2025 Kia K4Fuel Economy & MPG Ratings
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Trim Comparison
| Trim | Engine | City | Hwy | Combined | Fuel Cost/yr |
|---|---|---|---|---|---|
| Automatic (AV-S1) | Regular | 30 | 40 | 34 | $2,000 |
| Automatic (AV-S1) | Regular | 29 | 39 | 33 | $2,050 |
| Automatic (S8) | Regular | 26 | 36 | 29 | $2,350 |
Based on gasoline at $3.67/gal, 15,000 miles/year
vs. average new vehicle
Environment
- CO₂ Tailpipe Emissions
- 264 g/mile
- Annual Petroleum Consumption
- 8.8 barrels
Specifications
- Engine
- 2L 4-cyl
- Transmission
- Automatic
- Drivetrain
- FWD
- Body Style
- Sedan
- GVWR
- Class 1 (≤6,000 lbs)
Source: EPA fuel economy data & NHTSA vPIC. Specifications reflect the most common trim configuration.
Engine & Efficiency Details
Source: EPA fueleconomy.gov
- Engine Size
- 2L, 4-cylinder
- Fuel Type
- Regular Gasoline
Annual Fuel Cost by State
Prices as of week ending May 18, 2026 · Source: EIA
| State | Gas Price | Annual Cost | vs. National Avg |
|---|---|---|---|
| National AvgEPA default | $4.490/gal | $1,981/yr | — |
| California | $5.957/gal | $2,628/yrHIGHEST | +$647 |
| Texas | $3.888/gal | $1,715/yrLOWEST | $-266 |
| Florida | $4.136/gal | $1,825/yr | $-156 |
| New York | $4.522/gal | $1,995/yr | +$14 |
| Ohio | $4.510/gal | $1,990/yr | +$9 |
| Washington | $5.591/gal | $2,467/yr | +$486 |
| Colorado | $4.618/gal | $2,037/yr | +$56 |
| Minnesota | $4.344/gal | $1,916/yr | $-65 |
| Massachusetts | $4.448/gal | $1,962/yr | $-19 |
Calculated at 15,000 miles/year (EPA standard assumption) using 34 MPG combined. Regular gasoline prices. Actual costs vary.
NHTSA Safety Ratings
Source: NHTSA (nhtsa.gov)Crash Test Scores
| Front Crash — Overall | |
| Front Crash — Driver Side | |
| Front Crash — Passenger Side | |
| Side Crash — Overall | |
| Side Crash — Driver Side | |
| Side Crash — Passenger Side | |
| Side Pole Crash | |
| Rollover | |
| Rollover Probability | 9.9% |
Safety Equipment
Recall History2
Source: NHTSAOwner-Reported Problems34 complaints
Source: NHTSANHTSA has received 34 owner complaints for the 2025 Kia K4. Top reported issues include advanced safety (adas), electrical system and power train. The data below is sourced from consumer complaints filed directly with NHTSA.
Problems by System / Component
2025 Kia K4 problems by category: Advanced Safety (ADAS): 12 complaints, Electrical System: 8 complaints, Power Train: 6 complaints, Air Bags: 5 complaints, Engine: 5 complaints, Steering: 4 complaints, Speed Control: 4 complaints, Fuel System: 2 complaints.
Sample Owner Complaints
Complaint data is sourced from the NHTSA Complaints Database. Reports are filed by vehicle owners and may not reflect confirmed defects. Last updated via NHTSA API.