Most common 2023 Kia K5 problems
Share of the 110 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
Kia K5 complaints by model year
Best K5 years: 2024. Years to avoid: 2025, 2023. Compare all years →
2023 Kia K5 recalls (4)
Fuel system, gasoline
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.
Remedy: Dealers will replace the check valve. The fuel tank will be inspected for damage and replaced as necessary. All repairs will be performed free of charge. Owner notification letters were mailed January 16, 2026.
Structure › Exterior trim
Kia America, Inc. (Kia) is recalling certain 2023-2025 K5 vehicles. The left and right rear window trim pieces may loosen and detach.
Remedy: Dealers will inspect and replace the C-pillar trim assemblies, as necessary, free of charge. Owner notification letters were mailed November 19, 2025. Owners may contact Kia customer service at 800-333-4542.
Air bags › Side/window › Curtain
Kia America, Inc. (Kia) is recalling certain 2021-2023 K5 vehicles. The side curtain air bags may have been installed incorrectly, causing them not to deploy properly in the event of a crash.
Remedy: Dealers will inspect and reinstall the side curtain air bags, as necessary, free of charge. Owner notification letters were mailed April 7, 2023. Owners may contact Kia customer service at 1-800-333-4542.
Power train › Automatic transmission
Kia Motors, Inc. (Kia) is recalling certain 2021-2022 Sorento and 2021-2023 K5 vehicles. The vehicle's "fail-safe" limited-mobility drive mode may be impaired, when prompted by a transmission oil pump malfunction, which can result in a complete loss of drive power.
Remedy: Dealers will inspect and replace the transmission, as necessary. Dealers will also update the transmission control unit software. All repairs will be performed free of charge.
NHTSA defect investigations
Federal safety investigators have looked into a possible defect involving the 2023 Kia K5:
Loss of Motive Power
The National Highway Traffic Safety Administration (NHTSA) received a letter dated July 13, 2022, petitioning the Agency to initiate a safety defect investigation into loss of motive power allegations attributed to oil drain pan assembly failures on certain Hyundai Motor America, Inc. and Kia America, Inc. vehicles spanning Model Years (MY) 2005-2021.
What 2023 Kia K5 owners say
Fuel & propulsion system all 55 →
The contact owns a 2023 Kia K5. The contact stated that while driving at various speeds, the check engine warning light intermittently flashed on the instrument panel. The contact used a code reader to diagnose the failure and received a code for a defective valve with an excessive amount of air. The contact then stated that while driving 80 MPH, there were three loud booming sounds coming from the rear end of the vehicle. The contact inspected the vehicle but found no external damage; however, the vehicle was hesitating while depressing the accelerator pedal. The contact then received a call from the dealer and was informed that the VIN was included in NHTSA Campaign Number: 25V794000 (Fuel System, Gasoline). The contact was instructed to bring the vehicle to the dealer for immediate service. …
The contact owns a 2023 Kia K5. The contact stated that while driving at various speeds, there was an abnormal sound coming from the vehicle, the fuel level was lowering, and a fuel odor was entering the cabin of the vehicle. No warning light was illuminated. Upon further inspection, the contact became aware that fuel was leaking from the vehicle onto the ground. The contact received notification of NHTSA Campaign Number: 25V794000 (Fuel System, Gasoline); however, the part to do the recall repair was not yet available. Two local dealers were contacted: Boniface Hiers Kia (3890 W New Haven Ave, Melbourne, FL 32904). The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the failure. The failure mileage was approximately 45,000.
Body & structure
The contact owns a 2023 Kia K5. The contact stated that the front splash guard had detached from the vehicle following a night of driving in the rain. The contact stated that the failure had occurred without impact. Upon inspection, the dealer informed the contact that the repair would not be covered under warranty and provided an estimate for the repair. The vehicle was not repaired. The manufacturer was notified of the failure, and the contact was provided with a case number. The failure mileage was 54,269.
The contact owns a 2023 Kia K5. The contact stated that the rear passenger's side chrome trim extending to the trunk had separated from the vehicle. The contact related the failure to TSB Number: SA552. The contact was concerned that the failure could cause a road safety hazard. The dealer and the manufacturer were not notified of the failure. The vehicle was not diagnosed or repaired. The failure mileage was approximately 13,500.
Engine & cooling
The contact owns a 2023 Kia K5. The contact stated while making a turn from a complete stop, the check engine warning light and several other unknown warning lights illuminated. The message "A possible condition with your engine control system has been detected" was displayed on the infotainment screen display. The accelerator pedal was depressed, but the vehicle failed to respond as needed. The contact was able to drive back to her nearby residence at a significantly slow speed. The vehicle was towed to the dealer, where the failure could not be replicated. The contact stated that the vehicle operated as needed; however, the failure recurred while making a left turn in a parking lot. The vehicle was towed to the dealer, where it was diagnosed that the throttle body had failed and needed to be replaced. The vehicle was repaired; however, the failure persisted. …
The contact owns a 2023 Kia K5. The contact stated that upon purchasing the vehicle new and driving off the dealer lot, the message "Radar Sensor Blocked" was displayed. The dealer was informed but no assistance was provided. The vehicle was driven to the residence. The contact stated that another message indicating that a sensor was blocked was displayed, and the check engine warning light was illuminated. The vehicle was taken to the dealer, where it was diagnosed and determined that the engine had imploded. The vehicle was not repaired. The manufacturer was notified of the failure and a case was filed. The manufacturer offered buyback assistance; however, the dealer had not returned the owner's or the manufacturer's calls. The failure mileage was approximately 74.
2023 Kia K5 engines & fuel economy
| Engine | Transmission | Drive | MPG city / hwy / combined |
|---|---|---|---|
| 1.6L 4-cyl turbo | 8-speed automatic | FWD | 27 / 37 / 31 |
| 1.6L 4-cyl turbo | 8-speed automatic | AWD | 25 / 33 / 28 |
| 2.5L 4-cyl turbo | 8-speed dual-clutch | FWD | 24 / 32 / 27 |
EPA ratings. Class: Large car.
Frequently asked questions
Is the 2023 Kia K5 a good car?
Based on 110 owner complaints filed with NHTSA, the 2023 K5 rates use caution: 1.5× as many complaints as a typical year of the K5 at the same age. It is one of the K5 years we suggest avoiding. Complaint counts don't account for sales volume or individual maintenance, so have any used car inspected before buying.
What is the most common problem with the 2023 Kia K5?
The fuel & propulsion system — 55 complaints, 50% of all complaints for this model year. Next are the body & structure (14) and engine & cooling (13).
How many recalls does the 2023 Kia K5 have?
There are 4 recalls for the 2023 Kia K5, the most recent from November 17, 2025 (fuel system, gasoline). Recall repairs are free at any authorized dealer — check whether yours has been done with the VIN recall check.
What are the best and worst years of the Kia K5?
The best years by complaints, compared at the same age, are 2024. Years to avoid or approach with caution: 2025 and 2023. See the full Kia K5 years comparison.
At what mileage do 2023 Kia K5 problems happen?
The median mileage reported in complaints is about 40,000 miles; 64% of problems with a recorded mileage started before 50,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.