2025 Kia K5 Problems: 4 Known Issues
2025 model year · NHTSA recalls, manufacturer TSBs, and owner forum reports · Updated October 2026
According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2025 Kia K5 has 4 documented known issues. None of the listed issues is rated critical; this is not a complete reliability assessment. Across all issues with published estimates, repair costs range from $10 to $2,000. DIY maintenance guides at au7o.io.
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All 4 Known Issues
NHTSA Recalls8 recalls
EXTERIOR LIGHTING:LIGHTING CONTROL MODULE:SOFTWARE
Kia America, Inc. (Kia) is recalling certain 2025 K5 vehicles. A software error in the Power-net Domain Controller (PDC) may cause the parking lights to flicker. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) 108, "Lamps, Reflective Devices, and Associated Equipment."
STRUCTURE:BODY:ROOF AND PILLARS
Kia America, Inc. (Kia) is recalling certain 2023-2025 K5 vehicles. The left and right rear window trim pieces may loosen and detach.
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.
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.
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.
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Frequently Asked Questions
What are the most common Kia K5 problems?
According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2025 Kia K5 has 4 documented issues. The most frequently reported are: Theta II Engine Knock Sensor Issues and Knock-Related Concerns, ADAS Sensor Calibration Faults (Lane Keep, Forward Collision), Infotainment Screen Blackout and Random Reboots. None are rated critical, but regular maintenance is recommended.
Is the Kia K5 reliable?
The 2025 Kia K5 has 4 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. None of the matching records is rated critical; this is not a complete reliability assessment. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
How much does it cost to fix common Kia K5 problems?
Repair costs for known Kia K5 issues range from $0 to $2,000, depending on the specific problem and whether you choose DIY or professional repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
What is the 2021-2025 Kia K5 Theta II Engine Knock Sensor Issues and Knock-Related Concerns?
The 2.5L Theta II engine in certain K5 models has experienced knock sensor faults and engine knock concerns. The knock sensor may trigger false positives or fail to detect actual detonation, causing the ECU to either retard timing unnecessarily (reducing power) or fail to protect… Repairs typically run $0-$400. Severity: medium.
What is the 2021-2025 Kia K5 ADAS Sensor Calibration Faults (Lane Keep, Forward Collision)?
The Advanced Driver Assistance Systems on the K5 — including Lane Keep Assist, Forward Collision Avoidance, and Blind Spot Monitoring — intermittently throw calibration faults and disable themselves. The forward-facing camera behind the windshield and radar sensor in the front bu… Repairs typically run $0-$1,500. Severity: medium.
What is the 2021-2025 Kia K5 Infotainment Screen Blackout and Random Reboots?
The K5 infotainment system — both the 8-inch and 10.25-inch displays — experiences random screen blackouts, freezes, and spontaneous reboots. The screen may go completely black while driving, losing access to navigation, backup camera, and climate controls. Some owners report the… Repairs typically run $0-$2,000. Severity: medium.
What is the 2021-2025 Kia K5 Rear Trunk Latch Sticking and Failure to Open?
The electric trunk latch mechanism on the K5 is prone to sticking or failing to release, leaving the trunk locked. The issue is more common in cold weather when moisture gets into the latch mechanism and freezes. The trunk release button on the key fob, interior button, and exter… Repairs typically run $10-$400. Severity: low.
Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.