When two vehicles share a platform, they share more than a chassis and a charging port. They share suppliers, software, sub-assemblies — and, when something goes wrong, they share liability. The clearest live example in the electric-vehicle market is the Hyundai-Kia E-GMP platform, and the cleanest way to see the shared exposure is to lay the Kia EV6's NHTSA complaint file next to the Hyundai Ioniq 5's. They are, in their essential shape, the same file.
NHTSA's complaintsByVehicle endpoint returns 68 consumer complaints against the 2024 Kia EV6. Of those, 49 cite the electrical system — about 72 percent, almost the identical proportion seen in the Ioniq 5 data. The supporting clusters are the same too: power train (16 reports) and fuel/propulsion system (14), both of which co-occur with the central electrical failure. The component at the center is the same one named in the Hyundai file: the Integrated Charging Control Unit (ICCU), the E-GMP module that charges the 12-volt battery and manages the high-voltage charging path. When it fails, the vehicle loses drive power.
The same failure, in the owners' own words
The EV6 complaint summaries read like they were written by the same hand as the Ioniq 5's, because the underlying part is identical. In a report filed December 23, 2025, an EV6 owner wrote: "Kia has a known ICCU issue with several of their electric vehicles. Mine went out yesterday creating an extremely dangerous situation on the road. After it blew, I lost the ability to accelerate or steer." A December 14, 2025 complaint is terser and just as recognizable: "ICCU failed. Heard a popping sound from rear of passenger compartment, dash errors lit up, car went to limp mode." The loud pop, the dashboard cascade, the limp-mode collapse — it is the Ioniq 5 fingerprint, on a Kia badge. A November 28, 2024 report adds a charging-side variant of the same fault: "Despite showing 40 miles of range remaining, the battery suddenly dropped to 5 miles before the car became completely unresponsive and failed to charge." The throughline is that the ICCU sits at the junction of charging and propulsion, so its failure can present as a charging fault, a power loss, or both at once — which is exactly why the complaint clusters for electrical, powertrain, and propulsion overlap so heavily in the file.
As with the Hyundai, a 12-volt-battery subplot runs alongside the ICCU reports. One EV6 owner described having "to have my rental car jumped 3 times," with "battery discharge" warnings appearing "almost daily." Another reported the 12-volt battery dying "without warning" — once in a driveway at 93 percent state of charge, once at a workplace charging station — each time requiring a jump and a multi-day dealership stay. The convergence of symptoms across two nameplates is exactly what shared-supplier risk looks like when it reaches consumers.
Recalls filed in lockstep
The recall record confirms that this is one defect managed across two brands. Kia's first ICCU action, campaign 24V200000, was filed March 14, 2024 — one day before Hyundai's parallel 24V204000. Its language is functionally identical: "The Integrated Charging Control Unit (ICCU) may become damaged and stop charging the 12-Volt battery, which can result in a loss of drive power," with the same consequence, "A loss of drive power increases the risk of a crash." The remedy mirrors Hyundai's as well: "Dealers will inspect and replace the ICCU and its fuse, as necessary," plus an ICCU software update.
Then came the second round. Kia filed campaign 24V867000 on November 18, 2024 — the very same day Hyundai filed its superseding 24V868000. The synchronization is not a coincidence; it is the signature of a shared-platform corrective action being executed across two divisions of the same parent group. For an analyst tracking warranty and recall exposure, this is the important structural fact: a single defective sub-assembly from a shared supplier generated near-simultaneous, near-identical recall campaigns across Hyundai and Kia, multiplying the affected-vehicle population and the remediation cost across the group's entire E-GMP fleet — Ioniq 5, Ioniq 6, EV6, and the Genesis Electrified models.
Why platform economics cut both ways
Shared platforms are one of the most powerful cost levers in the auto industry. Spreading the development cost of an electric architecture across multiple brands and models is how Hyundai Motor Group brought competitive EVs to market quickly and at scale. But the same engineering decision that lowers per-unit development cost also concentrates risk: a defect in a shared component is, by definition, a defect in every model that uses it. The ICCU episode is a textbook demonstration. The part that made the E-GMP platform efficient to build is the part that made its recall expensive to fix — across not one model, but the whole family.
For EV6 owners, the practical guidance is the same as for Ioniq 5 owners, and the cross-brand pattern makes it more urgent, not less. First, a vehicle repaired only under the earlier 24V200000 software remedy should be checked against the superseding 24V867000 campaign, which may call for physical ICCU and fuse replacement. Second, the failure is a sudden loss of drive power, not a slow degradation — the December 2025 report of losing "the ability to accelerate or steer" after the unit "blew" is the worst-case scenario the recall exists to prevent. Third, repeated 12-volt battery deaths should be documented and reported, because the aggregate complaint signal across both brands is what sustains regulatory attention on the shared defect.
The takeaway for the market is broader than any one campaign. As more automakers consolidate onto a handful of dedicated EV platforms, the ICCU saga is a preview of how defects will propagate: not model by model, but platform by platform. The 68-complaint EV6 file and the 211-complaint Ioniq 5 file are not two separate stories. They are one component's story, told twice.