This page covers 2 recalls, 16 owner complaints and EPA fuel economy for the 2026 Hyundai Ioniq 9.
88–92 MPGe combined
Standard Sport Utility Vehicle 2WD
Fuel economy data from fueleconomy.gov (EPA / U.S. Dept. of Energy). Annual cost based on 15,000 mi/yr at 55% city driving and current fuel prices. MPG is U.S. gallons; L/100km converted. Ranges reflect the 2 tested variants for this model year.
Electrical system complaints dominate what owners of the 2026 Ioniq 9 report, with several describing the same progression: a warning light appears during normal driving, vehicle performance drops noticeably, and the car eventually loses all power and becomes immobile. Multiple owners point to failure of the ICCU (integrated charging control unit) as the diagnosed cause, and at least one dealer confirmed having seen the issue before. The pattern typically unfolds quickly, leaving drivers pulling to the shoulder before the vehicle stops moving entirely. Seat complaints and vehicle speed control issues each account for a small number of reports, including one owner who describes the automatic emergency braking system failing to detect a hazard and not activating. The ICCU-related power loss is the clearest recurring theme, with owners describing a consistent sequence of fault alert, gradual performance degradation, and complete loss of drive power.
16
Total Complaints
2
With Injuries
By System
The 2026 Hyundai IONIQ 9 has two recalls of equal seriousness: a high-voltage battery that can short-circuit and catch fire, and rear suspension fasteners that can loosen and fall off, causing loss of vehicle control.
The battery issue stems from a loose internal connection that creates a short circuit and raises the risk of fire. The suspension concern involves fasteners that can work free from the rear suspension entirely, leaving the driver unable to steer or control the vehicle predictably.
At a glance
What can fail
The bolts and fasteners holding the rear suspension together may loosen and come off, potentially causing loss of control of the vehicle.
What the fix does
Dealers will inspect the rear suspension fasteners, replace them if needed, and realign the rear of the vehicle at no cost.
Summarized — see the official notice for exact wording, dates, and contacts.
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Complaints are owner-reported and reflect individual experiences, not confirmed defects. They are distinct from recalls. Data sourced from the national vehicle safety complaint database. See trending complaints →
At a glance
What can fail
The high voltage battery system's bus bar connection may be insufficiently tightened, potentially causing an electrical short circuit.
What the fix does
Dealers will inspect and tighten the bus bar bolts, and replace the battery system if needed, at no cost.
Summarized — see the official notice for exact wording, dates, and contacts.
