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BMW 4 Series
2021 · gas
6 measured figures
6 of the 9 figures this market publishes for a car like this one are measured for this car. This market publishes no overall score, so there is no share of a composite weight to measure confidence against; figures_measured says how many of this market's figures the row carries, and contributing_publishers says who measured them
Measured figures
Fuel economy29 mpg (US gallons)Measured by EPA · configuration: 430i Coupe
Tailpipe CO₂189 g/kmMeasured by EPA · CO₂ basis: tailpipe_rated · configuration: 430i Coupe · also 304 g/mile
HorsepowerFree with an accountMeasured for this car, with its publisher and basis
EPA test weightFree with an accountMeasured for this car, with its publisher and basis
WarrantyFree with an accountMeasured for this car, with its publisher and basis
Recall campaignsFree with an accountMeasured for this car, with its publisher and basis
4 more measured figures for this car — Horsepower, EPA test weight, Warranty, Recall campaigns — each with the publisher that measured it and the basis it is on. Free to read with an account.
Figures this car does not carry
Fuel economy (MPGe)Not published for this carFuel economy (MPGe) is published for electric and hydrogen cars, whose economy is published as MPGe: energy converted at 33.7 kWh per gallon, not fuel burned; this car is not one of them, so the figure is not the same quantity for it
Tailpipe CO₂ (charge-weighted)Not published for this carthis car's CO₂ is published as the tailpipe rating for the car driven as rated on the test cycle (189 g/km), not as a composite weighted across electric and fuel-burning miles, so it is not the quantity this list orders. It is published as Tailpipe CO₂
Engine horsepowerNot published for this carNot published for this car. The record's own reason is free to read with an account.
Kerb weightNot published for this carNot published for this car. The record's own reason is free to read with an account.
NHTSA overall ratingNot published for this carNot published for this car. The record's own reason is free to read with an account.
Complaints per 10,000 builtNot published for this carNot published for this car. The record's own reason is free to read with an account.
PriceNot published for this carNot published for this car. The record's own reason is free to read with an account.
5-Year Running Costs
| Fuel | $10,276 |
| Insurance | $10,540 (modelled) |
| Maintenance | $7,800 (class estimate) |
| Repairs | $8,000 (modelled) |
| Depreciation | not estimated — we hold no purchase price for this car, and it is not assumed. |
| Total | not estimated — a component above is unknown or modelled |
Running costs only — the purchase price is not included. The five-year running cost is an ESTIMATE, not a measurement of this car: only its fuel half is computed from the car's own measured consumption and a dated pump price (see fuel_price_source and fuel_price_as_of in the market's own figures); insurance, maintenance and repairs are class models. It orders no list and is not one of this market's published figures. Fuel is this car's own combined consumption over 13,800 miles a year at $4.319 a US gallon of petrol (U.S. Energy Information Administration, Gasoline and Diesel Fuel Update: U.S. regular gasoline retail price, all formulations, weekly, 2026-09-14). Insurance, maintenance and repairs are models, not figures for this car: insurance from its power, weight and crash rating, maintenance from its make's class, repairs from its complaint and recall counts. They are shown for scale and are not used to rank it. Confidence is low: several components are modelled from class averages.
Known Issues
ELECTRICAL SYSTEM
6 complaint(s)
The contact owns a 2021 BMW 430I Convertible. The contact stated while driving 40 MPH, the electrical system suddenly failed, and all the instrument panel lights turned black. There were no warning li…
ENGINE
4 complaint(s) · 1 reports a crash, fire, injury or death
The car basically blew up on the highway at rush hour. BMW knows of this issue with this model and has some of their other models under a recall for this very thing. I have a service action from BMW…
SEAT BELTS
4 complaint(s)
The seat belt retractor keeps breaking, dealer fixed it once, broke after two days, dealer did not want to fix again, arguing for over a year, finally they fixed it supposedly, it broke again in less…
UNKNOWN OR OTHER
2 complaint(s)
Brought a New 2021BMW M440 only 5 months ago, garage kept, has less than 4,000 miles. I woke up with a 10” crack across windshield @ 6:30 am on 9/28/2021with popping sounds. Windshield was shown on ca…
FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL
1 complaint(s)
POWER TRAIN:DRIVELINE:DIFFERENTIAL UNIT
1 complaint(s)
The contact owns a 2021 BMW 430I. The contact stated while stopped at a traffic light, the light turned green; however, when the accelerator pedal was depressed, the vehicle failed to respond as inten…
SERVICE BRAKES
1 complaint(s) · 1 reports a crash, fire, injury or death
Vehicle brakes malfunctioned.
TIRES:SIDEWALL
1 complaint(s)
Pirelli Cinturato 7 all season 225/40R19 I found front and rear bump side wall tires and miles driven 5300 miles. I’m very concern about this issues
Data sources
- EPA — fuel economy and CO₂ label figures
- NHTSA — crash-test ratings, recalls and owner complaints
- New York State DMV — New York registrations, the cross-check on that denominator
- carstandings.com — basic-warranty terms, from this site's reviewed table
- EPA — horsepower and EPA test weight, from the Test Car List