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2021 (71) BMW 4 Series 420i M Sport 2dr Step Auto

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Located at Glasgow BMW

Only £29,898
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Featured specification

Standard specification

Driver Convenience

Active guard plusAttentiveness assist
Auto start-stopBluetooth hands free facility with USB audio interface with audio streaming
BMW ConnectedDrive online servicesBMW Live Cockpit Professional Nav with 12.3" instrument display + 10.25" display, Intelligent Voice Assist, BMW OS 7, HDD, 2USB, 4G LTE connect
BMW service historyBMW Teleservices
Brake pad wear indicator in front and rearCheck Control warning system for monitoring of lights and door/luggage compartment open warning
Condition based serviceCruise control with brake assist
Electric power steering with Servotronic steering optimised at all speed rangesGearshift time display in manual mode
iDrive controller on centre consoleInstrument cluster with speedometer with mph readout, tachometer, fuel gauge and oil temperature gauge
Integrated owners handbookOil sensor for level and grade, warning by check control system
On board computer - average speed, fuel consumption, outside temp display with acoustic warning, clock/date, service interval, odometer/trip meterOptimum shift indicator
Reverse Assistant functionality for BMW Live Cockpit Professional NavTouch control functionality for BMW Live Cockpit Professional Nav
Variable sport steering 


8 speed automatic steptronic transmission with gearshift paddlesBalanced 50/50 weight distribution
Double VANOSDrive performance control - ECO PRO, comfort and sport modes
High precision injectionLow centre of gravity
M sport suspensionPetrol Particulate Filter
Stroke dependent dampersVALVETRONIC engine management


DAB tunerElectronic service booklet

Exterior Features

3rd brake lightAcoustic glazing
Automatic headlight beam throw control with load dependent regulating reaction, dynamic compensation of braking dive and acceleration squatAutomatic windscreen wipers and automatic headlight
Automatically dimming electrochromatic rear view mirrorBMW emblem on engine compartment lid and tailgate
BMW kidney grille with mesh grille front side of the nuggets in matt aluminium and frame in chrome high glossBody colour fuel filler flap
Body colour M sport rear spoilerBody colour roof fin
Brushed aluminium inserts in the front door sill finishers with BMW designationDaytime running lights
Dynamic brake lightsElectric windows - front and rear, with open/close fingertip control, anti trap facility and comfort closing function all round
Exhaust tailpipe - split left and rightExterior mirrors - electrically folding with anti-dazzle
Fading supportFront and rear bumper system
Front apron plastic in body colourGreen tinted heat protection glazing
High gloss shadow line exterior trimIlluminated bow type door handles in body colour drivers side with door lock
Interior rear view electrochromatic mirror with automatic anti dazzle functionLED front fog lights
Licence plate panel integrated into front bumper and tailgateLightweight engineering
M designation on front side panels, left and rightModel designation on right side of tailgate
One piece front bumper cover including towing eye cover in body colourPreparation for high beam assistant
Rear bootSide frame decorative moulding black matt
Two part LED tailights in L-shape with components in smoked glass, brake light, LED turn indicator and rear fog lightVisible VIN plate
Welcome lights in interior and door handle areaWidened track and increased camber values for max transverse dynamics, agility and steering precision
Window recess cover black high glossWindscreen wipers with integrated washing jets

Interior Features

12V power socket in front centre console2 front cupholder in centre console with clamping elements and matt black inlay
2 Rear seat headrests2 seat bench in second row
3 spoke M sport leather multifunction steering wheel3 zone automatic air conditioning
4 pieces lashing eyelets in luggage compartment40:20:40 split folding rear seat and rear centre armrest with two cupholders
Ambient lighting with welcome carpet lightAnthracite headlining
Armrest integrated in front and rear door trim + front centre console armrestFour grab handles integrated in roof lining
Front and rear door exit lighting (left / right)Front and rear door pockets
Front and rear footwell lightsFront and rear reading lights
Front headrestsFront passenger seat
Front seat backrest width adjustmentFront sport seats
Heated driver and front passenger seatsHeight adjustable mechanically and infinitely variable steering column
Illuminated armrest storage compartmentIlluminated glove compartment with separate small compartment
Luggage compartment lightMake-up mirror lights
Storage compartment in rear centre consoleSunvisors with vanity mirrors and ticket pocket
Toolkit located in luggage compartmentVelour front floor mats
Vernasca leather upholstery 


Connected professional package - 4 SeriesM sport exterior styling pack - 4 Series
Park assist pack - 4 Series 

Passive Safety

2 x 3-point rear seat beltsBattery safety cut-off
BMW emergency callBrake energy regeneration
Braking pre-tensioningChild seat ISOFIX attachment for the two outer rear seats
Coasting in idle in ECO PRO modeCornering brake control (CBC)
Crash sensor activating of airbags,Unlocking doors,hazard warning lights,fuel cut off,interior lighting+activation of safety battery terminal clampDriver and front passenger side airbags, integrated in the door side seat backrest bolsters for all seat variants
Driver/Front Passenger airbagsDry braking
Dynamic brake controlDynamic stability control + (DSC+) - Anti-lock Braking System (ABS) with brake assist and cornering brake control + Automatic Stability Control (ASC)
Dynamic Traction Control - DTCElectromechanical parking brake including automatic hold function and automatic release of the parking brake when pulling away
Electronic differential lock control (EDLC)Front and rear ventilated brake disc
Front passenger manual airbag deactivationHead airbags for all 4 outer seats
Hill start assistantSeat belt security check for driver and front passenger
Seat belt with belt stopper, pyrotechnic belt tensioners and belt force limitersSide impact protection
Tyre pressure monitoring with three level warning strategyWarning triangle and first aid kit


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


Sensatec instrument panel 


Reduced rolling resistance tyres
The vehicle information above was correct at time of manufacture. Please speak to the dealership for full current specification.

Technical specification

Emissions - ICE

Standard Euro EmissionsEURO 6WLTP - CO2 (g/km) - Comb146
WLTP - CO2 (g/km) - Comb - TEH153WLTP - CO2 (g/km) - Comb - TEL146
WLTP - CO2 (g/km) - Extra High140WLTP - CO2 (g/km) - Extra High - TEH147
WLTP - CO2 (g/km) - Extra High - TEL140WLTP - CO2 (g/km) - High126
WLTP - CO2 (g/km) - High - TEH133WLTP - CO2 (g/km) - High - TEL126
WLTP - CO2 (g/km) - Low201WLTP - CO2 (g/km) - Low - TEH211
WLTP - CO2 (g/km) - Low - TEL201WLTP - CO2 (g/km) - Medium148
WLTP - CO2 (g/km) - Medium - TEH156WLTP - CO2 (g/km) - Medium - TEL148

Engine and Drive Train

CamshaftDOHCCatalytic ConvertorTrue
CC1998Compression Ratio11.0:1
Cylinder LayoutIN-LINECylinders4
Cylinders - Bore (mm)82Cylinders - Stroke (mm)94.6
Engine CodeB48B20M1Engine LayoutNORTH SOUTH
Number of Valves16TransmissionSEMI-AUTO

Fuel Consumption - ICE

WLTP - FC (l/100km) - Comb6.4WLTP - FC (l/100km) - Comb - TEH6.7
WLTP - FC (l/100km) - Comb - TEL6.4WLTP - FC (l/100km) - Extra High6.2
WLTP - FC (l/100km) - Extra High - TEH6.5WLTP - FC (l/100km) - Extra High - TEL6.2
WLTP - FC (l/100km) - High5.5WLTP - FC (l/100km) - High - TEH5.9
WLTP - FC (l/100km) - High - TEL5.5WLTP - FC (l/100km) - Low8.8
WLTP - FC (l/100km) - Low - TEH9.3WLTP - FC (l/100km) - Low - TEL8.8
WLTP - FC (l/100km) - Medium6.5WLTP - FC (l/100km) - Medium - TEH6.9
WLTP - FC (l/100km) - Medium - TEL6.5WLTP - MPG - Comb44.1
WLTP - MPG - Comb - TEH42.2WLTP - MPG - Comb - TEL44.1
WLTP - MPG - Extra High45.6WLTP - MPG - Extra High - TEH43.5
WLTP - MPG - Extra High - TEL45.6WLTP - MPG - High51.4
WLTP - MPG - High - TEH47.9WLTP - MPG - High - TEL51.4
WLTP - MPG - Low32.1WLTP - MPG - Low - TEH30.4
WLTP - MPG - Low - TEL32.1WLTP - MPG - Medium43.5
WLTP - MPG - Medium - TEH40.9WLTP - MPG - Medium - TEL43.5


Badge Engine CC2.0Badge Power184
Coin DescriptioniCoin SeriesM Sport
Generation Mark2Insurance Group 1 - 50 Effective January 0730E
Service Interval Frequency - Months24Service Interval Mileage18000
Standard manufacturers warranty - Mileage999999Standard manufacturers warranty - Years3
Vehicle Homologation ClassM1 


0 to 62 mph (secs)7.5Engine Power - BHP184
Engine Power - KW135Engine Power - PSTrue
Engine Power - RPM5000Engine Torque - LBS.FT221
Engine Torque - MKG30.6Engine Torque - NM300
Engine Torque - RPM1350Top Speed149

Test Cycles

Emissions Test CycleWLTPRDE Certification LevelRDE 2


Alloys?TrueTyre Size Front225/45 R18
Tyre Size Rear225/45 R18Tyre Size SpareTYRE REPAIR KIT
Wheel StyleDOUBLE SPOKE STYLE 848MWheel Type18" ALLOY

Vehicle Dimensions

Width (including mirrors)2081 

Weight and Capacities

Fuel Tank Capacity (Litres)59Gross Vehicle Weight2015
Luggage Capacity (Seats Up)440Max. Loading Weight490
Max. Roof Load75Max. Towing Weight - Braked1600
Max. Towing Weight - Unbraked750Minimum Kerbweight1525
No. of Seats4Turning Circle - Kerb to Kerb11.4
The vehicle information above was correct at time of manufacture. Please speak to the dealership for full current specification.

Independent review

Review courtesy of Car and Driving

BMW 4 Series Coupe

The second generation version of BMW's 4 Series Coupe has been usefully updated. Jonathan Crouch takes a look.

Ten Second Review

The improved version of BMW's second generation 4 Series Coupe is these days much more its own model, with an even more distinctive look and a sporting dynamic feel. Inside, there's now more media tech and an even plusher cabin. The range has been severely slimmed down in this updated form, but for brand enthusiasts, there's still plenty to like.


The BMW 4 Series Coupe. It's just a two-door version of the Munich maker's 3 Series model isn't it? Used to be. Isn't now. Yes of course, the second generation 4 Series Coupe we look at here shares its technology and engines with the '3'. But visually and in character, it's these days differentiated from its more common showroom stablemate in a way that its predecessor never was. BMW says this MK2 4 Series Coupe handles quite differently from a '3' as well, even a sporty one. But as before, it sizes up to key segment arch-rivals from Audi and Mercedes, the A5 Coupe and the CLE Coupe. This 4 Series is additionally available in Convertible and four-door Gran Coupe forms. but it's the G22 Coupe version, first introduced in 2020 then updated in early 2024, that we look at here.

Driving Experience

There are no dynamic or engineering changes for this 'G22'-era model, but BMW has slimmed down the powerplant range considerably, discontinuing diesel power and dropping the previous mid-level 430i petrol variant. That leaves only two mainstream models; the base rear-driven 184hp 420i; and the six cylinder 374hp M440i, which only comes in xDrive 4WD form. That six cylinder engine also features in 530hp form in the flagship M4 Competition variant, also only offered in xDrive guise. As before, there are firm springs and anti-roll bars, plus this Coupe gets a double-jointed spring-strut front suspension and a 5-link rear axle. All the engines link up as standard with eight-speed Steptronic auto transmission, which incorporates Launch Control for Grand Prix-style getaways. As previously, the M440i gets a Sprint function that gives you a steering wheel paddle that when activated, gives you an extra burst of acceleration. Arguably, less is more here - it's the rear-driven 420i that gets closest to BMW's traditional mid-sized coupe driver's formula. Rivals have long tried to copy this variant's front engine, rear wheel drive BMW layout with its near perfect 50:50 weight distribution - but never quite managed to deliver a package with the same kind of involving finesse. Super-effective traction and stability systems keep those back wheels in check so that if you're not a driving enthusiast, it'll all feel quite normal. But if you are, then the feeling of being propelled up the road by the back wheels as you exit a bend rarely fails to offer up a great feeling of pleasure.

Design and Build

When this MK2 4 Series Coupe first arrived, we were all talking about its new upright grille; now BMW wants us to talk about the car's redesigned LED headlights, with their smarter illuminating signature. That controversial grille is now surrounded by matte chrome and there are restyled front and rear bumpers too. Customers can add in the 'laser' rear lighting units first seen on the rare M4 CSL, plus there are restyled 19-inch wheel designs. And the top M440i gets black exterior design elements and horizontal bars within the kidney grilles. The CLAR mixed steel-and-alloy platform that underpinned the previous version of this car is retained, but BMW has tried to reduce its weight through greater use of aluminium panels. Inside, the air vents have been redesigned, as has been the steering wheel, which is now flat-bottomed and has standard shift paddles for the auto gearbox. As before, the 'BMW Live Cockpit Professional' dash set-up is standard, offering a fully digital screen layout that gives you a high-resolution 12.3-inch instrument cluster behind the steering wheel and a 10.25-inch iDrive infotainment Central Control Display, which now runs the brand's latest OS 8.5 software system, which gives you more customisation options. There's also enhanced voice control for the climate functions. As before, this is billed as a 'proper four-seater', though adults wouldn't want to be in the rear for very long. Out back, there's a 440-litre boot, extendable via 40:20:40-split backrests.

Market and Model

Sporty 'M Sport' trim is standard and prices start from around £44,000 for the entry-level 420i Coupe. You'll need just under £61,000 if you want the M440i xDrive Coupe. And around £84,000 if you want the M4 Competition xDrive Coupe. Equipment levels have been subtly upgraded. Ambient lighting's now standard and upholstery comes in a new velour the brand calls 'M Performtex'. Optional is Sensatec perforated manmade leather - or real quilted Vernasca leather. Interior trim strips in Aluminium Rhombicle Anthracite are standard, whilst Fineline Light Brown open-pored and Grey Blue Ash open-pored fine-wood trim, and M interior trim carbon fibre are available as options. Customers can also now have the gear selector lever, iDrive Controller and Start/Stop button in a 'CraftedClarity cut-glass finish. A Personal eSIM comes as standard with the car, in addition to its built-in mobile SIM. This enables the vehicle to use the 5G mobile communications as standard. The Personal eSIM allows the customer to use the communications and connectivity functions covered by their mobile contract from their car with ease - even in situations where they don't have their smartphone with them. This also includes data streaming via the WiFi hotspot. Wheel sizes vary between 18 and 20-inches and among the options are an M Performance front ornamental grille and M Performance side sill attachments, both in carbon fibre. Interior equipment highlights include the M Performance seat back pans in Alcantara/carbon fibre, the M Performance interior trim strips in carbon fibre and the M Performance door sill trims, also in carbon fibre.

Cost of Ownership

As before, mild hybrid technology is included with both the mainstream engines. Fitting a 48V starter-generator and second battery greatly increases the scope for utilising Brake Energy Regeneration and the electrical power it produces. The recuperated energy collected by the 48V battery can be supplied to the 12V electrical system or used for generating additional drive power when fed back to the 48V starter-generator. When the car is accelerating, the generator is also able to offer the driver an electric boost effect that instantly makes an extra 11hp available. All of which should promise a very competitive set of efficiency stats. Let's see. The 420i is rated at between 48.7 and 53.3mpg on the combined cycle and 132-122g/km of CO2; for the six cylinder M440i xDrive, it's 39.8-41.5mpg and 163-155g/km. For the M4 Competition xDrive Coupe, it's 28.2mpg and 226g/km. Residual values? Well we expect the depreciation on this facelifted second generation 4 Series Coupe to be pretty similar to that of its direct predecessor, which would mean a very competitive retained worth of about 45% after three years and 60,000 miles. On to the warranty package. BMW's warranty only lasts for three years but it includes an Emergency breakdown service and at least it isn't mileage limited - unlike the comparable package you'd get as standard with a rival Audi. You can of course extent the warranty with either monthly or annual payments. There's a three year paintwork warranty and the usual 12 year anti-corrosion warranty.


So is this improved G22-era BMW 4 Series Coupe still the car in this class that does it all, the sector benchmark, the go-to choice in its segment? If you're the kind of driving enthusiast this model has traditionally appealed to, the answer's probably yes. Overall, there's a sustained level of excellence shot throughout this contender that Audi A5 and Mercedes CLE Coupe rivals still can't quite match. There's a levity about this 4 Series, a certain joy you get in driving it that the others can't quite emulate. Great then, that it does all the sensible stuff really well too. You get a spacious boot, comparatively decent rear legroom, very competitive day to day running costs and sensible residual values. Which all helps your conscience. Why? Because this is a car that, exactly because of those attributes, you can buy and use - and use hard - without that nagging sense of guilt that you may have over-indulged yourself.


This vehicle is fitted with a Particulate Filter. Vehicles with a Particulate Filter driven at low speeds in urban traffic can require periodic trips at higher speeds to clear out the filter.

* Depending on the age of the vehicle, MPG and CO2 may be quoted using either NEDC or WLTP testing standards.  Find out more

Figures are provided for comparison purposes. Fuel consumption under real world driving conditions and the CO2 produced will depend upon a number of factors, including any accessories fitted after registration, variations in driving styles, weather conditions and vehicle load.

Choose your finance

These are estimates and could change if you decide to apply for finance. Car finance explained.

Personal contract purchase (PCP)

This is an example, we’ll always discuss your options in detail before you choose.

47 monthly payments of£475.55
Total amount payable£38,701.85
Fixed interest rate5.1%
Representative APR9.9%
Cash price£29,898
Credit amount£29,649
Annual mileage8000
Contract mileage32,000
Excess mileage charge10.16p per mile
Completion fee£1
Optional final payment£16,102
Term (months)48

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Glasgow BMW

10 Mossland Drive, Hillington Park, Glasgow, G52 4FA

Phone Number

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  • BMW 4 SERIES - 420i M Sport 2dr Step Auto
  • ST71OPL
  • GBP
  • 29898
  • 7380 miles, Glasgow BMW