New BMW 4 Series - FrontRHS
New BMW 4 Series - RearRHS
New BMW 4 Series - RHS
New BMW 4 Series - Rear
New BMW 4 Series - Front
New BMW 4 Series - FrontLHS
New BMW 4 Series - FrontLHS_MoreSide
New BMW 4 Series - LHS
New BMW 4 Series - LHS_Elevated
New BMW 4 Series - RearLHS_Elevated

Images shown are for illustration purposes only and may not match the vehicle described below

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  • Fuel Petrol
  • Transmission Automatic
  • 0-60 8.2 secs
  • Max Speed 147 mph
  • Max Power 181 BHP
  • Efficiency 41.5 mpg
  • CO2 Emissions 155 g/km

Accessories

The following equipment is available for a new BMW 4 Series Convertible 420i M Sport 2-door Step Auto:

  • Standard Equipment
  • Available at No Cost

Option packs, the options contained in the packs, optional extra data and prices shown may not be final or confirmed by BMW. Some options and packs cannot be ordered in certain combinations. Please ensure that you confirm the specification of the vehicle prior to making a final decision to purchase.

Options and Packs

Price

  • Driver Convenience
    Active guard plus Standard
    Attentiveness assist Standard
    Auto start-stop Standard
    Bluetooth hands free facility with USB audio interface with audio streaming Standard
    BMW ConnectedDrive online services Standard
    BMW Live Cockpit Plus Nav/12.3" instrument display/14.9" display/Intelligent Voice Assist/iDrive touch/access 3rd party app/2USB/4G//bluetooth//Wi-Fi Standard
    BMW service history Standard
    BMW Teleservices Standard
    Brake pad wear indicator in front and rear Standard
    Check Control warning system for monitoring of lights and door/luggage compartment open warning Standard
    Condition based service Standard
    Electric power steering with Servotronic steering optimised at all speed ranges Standard
    Gearshift time display in manual mode Standard
    iDrive controller on centre console Standard
    Instrument cluster with speedometer with mph readout, tachometer, fuel gauge and oil temperature gauge Standard
    Integrated owners handbook Standard
    Language version English Standard
    Oil sensor for level and grade, warning by check control system Standard
    On board computer - average speed, fuel consumption, outside temp display with acoustic warning, clock/date, service interval, odometer/trip meter Standard
    Optimum shift indicator Standard
    Run flat indicator Standard
    Shifting point display Standard
    Variable sport steering Standard
    Cruise control with speed limit function No Cost
    Active cruise control with stop and go £600
    Driving assistant £800

    Passive Safety

    2 x 3-point rear seatbelts Standard
    Battery safety cut-off Standard
    BMW emergency call Standard
    Brake energy regeneration Standard
    Braking pre-tensioning Standard
    Child seat ISOFIX attachment for the two outer rear seats Standard
    Coasting in idle in ECO PRO mode Standard
    Cornering brake control (CBC) Standard
    Crash sensor activating of airbags,Unlocking doors,hazard warning lights,fuel cut off,interior lighting+activation of safety battery terminal clamp Standard
    Driver and front passenger side airbags, integrated in the door side seat backrest bolsters for all seat variants Standard
    Driver/Front Passenger airbags Standard
    Dry braking Standard
    Dynamic brake control Standard
    Dynamic stability control + (DSC+) - Anti-lock Braking System (ABS) with brake assist and cornering brake control + Automatic Stability Control (ASC) Standard
    Dynamic Traction Control - DTC Standard
    Electromechanical parking brake including automatic hold function and automatic release of the parking brake when pulling away Standard
    Electronic differential lock control (EDLC) Standard
    Front and rear ventilated brake disc Standard
    Front passenger manual airbag deactivation Standard
    Head airbags for all 4 outer seats Standard
    Hill start assistant Standard
    Seat belt security check for driver and front passenger Standard
    Seat belt with belt stopper, pyrotechnic belt tensioners and belt force limiters Standard
    Seat occupancy detection for driver and passenger side Standard
    Side impact protection Standard
    Tyre pressure monitoring with three level warning strategy Standard
    Warning triangle and first aid kit Standard
    M Sport braking system with blue painted brake calipers + M designation £625

    Security
    Alarm system (Thatcham 1) with remote control and electronic engine immobiliser Standard
    Central locking switch for all doors, fuel filler cap and luggage compartment Standard
    Locking wheel bolts Standard
    Remote control with integrated key one button open/close vehicle and windows, sole opening of the luggage compartment lid and panic mode Standard
    Start/stop button with Comfort Go keyless engine start and auto Start/stop deactivation button Standard
    Vehicle key with M specific designation Standard

    Interior Features
    12V power socket in front centre console Standard
    2 2nd row folding seats Standard
    2 front cupholder in centre console with clamping elements and matt black inlay Standard
    2 Rear seat headrests Standard
    2 zone automatic air conditioning Standard
    2nd row centre armrest with built-in cupholders Standard
    3 spoke flat bottom M sport leather multifunction steering wheel Standard
    4 pieces lashing eyelets in luggage compartment Standard
    Anthracite headlining Standard
    Armrest integrated in front and rear door trim + front centre console armrest Standard
    Battery in luggage compartment Standard
    BMW ID Standard
    Driver seat backrest width adjustment Standard
    Electric memory seats - electrically adjustable seats with drivers seat memory, exterior mirrors memory and automatic parking function Standard
    Extended storage, Luggage compartment seprating net on side trim left and right, Bag hook on both side Standard
    Front and rear door pockets Standard
    Front and rear reading lights Standard
    Front footwell lights Standard
    Front sport seats Standard
    Heated driver and front passenger seats Standard
    Height adjustable front headrests Standard
    Height adjustable mechanically and infinitely variable steering column Standard
    Illuminated armrest storage compartment Standard
    Illuminated glove compartment with separate small compartment Standard
    Luggage compartment light Standard
    Make-up mirror lights Standard
    Single front passenger seat Standard
    Storage compartment in rear centre console Standard
    Sunvisors with illuminated vanity mirrors and ticket pocket Standard
    Toolkit located in luggage compartment Standard
    Velour front floor mats Standard
    Sensatec perforated artificial leather upholstery No Cost
    Vernasca leather upholstery No Cost
    Front seats electric adjust lumbar support £225
    Heated steering wheel £250
    Vernasca leather upholstery II £325
    Crafted clarity for interior elements £425
    Warm air collar £500
    BMW Individual extended Merino leather upholstery £1,025

    Wheels
    Tyre repair kit Standard
    18" Double spoke bicolour jet black light alloy wheels - Style 848M No Cost
    19" M double spoke jet black light alloy wheels - Style 995M with mixed tyres and performance tyres £1,750
    19" M double spoke jet black light alloy wheels - Style 995M with mixed tyres and sports tyres £1,750

    Trim
    Sensatec instrument panel Standard
    Aluminium rhombicle interior trim - dashboard No Cost
    Sensatec perforated artificial leather - Black No Cost
    Sensatec perforated artificial leather - Cognac No Cost
    Sensatec perforated artificial leather - Tacora red No Cost
    Vernasca leather - Black with blue stitching No Cost
    Vernasca leather - Black with grey stitching No Cost
    Vernasca leather - Mocha with night blue stitching No Cost
    Vernasca leather - Oyster with grey stitching No Cost
    Galvanic embellisher for controls £100
    Ash grey-blue fine wood open poured interior trim - dashboard £175
    Light fine wood open pored interior trim - dashboard £175
    Vernasca leather II - Black with red stitching £325
    Carbon fibre interior trim £550
    BMW Individual extended Merino leather - Black £1,025
    BMW Individual extended Merino leather - Ivory white £1,025
    BMW individual extended Merino leather - Tartufo £1,025

    Exterior Features
    Acoustic glazing Standard
    Automatic headlight beam throw control with load dependent regulating reaction, dynamic compensation of braking dive and acceleration squat Standard
    Automatic windscreen wipers and automatic headlight Standard
    Automatically dimming electrochromatic rear view mirror Standard
    BMW emblem on engine compartment lid and tailgate Standard
    BMW kidney grille with mesh grille front side of the nuggets in matt aluminium and frame in chrome high gloss Standard
    Body colour fuel filler flap Standard
    Body colour roof fin Standard
    Brushed aluminium inserts in the front door sill finishers with BMW designation Standard
    Door sill strips Standard
    Dynamic brake lights Standard
    Electric windows - front and rear, with open/close fingertip control, anti trap facility and comfort closing function all round Standard
    Exterior mirrors - electrically folding with anti-dazzle Standard
    Fading support Standard
    Follow me home headlights Standard
    Front and rear bumper system Standard
    Front apron plastic in body colour Standard
    Green tinted heat protection glazing Standard
    High gloss shadow line exterior trim Standard
    Illuminated bow type door handles in body colour drivers side with door lock Standard
    Interior rear view electrochromatic mirror with automatic anti dazzle function Standard
    LED 3rd brake light Standard
    LED daytime running lights Standard
    LED front fog lights Standard
    LED front indicators Standard
    Licence plate panel integrated into front bumper and tailgate Standard
    Lightweight engineering Standard
    Low and high beam headlights in Bi-LED Standard
    M designation on front side panels, left and right Standard
    One piece front bumper cover including towing eye cover in body colour Standard
    Preparation for high beam assistant Standard
    Rear boot Standard
    Reversing light Standard
    Side frame decorative moulding black matt Standard
    Two part LED tailights in L-shape with components in smoked glass, brake light, LED turn indicator and rear fog light Standard
    Visible exhaust tailpipe finisher Standard
    Visible VIN plate Standard
    Welcome lights in interior and door handle area Standard
    Widened track and increased camber values for max transverse dynamics, agility and steering precision Standard
    Wind deflector Standard
    Window recess finisher strip in matt black Standard
    Windscreen wipers with integrated heated washing jets Standard
    Model designation deletion No Cost
    Model designation on right side of tailgate No Cost
    Soft top - Black No Cost
    Solid paint No Cost
    Soft top - Anthracite silver fleck £275
    Metallic paint £875
    Towbar £1,000
    BMW Individual metallic paint work £1,725
    BMW Individual frozen paint work £4,385
    BMW Individual paint - Special request £4,385

    Paintwork
    Solid - Alpine white No Cost
    Metallic - Arctic race blue £875
    Metallic - Black sapphire £875
    Metallic - Brooklyn grey £875
    Metallic - Cape york green £875
    Metallic - Fire red £875
    Metallic - Mineral white £875
    Metallic - Portimao blue £875
    BMW Individual metallic paint - Dravit grey £1,725
    BMW Individual metallic paint - Tanzanite blue £1,725
    BMW Individual frozen paint - Portimao Blue £4,385
    BMW Individual paint special - Custom £4,385

    Entertainment
    1x USB type A with data transfer and 1.5 Amp charging function in the centre console Standard
    1x USB type C with 3 Amp charging function in the front centre armrest Standard
    DAB tuner Standard
    Electronic service booklet Standard
    Personal eSim Standard
    Stereo 6 speaker system with 2 mid range speakers in the front and rear door trims + 2 central bass speakers underneath the front seats No Cost
    HiFi loudspeaker audio system £375
    Harman/Kardon surround sound audio system £850

    Engine/Drivetrain/Suspension

    8 speed automatic steptronic transmission with gearshift paddles Standard
    Balanced 50/50 weight distribution Standard
    Double joint spring strut front axle Standard
    Double VANOS Standard
    Drive performance control - ECO PRO, comfort and sport modes Standard
    High precision injection Standard
    Low centre of gravity Standard
    Petrol Particulate Filter Standard
    Stroke dependent dampers Standard
    VALVETRONIC engine management Standard
    M sport suspension No Cost
    Adaptive M suspension £450

    Connected professional package - 4 Series

    Standard
    BMW remote services
    Concierge service
    Connected music
    Connected navigation
    Connected parking assist
    In-Car experience
    Real time traffic information
    smartphone integration

    Park assist pack - 4 Series

    Standard
    Front/rear park distance control (PDC)
    Lateral parking aid
    Park assist system
    Rear view camera
    Reversing assistant

    M sport exterior styling pack - 4 Series

    Standard
    Aerodynamic component body colour front and rear bumper trim and side sills
    Rear bumper trim insert in dark shadow metallic

    Ambient lighting pack - 4 Series

    Standard
    Additionaly light carpet projects an ambient light design onto the left and right entering and exiting area
    Ambient door handle light
    Ambient interior lighting with 4 pre-defined selectable light designs including 9 colours
    Ambient lighting front and rear
    Ambient lighting in the centre console storage compartment
    Contour lighting for door trim
    Front footwell ambient lighting
    Waterfall lighting for central air vent

    Comfort pack I - 4 Series Convertible

    £900
    Comfort access system with smart opener
    Front seats electric adjust lumbar support
    Wireless charging tray

Technical Specifications

  • Combined MPG 38.2 mpg
  • CO2 Emissions 155 g/km
  • 0-60 mph 8.2 secs
  • Max Speed 147 mph
  • Max Power 181 bhp
  • Height: 1,384 mm Width: 1852 mm Width (inc. mirrors): 2,081 mm Front Scale Front Dimensions
    Wheelbase: 2,851 mm Length: 4,768 mm Side Scale Side Dimensions

  • Engine and Drive Train

    Cylinders: Bore
    82 mm
    Cylinders: Stroke
    94.6 mm
    CC
    1,998
    Cylinders
    4
    Cylinder Layout
    In-Line
    Number of Valves
    16
    Camshaft
    DOHC
    Fuel Delivery
    Turbo Injection
    Catalytic Convertor
    Yes
    Engine Layout
    North South
    Compression Ratio
    11.0:1
    Transmission
    Semi-Auto
    Gears
    8 Speed
    Engine Code
    B48B20M1

  • Performance

    0-60mph
    8.2 secs
    Top Speed
    147 mph
    Engine Power
    184 BHP/PS
    Engine Power in PS?
    Yes
    Engine Power
    135 kW
    Engine Power At
    5,000 RPM
    Engine Torque
    221 lbs/ft
    Engine Torque
    300 Nm
    Engine Torque At
    1350 RPM

  • Fuel Consumption - ICE

    EC Directive 1999/100/EC Applies
    No
    WLTP FC Low
    30.4 mpg
    WLTP FC Medium
    40.9 mpg
    WLTP FC High
    48.7 mpg
    WLTP FC Extra High
    42.8 mpg
    WLTP FC Comb
    41.5 mpg
    WLTP FC Low: Min
    30.4 mpg
    WLTP FC Low: Max
    29.4 mpg
    WLTP FC Medium: Min
    40.9 mpg
    WLTP FC Medium: Max
    39.2 mpg
    WLTP FC High: Min
    48.7 mpg
    WLTP FC High: Max
    46.3 mpg
    WLTP FC Extra High: Min
    42.8 mpg
    WLTP FC Extra High: Max
    40.9 mpg
    WLTP FC Comb: Min
    41.5 mpg
    WLTP FC Comb: Max
    38.2 mpg
    WLTP FC Low
    9.3 l/100km
    WLTP FC Medium
    6.9 l/100km
    WLTP FC High
    5.8 l/100km
    WLTP FC Extra High
    6.6 l/100km
    WLTP FC Comb
    6.8 l/100km
    WLTP FC Low: Min
    9.3 l/100km
    WLTP FC Low: Max
    9.6 l/100km
    WLTP FC Medium: Min
    6.9 l/100km
    WLTP FC Medium: Max
    7.2 l/100km
    WLTP FC High: Min
    5.8 l/100km
    WLTP FC High: Max
    6.1 l/100km
    WLTP FC Extra High: Min
    6.6 l/100km
    WLTP FC Extra High: Max
    6.9 l/100km
    WLTP FC Comb: Min
    6.8 l/100km
    WLTP FC Comb: Max
    7.4 l/100km

  • Emissions - ICE

    Standard Euro Emissions
    Euro 6
    CO
    0.237 g/km
    HC
    0.018 g/km
    NOx
    0.018 g/km
    Particles
    0.0002
    WLTP CO2 Low
    213 g/km
    WLTP CO2 Medium
    157 g/km
    WLTP CO2 High
    133 g/km
    WLTP CO2 Extra High
    150 g/km
    WLTP CO2 Comb
    155 g/km
    WLTP CO2 Low: Min
    212 g/km
    WLTP CO2 Low: Max
    219 g/km
    WLTP CO2 Medium: Min
    156 g/km
    WLTP CO2 Medium: Max
    164 g/km
    WLTP CO2 High: Min
    133 g/km
    WLTP CO2 High: Max
    139 g/km
    WLTP CO2 Extra High: Min
    150 g/km
    WLTP CO2 Extra High: Max
    158 g/km
    WLTP CO2 Comb: Max
    170 g/km
    WLTP CO2 Comb: Min
    155 g/km

  • Tyres

    Tyre Size Front
    225/45 R18
    Tyre Size Rear
    255/40 R18
    Tyre Size Spare
    Tyre Repair Kit
    Wheel Type
    18" Alloy
    Wheel Style
    Double Spoke Style 848M
    Alloys?
    Yes
    Space Saver?
    No

  • Weight and Capacities

    Minimum Kerbweight
    1,690 kg
    Gross Vehicle Weight
    2,185 kg
    Fuel Tank Capacity
    59 Litres
    Max. Towing Weight: Braked
    1,600 kg
    Max. Towing Weight: Unbraked
    750 kg
    Max. Loading Weight
    495 kg
    Luggage Capacity (Seats Up)
    385 Litres
    No. of Seats
    4
    Turning Circle: Kerb to Kerb
    11.4 m

  • General

    Standard manufacturer's warranty
    3 Years
    Standard manufacturer's warranty
    999,999 Miles
    Special Edition
    No
    Special Order
    No
    Service Interval
    18,000 Miles
    Service Interval Frequency
    24 Months
    NCAP Adult Occupant Protection %
    96
    NCAP Child Occupant Protection %
    80
    NCAP Pedestrian Protection %
    93
    NCAP Safety Assist %
    72
    NCAP Overall Rating
    5
    Badge Power
    184 BHP/PS
    Badge Engine CC
    2
    Vehicle Homologation Class
    M1
    Generation Mark
    2
    Alternative Fuel Qualifying
    No

  • Test Cycles

    Emissions Test Cycle
    WLTP
    RDE Certification Level
    RDE 2

  • Emissions - Lifecycle

    End-of-Life Emissions - CO2e (Equivalent)
    0.6 tonnes
    In-Life Emissions - CO2e (Equivalent)
    11.1 tonnes
    Lifetime Emissions - CO2e (Equivalent)
    26.3 tonnes
    Production Emissions - CO2e (Equivalent)
    14.6 tonnes

Dealer Listing

Running Costs

Calculate approximately how much a year’s worth of fuel would cost according to usage:

Efficiency

EC Urban mpg
EC Extra Urban mpg
EC Combined 38.2 mpg

Filling Up

Tank Size 59 litres
Cost to fill £79.56

Annual Estimate

Total Fuel Use 1,190.08 litres
Total Fuel Cost £1,604.82
Road Fund Licence £680.00

See important information about efficiency data.

Featured BMW 4 Series Review: ‘THE DEUTSCHLAND OPEN’

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Car and Driving’s Independent New Review of the BMW 4 Series Convertible

By Jonathan Crouch
Added 1st March, 2024

BMW’s second generation 4 Series Convertible has more appeal in this improved form. Jonathan Crouch takes a look.

Read the full article

See more reviews in our BMW 4 Series independent review section.

1 Manufacturer’s Recommended Retail Price for the base car, includes VAT, delivery from the manufacturer to the dealership, first registration fee and one year's road fund licence, and may be subject to change. See our terms and conditions of use for more information. Please check with your local centre for our best offers and further details.

Emissions and efficiency data taken from official test results, where available, when new. Data shown is intended to provide a standard figure for comparing the relative fuel economy of different vehicles of a similar age and condition, and does not represent the average fuel consumption that will be achieved on the road. Actual figures will depend on factors including the age of the vehicle, how it has been maintained, road and weather conditions and driving style.