46/100

2018Subcompact CarsPremium

2018 BMW 430i Convertible

EPA ID: 38600

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City MPG

Combined MPG

27MPG· Average

Highway MPG

Fuel Economy Overview

The 2018 BMW 430i Convertible achieves an EPA-estimated 27 MPG in combined city and highway driving, with 24 MPG in the city and 34 MPG on the highway. Powered by a 2L 4-cylinder turbocharged engine paired with a automatic (s8), this subcompact cars features Rear-Wheel Drive drive.

In terms of environmental impact, the 2018 430i Convertible produces approximately 324 grams of CO2 per mile. This figure is measured under standardized EPA test conditions and represents tailpipe emissions only. For context, the average new vehicle sold in the United States produces approximately 400 grams of CO2 per mile, meaning this 430i Convertible performs better than the national average in this regard.

The estimated annual fuel cost for this vehicle is $2,550, based on 15,000 miles of driving per year and current national average fuel prices. Compared to the average new vehicle, you would save $2,000 over a 5-year period. This calculation accounts for differences in fuel consumption efficiency and provides a practical measure of long-term ownership costs attributable to fuel economy.

Energy DNA

Vehicle ClassSubcompact Cars

Fuel TypePremium

Engine2L 4-cyl

AspirationTurbocharged

TransmissionAutomatic (S8)

Drive TypeRear-Wheel Drive

Green Scorecard

CO2 Emissions324 g/mi

Start-Stop SystemEquipped

GHG Score6/10

Smog RatingN/A

Est. Annual Cost$2,550

5-Year Cost DeltaSave $2,000

Personalized Commute CalculatorEPA defaults to 55% City / 45% Hwy

55% City45% Highway

Adjust the slider to match your daily driving habits. City driving involves stop-and-go traffic under 45mph, while highway driving represents sustained speeds over 55mph.

Your Real MPG

27.7

Impact vs EPA

$-46

/ year

💨

Aerodynamic Speed Penalty

EPA highway tests average roughly 48 mph. Driving at 75 mph increases aerodynamic drag exponentially. Expect your real-world highway fuel economy to drop by roughly 15-20% at interstate speeds.

5-Year Total Cost of Ownership

Estimated Monthly Cost

$612/mo

Includes estimated depreciation, fuel, insurance, and state fees over 5 years. Does not include loan interest.

Annual Mileage15,000 mi

Value Depreciation

Est. value lost over 60 months

$17,500

47.6%

Fuel & Electricity

Based on National Average rates ($3.50/gal)

$9,722

26.5%

Estimated Insurance

Based on vehicle class risk profile

$9,125

24.8%

State Registration Fees

Based on National Average DMV base rates

$400

1.1%

Total 5-Year Cost$36,747

Recall Intelligence

Campaign #17V507000·2017-10-13

critical

Component: SEAT BELTS:FRONT

BMW of North America, LLC (BMW) is recalling certain 2018 430i, 430i xDrive, 440i, 440i xDrive, and M4 convertible vehicles. The Emergency Locking Retractors (ELR) within the front seat belt assemblies may have been produced with incompatible vehicle-sensitive locking mechanism housings.

Consequence & Remedy

(Based on 200,000 miles driven)

64.8 metric tons CO₂

Equivalent To:

🌳 80 tree seedlings grown for 10 yrs

✈️ 5.4 cross-country flights/yr

Data Provenance

Data directly from the EPA National Vehicle and Fuel Emissions Laboratory. The combined rating is a weighted average (55% city, 45% highway). For official figures, visit fueleconomy.gov.