2018 BMW 420 • Compare 141 used cars with valuation

Market overview: April-2026 Price Analysis: A used BMW 420 from 2018 currently costs between £11,960 and £18,250. On average, the mileage for this year stands at 65,039 miles. The depreciation and price trend over the last 12 months is -£440.

Featured deals

Verified Dealers

Become a verified dealer

Carwow

2020

(2020) BMW 420 M Sport 184 HP

£17,890

Fair price

Estimated price £17,466

NE8 3HL Tyne And Wear, Tyne And Wear

170 g CO2/km comb. - 184 HP (135 kW) - 7.4 Mpg

Carwow

2020

(2020) BMW 420 M Sport 190 HP

£16,915

Good price

You save £1,385

E6 5LU Greater London, London

149 g CO2/km comb. - 190 HP (139 kW) - 5.7 Mpg

Carwow

2020

(2020) BMW 420 Sport Line 190 HP

£13,500

Good price

You save £2,100

W5 5JN Greater London, London

161 g CO2/km comb. - 190 HP (139 kW) - 5.9 Mpg

Carwow

2020

(2020) BMW 420 M Sport 184 HP

£15,999

Super price

You save £3,201

SO150LP, Hampshire

182 g CO2/km comb. - 184 HP (135 kW) - 8.0 Mpg

Price checked by AutoUncle

Super price

Good price

Fair price

A bit pricey

Expensive

-3%

1 / 4

Used (2018) BMW 420 M Sport | Good price

4 Series d [190] M Sport 2dr Auto

2018
73,791 miles
Trim level: M Sport
2.0L Diesel
Coupe
Automatic
Details

Good price

£12,995

£13,495

Motors.co.uk

PE8 5PB Oundle, Northamptonshire

View the car

-4%

1 / 4

Used (2018) BMW 420 Sport Line 184 HP | Super price

4 Series i Sport 2dr Auto

2018
48,230 miles
Trim level: Sport Line
2.0L Petrol
Coupe
Automatic
184 HP (135 kW)
Details

Super price

£13,700

£14,300

Motors.co.uk

CV11 6SQ Warwickshire, Warwickshire

View the car

-4%

1 / 4

Used (2018) BMW 420 M Sport 190 HP | Good price

4 Series d [190] xDrive M Sport

2018
60,857 miles
Trim level: M Sport
2.0L Diesel
Coupe
Automatic
190 HP (139 kW)
Details

Good price

£14,250

£14,850

Motors.co.uk

DE65 5FJ Hilton, Derbyshire

View the car

-4%

1 / 4

Used (2018) BMW 420 Sport Line 190 HP | Super price

4 Series d [190] Sport 2dr Auto

2018
49,671 miles
Trim level: Sport Line
2.0L Diesel
Coupe
Automatic
190 HP (139 kW)
CO2 emissions: 124 g CO2/km comb.
mpg: 60.1
Details

Super price

£13,998

£14,698

Dealer

CW7 3DB Cheshire West And Chester, Cheshire

View the car

Featured deals

Verified Dealers

Carwow

2020

(2020) BMW 420 M Sport 190 HP

£16,290

Fair price

You save £710

W1H7AB

151 g CO2/km comb. - 190 HP (139 kW) - 5.8 Mpg

Carwow

2020

(2020) BMW 420 M Sport 190 HP

£16,667

Good price

You save £2,133

E6 5LU Greater London, London

156 g CO2/km comb. - 190 HP (139 kW) - 5.9 Mpg

Carwow

2020

(2020) BMW 420 M Sport 190 HP

£15,349

Super price

You save £2,651

E6 5LU Greater London, London

156 g CO2/km comb. - 190 HP (139 kW) - 5.9 Mpg

Carwow

2019

(2019) BMW 420 Sport Line 190 HP

£16,490

Fair price

You save £610

NE8 3HL Tyne And Wear, Tyne And Wear

156 g CO2/km comb. - 190 HP (139 kW) - 5.8 Mpg

-7%

1 / 4

Used (2018) BMW 420 M Sport | Good price

4 Series d [190] M Sport 2dr Auto

2018
77,000 miles
Trim level: M Sport
2.0L Diesel
Coupe
Automatic
Details

Good price

£12,995

£13,995

Motors.co.uk

RM4 1UH Abridge, Essex

View the car

-4%

1 / 4

Used (2018) BMW 420 M Sport | Good price

4 Series d [190] M Sport 2dr Auto

2018
103,000 miles
Trim level: M Sport
2.0L Diesel
Coupe
Automatic
Details

Good price

£11,490

£11,990

Motors.co.uk

CR4 4BE Greater London, London

View the car

-4%

1 / 4

Used (2018) BMW 420 M Sport | Super price

4 Series i M Sport 5dr Auto

2018
61,200 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
Details

Super price

£11,995

£12,495

Motors.co.uk

S4 8AQ South Yorkshire, South Yorkshire

View the car

-4%

1 / 3

Used (2018) BMW 420 M Sport | Good price

4 Series 2.0 d M Sport Auto

2018
60,806 miles
Trim level: M Sport
2.0L Diesel
Coupe
Automatic
Details

Good price

£14,050

£14,700

Motors.co.uk

DE65 5FJ Hilton, Derbyshire

View the car

-6%

1 / 4

Used (2018) BMW 420 Sport Line | Good price

4 Series i xDrive Sport 5dr Auto

2018
42,000 miles
Trim level: Sport Line
2.0L Petrol
Coupe
Automatic
Details

Good price

£14,995

£15,995

Motors.co.uk

LU2 0JD Luton, Bedfordshire

View the car

-29%

1 / 4

Used (2018) BMW 420 Sport Line 181 HP | Good price

i Sport Coupe

2018
25,250 miles
Trim level: Sport Line
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 134 g CO2/km comb.
mpg: 48.7
Details

Good price

£16,980

£23,982

Bmw.co.uk

BR1 2NE Greater London, London

View the car

Featured deals

Verified Dealers

Carwow

2019

(2019) BMW 420 M Sport 190 HP

£15,440

Fair price

Estimated price £15,398

G3 6ED Glasgow City, Glasgow

149 g CO2/km comb. - 190 HP (139 kW) - 5.7 Mpg

Carwow

2020

(2020) BMW 420 M Sport 190 HP

£13,990

Fair price

You save £1,010

PE20 3JN Swineshead, Lincolnshire

149 g CO2/km comb. - 190 HP (139 kW) - 5.7 Mpg

Carwow

2020

(2020) BMW 420 M Sport 190 HP

£14,197

Fair price

You save £503

S70 5SZ Birdwell, South Yorkshire

149 g CO2/km comb. - 190 HP (139 kW) - 5.7 Mpg

Carwow

2020

(2020) BMW 420 M Sport 184 HP

£16,995

Super price

You save £3,605

S80 2QD Nottinghamshire, Nottinghamshire

182 g CO2/km comb. - 184 HP (135 kW) - 8.0 Mpg

-5%

1 / 4

Used (2018) BMW 420 M Sport | Super price

4 Series d [190] M Sport 2dr Auto

2018
109,926 miles
Trim level: M Sport
2.0L Diesel
Coupe
Automatic
Details

Super price

£9,995

£10,530

Motors.co.uk

SK8 2PN Greater Manchester, Manchester

View the car

-9%

1 / 4

Used (2018) BMW 420 M Sport 190 HP | Good price

4 Series d [190] M Sport 2dr Auto

2018
54,000 miles
Trim level: M Sport
2.0L Diesel
Coupe
Automatic
190 HP (139 kW)
Details

Good price

£14,495

£15,995

Motors.co.uk

PL14 4LA Moorswater, Cornwall

View the car

1 / 3

Used (2018) BMW 420 M Sport 190 HP | Good price

4 Series d [190] M Sport 5dr Auto

2018
83,157 miles
Trim level: M Sport
2.0L Diesel
Coupe
Automatic
190 HP (139 kW)
Details

Good price

£11,990

Motors.co.uk

S71 1NU South Yorkshire, South Yorkshire

View the car

1 / 4

Used (2018) BMW 420 M Sport 190 HP | Good price

4 Series 2.0 d M Sport Coupe 2dr

2018
61,000 miles
Trim level: M Sport
2.0L Diesel
Coupe
Automatic
190 HP (139 kW)
Details

Good price

£14,000

£13,000

Motors.co.uk

M4 6BQ Greater Manchester, Manchester

View the car

1 / 4

Used (2018) BMW 420 M Sport | Good price

4 Series d [190] M Sport 5dr Auto

2018
55,663 miles
Trim level: M Sport
2.0L Diesel
Coupe
Automatic
Details

Good price

£14,250

Motors.co.uk

L40 8JW Burscough, Lancashire

View the car

-1%

Used (2018) BMW 420 Sport Line 181 HP | Good price

4 Series 2018 | 2.0 i Sport Auto

2018
56,658 miles
Trim level: Sport Line
2.0L Petrol
Automatic
181 HP (133 kW)
Details

Good price

£13,300

£13,500

Dealer

In Preparation, Dumfriesshire

View the car

-4%

1 / 4

Used (2018) BMW 420 M Sport 190 HP | Fair price

4 Series 2.0 d M Sport Coupe 2dr

2018
95,145 miles
Trim level: M Sport
2.0L Diesel
Coupe
Automatic
190 HP (139 kW)
Details

Fair price

£11,995

£12,495

Motors.co.uk

CO16 0HH Thorpe-Le-Soken, Essex

View the car

-3%

Used (2018) BMW 420 M Sport 184 HP | Fair price

4 Series i M Sport 5dr Auto

2018
61,261 miles
Trim level: M Sport
2.0L Petrol
Hatchback
Automatic
184 HP (135 kW)
CO2 emissions: 139 g CO2/km comb.
mpg: 38
Details

Fair price

£14,369

£14,885

Dealer

DE21 4SX Derby, Derbyshire

View the car

-2%

1 / 4

Used (2018) BMW 420 M Sport 190 HP | Fair price

4 Series d [190] M Sport 2dr Auto

2018
43,167 miles
Trim level: M Sport
2.0L Diesel
Coupe
Automatic
190 HP (139 kW)
CO2 emissions: 124 g CO2/km comb.
mpg: 60.1
Details

Fair price

£16,998

£17,498

Dealer

LS8 5QP West Yorkshire, West Yorkshire

View the car

-1%

1 / 3

Used (2018) BMW 420 M Sport | Fair price

4 Series d [190] M Sport 2dr Auto

2018
43,626 miles
Trim level: M Sport
2.0L Diesel
Cabriolet
Automatic
Details

Fair price

£16,667

£16,871

Motors.co.uk

RM13 8RH Greater London, London

View the car

Featured deals

Verified Dealers

Carwow

2020

(2020) BMW 420 M Sport 190 HP

£14,697

Fair price

You save £503

DN31 2SU North East Lincolnshire, Lincolnshire

149 g CO2/km comb. - 190 HP (139 kW) - 5.7 Mpg

Carwow

2020

(2020) BMW 420 M Sport 190 HP

£13,750

Fair price

You save £450

SK1 3JG Greater Manchester, Manchester

149 g CO2/km comb. - 190 HP (139 kW) - 5.7 Mpg

Carwow

2020

(2020) BMW 420 M Sport 190 HP

£15,850

Good price

You save £1,450

WR9 7DZ Worcestershire, Worcestershire

149 g CO2/km comb. - 190 HP (139 kW) - 5.7 Mpg

Carwow

2020

(2020) BMW 420 M Sport 190 HP

£16,140

Fair price

You save £160

W1H 7AB Greater London, London

160 g CO2/km comb. - 190 HP (139 kW) - 6.1 Mpg

New

1 / 4

Used (2018) BMW 420 M Sport | Fair price

4 Series i M Sport 5dr Auto

2018
85,000 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
Details

Fair price

£12,995

Motors.co.uk

CO16 0HH Thorpe-Le-Soken, Essex

View the car

-1%

1 / 4

Used (2018) BMW 420 M Sport | Fair price

4 Series d [190] xDrive M Sport

2018
42,481 miles
Trim level: M Sport
2.0L Diesel
Coupe
Automatic
Details

Fair price

£17,399

£17,649

Motors.co.uk

IP1 2DZ Ipswich, Suffolk

View the car

New

1 / 1

Used (2018) BMW 420 M Sport | Fair price

4 Series d [190] M Sport 5dr Auto

2018
109,000 miles
Trim level: M Sport
2.0L Diesel
Coupe
Automatic
Details

Fair price

£11,490

Motors.co.uk

S65 4HH Dalton, South Yorkshire

View the car

-2%

1 / 4

Used (2018) BMW 420 M Sport 187 HP | Fair price

4 Series d xDrive M Sport Coupe

2018
41,500 miles
Trim level: M Sport
2.0L Diesel
Coupe
Automatic
187 HP (137 kW)
CO2 emissions: 136 g CO2/km comb.
mpg: 44.1
Details

Fair price

£17,490

£17,990

Bmw.co.uk

SK4 2JZ Greater Manchester, Manchester

View the car

1 / 4

Used (2018) BMW 420 M Sport | Fair price

4 Series d [190] xDrive M Sport

2018
95,600 miles
Trim level: M Sport
2.0L Diesel
Coupe
Automatic
Details

Fair price

£13,500

Motors.co.uk

RM15 4YD Purfleet-On-Thames, Essex

View the car

Featured deals

Verified Dealers

Carwow

2020

(2020) BMW 420 Sport Line 190 HP

£12,995

Fair price

Estimated price £12,042

DE73 7HL Stenson, Derbyshire

156 g CO2/km comb. - 190 HP (139 kW) - 5.8 Mpg

Carwow

2019

(2019) BMW 420 M Sport 190 HP

£17,149

Fair price

Estimated price £16,717

TD9 8PZ Scottish Borders, Roxburghshire

149 g CO2/km comb. - 190 HP (139 kW) - 5.7 Mpg

Carwow

2020

(2020) BMW 420 M Sport 190 HP

£14,000

Fair price

Estimated price £13,154

CM94LL

151 g CO2/km comb. - 190 HP (139 kW) - 5.8 Mpg

Carwow

2020

(2020) BMW 420 M Sport 190 HP

£12,895

Fair price

You save £505

OL9 6HT Greater Manchester, Manchester

149 g CO2/km comb. - 190 HP (139 kW) - 5.7 Mpg

Showing 1 - 25 of 142 results

Price checked by AutoUncle

Super price

Good price

Fair price

A bit pricey

Expensive

See BMW 420

BMW 420 (1000+)