MPGTerminal
42/100
2004Midsize CarsRegular

2004 Hyundai Sonata

EPA ID: 19753
20
City MPG
23
Combined MPG
23MPG· Average
28
Highway MPG

Fuel Economy Overview

The 2004 Hyundai Sonata achieves an EPA-estimated 23 MPG in combined city and highway driving, with 20 MPG in the city and 28 MPG on the highway. Powered by a 2.4L 4-cylinder engine paired with a manual 5-spd, this midsize cars features Front-Wheel Drive drive.

In terms of environmental impact, the 2004 Sonata produces approximately 386 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 Sonata performs better than the national average in this regard.

The estimated annual fuel cost for this vehicle is $2,600, based on 15,000 miles of driving per year and current national average fuel prices. Compared to the average new vehicle, you would save $2,250 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 ClassMidsize Cars
Fuel TypeRegular
Engine2.4L 4-cyl
AspirationNaturally Aspirated
TransmissionManual 5-spd
Drive TypeFront-Wheel Drive

Green Scorecard

CO2 Emissions386 g/mi
Start-Stop SystemNot Equipped
GHG Score-1/10
Smog RatingN/A
Est. Annual Cost$2,600
5-Year Cost DeltaSave $2,250

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
23.0
Impact vs EPA
+$5
/ 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
$607/mo
Includes estimated depreciation, fuel, insurance, and state fees over 5 years. Does not include loan interest.
15,000 mi
Value Depreciation
Est. value lost over 60 months
$16,000
43.9%
Fuel & Electricity
Based on National Average rates ($3.50/gal)
$11,413
31.3%
Estimated Insurance
Based on vehicle class risk profile
$8,600
23.6%
State Registration Fees
Based on National Average DMV base rates
$400
1.1%
Total 5-Year Cost$36,413

Recall Intelligence

Campaign #09V124000·2009-07-17
critical
Component: SUSPENSION

HYUNDAI IS RECALLING 188,282 MY 2001-2004 SONATA AND MY 2001-2004 XG300 AND XG350 VEHICLES ORIGINALLY SOLD IN OR CURRENTLY REGISTERED IN THE STATES OF CONNECTICUT, DELAWARE, ILLINOIS, INDIANA, IOWA, MAINE, MARYLAND, MASSACHUSETTS, MICHIGAN, MINNESOTA, MISSOURI, NEW HAMPSHIRE, NEW JERSEY, NEW YORK, OHIO, PENNSYLVANIA, RHODE ISLAND, VERMONT, WEST VIRGINIA, WISCONSIN, AND THE DISTRICT OF COLUMBIA. ROAD SALT APPLIED IN THESE JURISDICTIONS DURING THE WINTER MONTHS MAY RESULT IN PROGRESSIVE, INTERNAL CORROSION OF THE FRONT SUB-FRAME ON THE VEHICLES, AND MAY RESULT IN THINNING OR PERFORATION OF THE SUB-FRAME STEEL. THE CORROSION IS FREQUENTLY VISIBLE AND OFTEN DISCOVERED DURING INSPECTION OR ROUTINE MAINTENANCE, AND OWNERS MAY ALSO HEAR NOISES OR NOTICE TIRE MISALIGNMENT AND STEERING PULL. IF THESE SIGNALS ARE UNDETECTED OR UNHEEDED, THE CORROSION MAY PROGRESS AND THE FORWARD MOUNTING OF THE LOWER CONTROL ARM MAY DETACH FROM THE SUB-FRAME.

Consequence & Remedy

Consequence: IF THAT HAPPENS, THE VEHICLE MAY LOSE DRIVE POWER TO THE WHEELS, AND THE FRONT WHEEL MAY MAKE CONTACT WITH THE FENDER OR WHEEL WELL, THEREBY INCREASING THE RISK OF A CRASH.

Remedy: DEALERS WILL MEASURE THE THICKNESS OF THE FRONT SUB-FRAME AND INSPECT THE FRONT SUB-FRAME FOR CORROSION DAMAGE AND, IF NECESSARY, THE FRONT SUB-FRAME WILL BE REPLACED WITH A NEW SUB-FRAME THAT INCORPORATES ADDITIONAL HOLES IN THE UPPER AND LOWER PANELS. IF THE FRONT SUB-FRAME DOES NOT REQUIRE REPLACEMENT, THE DEALER WILL ADD DRAINAGE HOLES TO THE SUB-FRAME AND WILL TREAT THE SUB-FRAME WITH RUST-PROOFING MATERIAL TO STOP THE CORROSION PROCESS. THIS PROCEDURE WILL BE PERFORMED FREE OF CHARGE. THE RECALL IS EXPECTED TO BEGIN DURING APRIL 2009. OWNERS MAY CONTACT THE HYUNDAI CUSTOMER ASSISTANCE CENTER AT 1-800-633-5151.

Loading live complaint data...

Looking for comprehensive historical data?

NHTSA FARS (Fatal Crash History) and broader generational safety trends are aggregated at the model level rather than by specific engine configurations. View the complete historical data profile for all Hyundai Sonata configurations.

View Model History

Similar 2004 Midsize Cars Alternatives

2004 Chevrolet Malibu

3.5L 6-cyl Front-Wheel Drive

23MPG
City: 20Hwy: 29$2,600/yr

2004 Kia Optima

2.4L 4-cyl Front-Wheel Drive

23MPG
City: 20Hwy: 27$2,600/yr

2004 Mitsubishi Galant

2.4L 4-cyl Front-Wheel Drive

23MPG
City: 20Hwy: 27$2,600/yr

2004 Nissan Altima

2.5L 4-cyl Front-Wheel Drive

23MPG
City: 20Hwy: 27$2,600/yr

2004 Nissan Altima

2.5L 4-cyl Front-Wheel Drive

23MPG
City: 20Hwy: 28$2,600/yr

2004 Volkswagen Passat

1.8L 4-cyl Front-Wheel Drive

23MPG
City: 19Hwy: 28$3,000/yr

Fuel Cost Analysis

Annual Fuel Cost$2,600
vs. Avg Vehicle (5 yrs)Save $2,250

Based on 15,000 miles/year and current fuel prices.

Efficiency Breakdown

City20 MPG
Highway28 MPG
Combined23 MPG

Estimated Lifetime Carbon Footprint

(Based on 200,000 miles driven)

77.3 metric tons CO₂
Equivalent To:
🌳 96 tree seedlings grown for 10 yrs
✈️ 6.4 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.