Showing the 2025 K4 LX. We haven't verified this trim's engine; the numbers below cover every version of this model year. Every version
Owner complaints, recalls, fuel economy and safety ratings from public NHTSA and EPA data, updated Oct 17, 2026.
Fuel economy
29–34 mpgcombined; city 26–30, highway 36–40; every version of this model year
Five years of fuel
$9,550–$11,200U.S. average; Ohio $8,540–$10,010 at local prices; every version of this model year; fuel only, not other costs of owning it; 15,000 miles a year, at EIA fuel prices for the week of Oct 12, 2026
NHTSA's VIN data lists these trims for the 2025 K4. A trim's engine and numbers are shown as its own only where EPA names versions after the trim and no other version could be it; "seen with" means a source shows that engine on the trim, not that it was the only one. Recalls and complaints cover the whole model year: whether a recall applies to a car depends on its VIN, on NHTSA's recall lookup.
Owners have filed 47 complaints with NHTSA about the 2025 K4. These are unverified owner reports, counted by the part of the car they name; one complaint can name several parts. Counts aren't adjusted for how many were sold, so they don't show how reliable a car is.
Complaints by part of the car
Part
Complaints
Crashes
Fires
Injuries
Electrical system
14
1
0
1
Unknown or other
12
0
0
0
Power train
8
0
0
0
Air bags
7
4
0
4
Engine
7
0
0
0
Forward collision avoidance
7
4
0
3
Lane departure
7
3
0
4
Steering
5
2
0
2
Vehicle speed control
4
0
0
0
Back over prevention
3
2
0
0
Fuel/propulsion system
3
1
0
0
Engine and engine cooling
2
0
0
0
6 more parts
Service brakes
2
0
0
0
Wheels
2
0
0
1
Seats
1
0
0
0
Structure
1
0
0
0
Suspension
1
0
0
1
Tires
1
0
0
0
Complaints by model year
Newer years have had less time to collect complaints, and counts aren't adjusted for sales, so a shorter bar doesn't mean a more reliable year.
NHTSA lists 2 recall campaigns for the 2025 K4 over its history. Campaigns are matched by model and year, so each one may apply to a given car, and its repair may already be done: check a VIN on NHTSA's recall lookup for the open recalls on that exact car.
Kia America, Inc. (Kia) is recalling certain 2025 Kia K4, 2025-2026 Sorento, Sorento Hybrid, Sorento Plug-In Hybrid Electric (PHEV), 2026 Sportage, Sportage Hybrid, Sportage PHEV, K5, EV9, Carnival, and Carnival Hybrid vehicles. Due to a software error, the instrument panel display may fail. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) numbers 101, "Controls and Displays" and 138, "Tire Pressure Monitoring System."
Risk: An instrument panel display that fails to show critical safety information, such as the speedometer, tire pressure, or warning lights, increases the risk of a crash.
Remedy: The instrument panel display software will be updated over-the-air (OTA) or by a dealer, free of charge. Owner notification letters are expected to be mailed March 26, 2026. Owners may contact Kia Customer Service at 1-800-333-4542. Kia's number for this recall is SC361. Vehicle Identification Numbers (VINs) involved in this recall will become searchable on NHTSA.gov on February 9, 2026.
Kia America, Inc. (Kia) is recalling certain 2025 K4 and Sorento vehicles. The connecting rod bolts in the engine may have been improperly tightened, which can cause a loss of drive power.
Risk: A loss of drive power increases the risk of a crash.
Remedy: Dealers will replace the sub engine assembly, free of charge. Owner notification letters are expected to be mailed September 12, 2025. Owners may contact Kia customer service at 800-333-4542. Kia's number for this recall is SC349.
Carmakers sent NHTSA 19 service bulletins and notices that cover the 2025 K4, the latest on Jul 22, 2026. They tell dealers how to fix known issues.
The parts they mention most: electrical system (13), engine (2), visibility/wiper (2), back over prevention (1), exterior lighting (1).
NHTSA hasn't opened a defect investigation that covers this model year.
Maintenance
Oil
The owner's manual gives the oil and how often to change it. We show oil facts only once we've checked them against the manual, and we haven't yet for the 2025 K4.
EPA class: midsize cars. EPA greenhouse gas score: 6–7 out of 10. Each version EPA tested:
Swipe the table sideways for more columns.
Version
Engine
Transmission
Fuel
City / hwy / comb
K4 Front-Wheel Drive
2.0 L, 4 cyl
Automatic (AV-S1)
Regular Gasoline
30 / 40 / 34
K4 Front-Wheel Drive
2.0 L, 4 cyl
Automatic (AV-S1)
Regular Gasoline
29 / 39 / 33
K4 Front-Wheel Drive
1.6 L, 4 cyl, turbo
Automatic (S8)
Regular Gasoline
26 / 36 / 29
Sources and dates
U.S. EPA fuel economy data, file of Sep 29, 2026
NHTSA owner complaints, file of Oct 17, 2026
NHTSA recalls, file of Oct 17, 2026
NHTSA manufacturer communications, file of Oct 17, 2026
NHTSA defect investigations, file of Oct 17, 2026
NHTSA 5-Star Safety Ratings, file of Aug 7, 2026
U.S. Energy Information Administration, file of Oct 12, 2026
Fuel cost: EPA mpg with fuel prices for the week of Oct 12, 2026 and electricity prices for Jul 2026. Source: U.S. Energy Information Administration (Oct 2026). Complaints are unverified reports owners filed with NHTSA. About the data