Fuel system, gasoline
Free remedy
Kia America, Inc. (Kia) is recalling certain 2021-2024 K5 vehicles. A damaged check valve can allow air to enter the fuel tank, causing it to expand and contact hot exhaust components, melting the tank.
Research · Large Cars
2024 Kia K5Recalls, problems, MPG & safety
NHTSA lists 2 safety recalls and 31 owner complaints for the 2024 Kia K5. Most complaints involve engine (9) and structure (7). The EPA rates it 27–31 mpg combined, and NHTSA gives it 5 stars overall.
Combined MPG
27–31mpg
EPA · 3 versions
NHTSA overall
5of 5 stars
NCAP crash tests
Safety recalls
2campaigns
Latest Nov 2025
Owner complaints
31
Top: engine
Fuel cost / yr
$2,050est.
EPA estimate, best version
Safety recalls
2 NHTSA campaigns · applies to some vehicles, check your VIN
Structure: roof and pillars
Free remedy
Kia America, Inc. (Kia) is recalling certain 2023-2025 K5 vehicles. The left and right rear window trim pieces may loosen and detach.
Data from NHTSA Recalls API · synced Oct 30, 2026 · All recall detailsNHTSA vehicle page
Owner complaints by component
31 complaints filed with NHTSA · Dec 2023 – Oct 2026
- Engine9
- Structure7
- Electrical system6
- Forward collision avoidance4
- Fuel/propulsion system3
- Power train3
- Vehicle speed control2
- Service brakes2
- Fuel system, gasoline2
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.
Data from NHTSA Complaints API · synced Oct 30, 2026 · Full problem breakdownNHTSA vehicle page
What owners report most
Verbatim excerpts from NHTSA complaints, by component
Engine
9 reports
“I bought this vehicle less than 60 days ago and there is transmission hesitation, hard engagement in lower gears, Rough jerking shifting along with acceleration lag. Erracric shifting and phantom braking. I have taken it into the dealership I bought it at at they are not seeing anything. It currently is at another Kia dealership for the past two days. This vehicle is going to cause an accident that puts my safety and others at risk. There is no warning lights that come on. I have done my research and there has been other complaints from other consumers having the same issues. I do have video of in town driving but have not been on the highway”
Structure
7 reports
“chrome pillars came off on highway. the recall was sent in mail but upon visitation to kia for a different recall, I mentioned pillars and they did not have part to repair and there was a wait for part on their end is what they said. car was literally built with many defects I don't know how it passed inspection.”
Electrical system
6 reports
“Beginning only about 6 months after I purchased the vehicle, the audio system intermittently screams at me, blasting at over 800 decibels road, engine noise and audio interference noises so that I cannot hear the radio, the telephone, turn it off or down, even when the audio infotainment system is not running. The only way to keep the vehicle from doing this when it occurs is to turn off the car. The noise is so loud that I cannot hear oncoming vehicles, including emergency vehicles, nor can I use the bluetooth phone system - if necessary I would have to break the state law about holding my phone to scream into it- even if someone could hear me on the other end. If I had the windows open, the audio system would break local noise ordinances. It is almost impossible to drive the vehicle when this occurs even though the dealership has said several times that I must bring it in when it is occuring; on one occasion to fulfill this requirement, I put in my earbuds and played music to drive to them for 1 hr to drown out the sound still surpassing my ability to safely focus on the road. Having documented PTSD, ADHD and anxiety disorder, having to drive the vehicle not…”
Data from NHTSA Complaints API (owner reports, unverified) · synced Oct 30, 2026
Engines, transmissions & drive
3 versions rated by the EPA
- EPA class
- Large Cars
- Engines
- 1.6L 4-cyl turbo · 2.5L 4-cyl turbo
- Transmissions
- Automatic (S8) · Automatic (AM-S8)
- Drive
- Front-Wheel Drive · All-Wheel Drive
- Fuel
- Regular Gasoline
Towing, payload and dimensions aren’t in the EPA or NHTSA data, so we don’t list them.
Data from EPA fueleconomy.gov · synced Oct 30, 2026EPA listing
EPA fuel economy by version
City / highway / combined, annual fuel cost and CO₂
EPA
| Version | City | Hwy | Comb. | Fuel / yr | CO₂ g/mi |
|---|---|---|---|---|---|
| K5 Auto (S8), 4 cyl, 1.6 L, Turbo · Front-Wheel Drive | 27 | 37 | 31 | $2,050 | 293 |
| K5 AWD Auto (S8), 4 cyl, 1.6 L, Turbo · All-Wheel Drive | 25 | 33 | 28 | $2,300 | 316 |
| K5 Auto (AM-S8), 4 cyl, 2.5 L, Turbo · Front-Wheel Drive | 24 | 32 | 27 | $2,400 | 332 |
- 31mpg comb.
- 28mpg comb.
- 27mpg comb.
Data from EPA fueleconomy.gov · synced Oct 30, 2026 · Fuel cost is EPA’s annual estimate (15,000 mi, 55% city)
NHTSA 5-Star Safety Ratings
2 tested variants
Overall rating
5/ 5
5 of 5Kia K5 4 DR AWD
- Frontal crash
- 4 of 5
- Side crash
- 5 of 5
- Side pole
- 5 of 5
- Rollover
- 4 of 5
- Rollover risk
- 10.7%
Overall
5 / 5
Kia K5 4 DR FWD
- Frontal crash
- 4 of 5
- Side crash
- 5 of 5
- Side pole
- 5 of 5
- Rollover
- 4 of 5
- Rollover risk
- 10.7%
Maintenance basics
General guidance, not the OEM schedule. Check your owner’s manual.
General guidance
| Item | Miles | Time | Note |
|---|---|---|---|
| Engine oil & filter | 5,000–10,000 mi | 6–12 months | Follow the oil-life monitor if fitted |
| Tire rotation | 5,000–7,500 mi | Every oil change | Check pressure monthly |
| Engine air filter | 15,000–30,000 mi | 1–2 years | Sooner in dusty areas |
| Cabin air filter | 15,000–25,000 mi | 1–2 years | |
| Brake fluid | — | 2–3 years | Absorbs moisture over time |
| Coolant | 60,000–100,000 mi | 5–10 years | Long-life coolants last longer |
| Spark plugs | 60,000–100,000 mi | — | Iridium/platinum plugs at the long end |
| 12V battery | — | 3–5 years | Heat shortens battery life |
- Engine oil & filter5,000–10,000 mi
6–12 months - Tire rotation5,000–7,500 mi
Every oil change - Engine air filter15,000–30,000 mi
1–2 years - Cabin air filter15,000–25,000 mi
1–2 years - Brake fluid—
2–3 years - Coolant60,000–100,000 mi
5–10 years - Spark plugs60,000–100,000 mi
— - 12V battery—
3–5 years
Typical intervals for modern cars. Severe service (towing, short trips, extreme heat or cold) shortens them.
2024 K5 questions
How many recalls does the 2024 Kia K5 have?
2 safety recalls as of Oct 30, 2026, according to NHTSA. Recall repairs are free at a dealer. Check your VIN to see whether your car is included and whether the repair was done.
What are the most common 2024 Kia K5 problems?
Owners filed 31 complaints with NHTSA. The most-cited components are engine (9), structure (7), electrical system (6). Complaints are unverified owner reports and aren't adjusted for how many cars were sold.
What MPG does the 2024 Kia K5 get?
The EPA rates the 2024 Kia K5 at 27–31 mpg combined, depending on engine and drivetrain (3 versions rated).
How safe is the 2024 Kia K5?
NHTSA's New Car Assessment Program gives the 2024 Kia K5 5 out of 5 stars overall.
Data from NHTSA & EPA · synced Oct 30, 2026