

Bmw.co.uk

SK9 3PB Handforth, Cheshire

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1 / 4

Used (2023) BMW 420 M Sport 184 HP | Good price

4 Series 2.0 i M Sport Coupe 2dr

2023
9,213 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
184 HP (135 kW)
Details

Good price

£27,650

£27,750

Motors.co.uk

CM1 3BH Essex, Essex

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-2%

1 / 4

Used (2023) BMW 420 M Sport 184 HP | Good price

4 Series Gran Coupe i M Sport 5dr

Nov 2023
7,355 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
184 HP (135 kW)
CO2 emissions: 154 g CO2/km comb.
Details

Good price

£31,995

£32,795

Dealer

IP1 6JZ Suffolk, Suffolk

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-3%

1 / 4

Used (2023) BMW 420 M Sport 187 HP | Good price

4 Series Gran Coupe d MHT M Sport

2023
50,954 miles
Trim level: M Sport
2.0L Diesel
Coupe
Automatic
187 HP (137 kW)
Details

Good price

£26,500

£27,500

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-6%

1 / 4

Used (2023) BMW 420 M Sport 180 HP | Good price

4 Series Gran Coupe i M Sport 5dr

2023
19,772 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
180 HP (132 kW)
Details

Good price

£31,931

£33,990

Buyacar

Delivered to you

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-5%

1 / 4

Used (2023) BMW 420 M Sport | Super price

4 Series i M Sport 5dr Step

2023
74,811 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
Details

Super price

£21,550

£22,800

Motors.co.uk

N11 1GN Greater London, London

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Carwow

2025

(2025) BMW 420 M Sport 184 HP

£35,890

Super price

You save £3,210

CT2 7PX Kent, Kent

146 g CO2/km comb. - 184 HP (135 kW) - 44.1 Mpg

Carwow

2025

(2025) BMW 420 M Sport 184 HP

£34,149

Super price

You save £4,451

DE21 6BZ Derby, Derbyshire

153 g CO2/km comb. - 184 HP (135 kW) - 6.6 Mpg

Carwow

2022

(2022) BMW 420 M Sport 190 HP

£26,299

Super price

You save £3,001

NP19 4YR Newport, Gwent

122 g CO2/km comb. - 190 HP (139 kW) - 4.7 Mpg

Carwow

2025

(2025) BMW 420 M Sport 184 HP

£28,700

Super price

You save £5,600

CM1 3BH Essex, Essex

154 g CO2/km comb. - 184 HP (135 kW) - 6.8 Mpg

-4%

1 / 4

Used (2023) BMW 420 M Sport 180 HP | Super price

4 Series i M Sport 2dr Step

2023
29,340 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
180 HP (132 kW)
Details

Super price

£27,205

£28,500

Buyacar

Delivered to you

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-26%

1 / 4

Used (2023) BMW 420 M Sport 181 HP | Good price

4 Series i M Sport 5dr Step

2023
31,255 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
Details

Good price

£28,545

£39,000

Honestjohn

WC1E 7DP Greater London, London

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-5%

1 / 4

Used (2023) BMW 420 M Sport | Good price

4 Series i M Sport Convertible

2023
36,531 miles
Trim level: M Sport
2.0L Petrol
Cabriolet
Automatic
Details

Good price

£28,700

£30,500

Motors.co.uk

CM1 3BH Essex, Essex

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-1%

1 / 4

Used (2023) BMW 420 M Sport 184 HP | Good price

4 Series SERIES i M Sport 2dr Step

2023
7,125 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
184 HP (135 kW)
Details

Good price

£29,999

£30,499

Honestjohn

WC1E 7DP Greater London, London

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-2%

1 / 3

Used (2023) BMW 420 M Sport 187 HP | Good price

4 Series Convertible d MHT M Sport

2023
12,678 miles
Trim level: M Sport
2.0L Hybrid
Cabriolet
Automatic
187 HP (137 kW)
Details

Good price

£32,800

£33,700

Honestjohn

AB12 3EW Torry, Aberdeen

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-3%

1 / 4

Used (2023) BMW 420 M Sport 181 HP | Good price

4 Series i M Sport Coupe 2.0

2023
18,993 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 146 g CO2/km comb.
44.1 mpg
Details

Good price

£28,250

£29,340

Motors.co.uk

DA14 5BG Sidcup, London

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-16%

1 / 4

Used (2023) BMW 420 M Sport 184 HP | Super price

4 Series i M Sport Coupe 2.0

2023
19,813 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
184 HP (135 kW)
CO2 emissions: 151 g CO2/km comb.
42.8 mpg
Details

Super price

£28,790

£34,490

Buyacar

Delivered to you

View the car

-16%

1 / 4

Used (2023) BMW 420 M Sport 181 HP | Good price

4 Series i M Sport Coupe 2.0

2023
17,500 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 151 g CO2/km comb.
42.8 mpg
Details

Good price

£29,290

£34,990

Bmw.co.uk

SK4 2JZ Greater Manchester, Manchester

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-2%

1 / 4

Used (2023) BMW 420 M Sport 184 HP | Good price

4 Series 2.0 i M Sport Coupe 2dr

2023
30,303 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
184 HP (135 kW)
Details

Good price

£26,700

£27,500

Exchange and Mart

Kent, Kent

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-7%

1 / 4

Used (2023) BMW 420 M Sport | Super price

4 Series i M Sport 5dr Step

2023
25,916 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
Details

Super price

£26,849

£28,999

Motors.co.uk

BB12 6EH Lancashire, Lancashire

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Carwow

2023

(2023) BMW 420 M Sport 184 HP

£24,399

Super price

You save £3,101

E4 7PX Greater London, London

151 g CO2/km comb. - 184 HP (135 kW) - 6.6 Mpg

Carwow

2021

(2021) BMW 420 M Sport 190 HP

£23,699

Fair price

You save £401

E4 7PX Greater London, London

128 g CO2/km comb. - 190 HP (139 kW) - 4.8 Mpg

Carwow

2022

(2022) BMW 420 M Sport 184 HP

£23,819

Fair price

You save £881

YO304WR, North Yorkshire

154 g CO2/km comb. - 184 HP (135 kW) - 41.5 Mpg

Carwow Leasing

2025

(2025) BMW 420 M Sport 184 HP

£46,336

Good price

You save £2,464

RH10 1TN West Sussex, West Sussex

153 g CO2/km comb. - 184 HP (135 kW) - 6.6 Mpg

-25%

1 / 3

Used (2023) BMW 420 M Sport 190 HP | Good price

4 Series d M Sport Convertible 2.0

2023
12,678 miles
Trim level: M Sport
2.0L Diesel
Cabriolet
Automatic
190 HP (139 kW)
CO2 emissions: 136 g CO2/km comb.
54.3 mpg
Details

Good price

£32,800

£44,000

Bmw.co.uk

AB12 3EW Aberdeen, Aberdeen

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-7%

1 / 4

Used (2023) BMW 420 M Sport | Super price

4 Series i M Sport 2dr Step

2023
30,526 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
Details

Super price

£26,249

£28,299

Motors.co.uk

B6 5SU West Midlands, West Midlands

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-6%

1 / 4

Used (2023) BMW 420 M Sport | Super price

4 Series i M Sport 5dr Step

2023
13,071 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
Details

Super price

£28,349

£30,449

Motors.co.uk

B6 5SU West Midlands, West Midlands

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-4%

1 / 4

Used (2023) BMW 420 M Sport | Super price

4 Series i M Sport 5dr Step

2023
23,446 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
Details

Super price

£27,849

£29,249

Motors.co.uk

E4 7PX Greater London, London

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-6%

1 / 4

Used (2023) BMW 420 M Sport 190 HP | Super price

4 Series d MHT M Sport 5dr Step

Jan 2023
25,403 miles
Trim level: M Sport
2.0L Diesel
Coupe
Automatic
190 HP (139 kW)
CO2 emissions: 130 g CO2/km comb.
Details

Super price

£28,990

£30,990

Dealer

Bmw, Dumfriesshire

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Carwow

2023

(2023) BMW 420 M Sport 184 HP

£23,149

Super price

You save £2,851

DE21 6BZ Derby, Derbyshire

151 g CO2/km comb. - 184 HP (135 kW) - 6.6 Mpg

Carwow

2023

(2023) BMW 420 M Sport 184 HP

£22,490

Fair price

You save £910

DL1 2LD Darlington, Durham

154 g CO2/km comb. - 184 HP (135 kW) - 6.8 Mpg

Carwow

2022

(2022) BMW 420 M Sport 190 HP

£22,995

Fair price

Estimated price £21,845

YO322RJ

131 g CO2/km comb. - 190 HP (139 kW) - 5.0 Mpg

Carwow

2025

(2025) BMW 420 M Sport 184 HP

£36,677

Good price

You save £1,723

TS18 3RB, Durham

153 g CO2/km comb. - 184 HP (135 kW) - 42.0 Mpg

Showing 1 - 25 of 115 results

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See BMW 420

BMW 420 (1000+)