Owner-reported complaints naming the electrical system, filed with NHTSA
Data refreshed
Reports naming the electrical system — wiring, battery, charging, control modules, infotainment and electrical accessories. Every record below is an owner-reported complaint about the 2026 Kia Carnival submitted to NHTSA — not a confirmed defect, not a recall and not a manufacturer bulletin. 8 reports on file name it.
Complaints are reports submitted by owners and drivers to NHTSA. They are not verified and do not establish that a defect exists.
Shown in the owner’s own words, exactly as filed
Battery dies after car sitting for 1-3 days and requiring jumping to recharge. Parasitic tests have been inconclusive but issue remains. This is a safety issue where it’s unclear when the vehicle will start and be usable.
Child's arm was crushed in the sliding door when it failed to properly stop due to the sensor failing.
Battery shuts down overnight. To get the car to start you need to pop the hood the night before use a jump start and keep your manual key handy. All electronics shut down completely
I purchased a new 2026 Kia Carnival EX and noticed an unusually intense amount of heat coming from underneath the vehicle on the passenger side, particularly around the rear passenger door/second-row seating area. I first noticed the issue while the vehicle was parked and I was standing outside the open rear passenger door installing car seats and floor mats. The heat radiating from underneath the vehicle was intense enough that my feet and lower legs became extremely hot while standing next to the vehicle I also noticed that the seat/floor rails and other exposed metal components in and around the second-row passenger area became extremely hot to the touch. I could only keep my hand on some of these metal components briefly before the heat became too uncomfortable and I had to remove my hand. I am concerned about the safety of this condition because these hot surfaces are in an area routinely accessed by passengers, including children entering and exiting the second row. I am concerned about the potential for contact burns as well as whether the amount of heat being transferred into the floor, rails, and surrounding components could indicate an exhaust, emissions, heat-shielding, or other mechanical problem. The vehicle is available for inspection upon request. At this time, the exact component or system responsible for the excessive heat has not been identified. The issue has not yet been reproduced or confirmed by a Kia dealer or independent service center. I have contacted Kia service personnel regarding having the vehicle inspected. I was informed that if the vehicle is inspected and the dealership cannot reproduce or identify a problem, I may be responsible for an approximately $210 diagnostic charge. The vehicle has not yet been inspected by the manufacturer, police, insurance representatives, or another independent party regarding this issue. There were no warning lights or dashboard messages indicating a problem before or when I noticed the heat
Battery died at under 3,300 miles. After roadside came and jumped the batter, it died again after two days. Jumped again for the second time, when driving the car around it would randomly shut off even when the car is moving at higher speeds on freeway. The shut off would be for just one second and comes back on - everything starts resetting. And goes to user authoriztions notifications. Car shut off three times while driving around.
2026 Kia Carnival MPV Hybrid SX Prestige(Exterior: Astra Blue Interior: Tuscan Umber / Off-Black) purchased December 2025. Two separate safety-related defects have gone unresolved for 31+ cumulative days across two dealer repair visits. DEFECT 1 — INSTRUMENT CLUSTER: Instrument cluster screen goes blank while driving, eliminating speedometer, TPMS, and all warning indicators. First observed February 2026. Dealer visit February 13–17 (4 days): technician said could not replicate. Defect recurred. Kia has since issued a federal safety recall confirming this exact defect — citing FMVSS noncompliance and stating the blank screen increases crash risk due to a software error causing overheat protection mode. Vehicle was at dealer for an active safety recall defect that went undiagnosed during a repair visit. DEFECT 2 — SEAT MODULE: Second-row seat module failed. Vehicle returned to dealer March 5 (still there, 27+ days). Wiring harness replacement attempted approximately March 21 — failed, defect persisted. Kia Engineering formally escalated approximately March 24. Seat module ordered but not yet installed. No resolution or completion date provided. Vehicle has been out of service 31+ cumulative days. Safety recall defect went undetected during prior dealer repair visit. Both defects remain unresolved on a vehicle purchased just 97 days ago.
This new 2026 Vehicle faced multiple issues within a few weeks of purchase as stated below. 1. The instrument display panel or the main display screen of the car stopped working. The screen was completely blank and would not turn on. (confirmed and reproduced by Kia dealer, service order attached) 2. An electric short caused the radio to fail (confirmed and reproduced by Kia dealer, service order attached) 3. The car battery died, rendering the car completely unresponsive. The car had to be towed to the Kia Dealer. (confirmed and reproduced by Kia dealer, service order attached) All of the above 3 issues happened one after the other. The first issue essentially disabled safety features of the vehicle as the display panel that displays rear view camera, camera monitoring system (CMS), etc was not able to display any information. An eventual electric short and a dead battery rendered the vehicle inoperable. The official Kia dealer attempted to diagnose and repair the vehicle. The vehicle was at the dealer service for 15 days. The dealer initially suggested that a part needs to be replaced and is in backorder till May 2026. However subsequently the dealer then claimed that the vehicle is now operating normally and should be taken by the customer. No root cause of the electric short and battery and screen failure was disclosed. Also contrary to what is stated in the service order, the service manager at the dealer verbally suggested that they did not replace the malfunctioning component.
Vehicle parked for 48 hours (Sunday 23 Nov evening) under carport, no keys near it. When approached on 26 Nov 10am , it was found with dead battery. Nothing was on when it was parked.
Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers.
Data on this page last refreshed .