NHTSA lists 3 safety recalls and 39 owner complaints for the 2026 Hyundai Ioniq 9. Most complaints involve electrical system (20) and fuel/propulsion system (10). The EPA rates it 85–92 mpg combined, and NHTSA gives it 5 stars overall.
Hyundai Motor America (Hyundai) is recalling certain 2026 Ioniq 9 vehicles equipped with a Limited, Calligraphy, or Calligraphy Design trim package. The second-row power seats may fail to detect a person. As a result, the seats may continue to move after contacting a person during powered seat functions, such as automatic power fold-and-stow.
Hyundai Motor America (Hyundai) is recalling certain 2025 Ioniq 5 and 2026 Ioniq 9 vehicles. The fasteners for the rear suspension may loosen and detach, which can result in a loss of vehicle control.
Hyundai Motor America (Hyundai) is recalling certain 2025-2026 IONIQ 5 and 2026 IONIQ 9 vehicles. The high voltage battery system may contain an improperly tightened bus bar, which can cause a short-circuit.
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.
Complaints for each Ioniq 9 model year we’ve synced.
Only one model year synced so far.
“Driving on a public road with a 50 phone speed limit, I received an error message on my dash stating electrical failure, and then the car shut down and began to coast, I had use all my strength to turn the car towards the curb and coasted to a stop. I received an error message from multiple components and then the dash went blank.”
“I am reporting serious repeated safety failures with my 2026 Hyundai IONIQ 9 involving unintended emergency braking and sudden loss of propulsion. While traveling approximately 70–75 mph northbound on I-15, the vehicle suddenly displayed an emergency braking warning and aggressively slowed despite no apparent obstacle or traffic condition requiring emergency braking. Before I could regain control, the vehicle came to a complete stop in active freeway traffic with vehicles around and behind me, creating an extreme risk of a high-speed rear-end collision. Something similar has happened on two other occasions. On a separate occasion while traveling on I-40, the vehicle again unexpectedly initiated emergency braking. I was able to disengage adaptive cruise control and regain control before the vehicle came to a complete stop. The vehicle has also experienced two separate loss-of-propulsion incidents. During one, the vehicle suddenly limited its maximum speed to approximately 22 mph and would not accelerate normally for approximately four miles before returning to normal operation without explanation. During another incident, the vehicle suddenly would not exceed…”
“My 2026 Hyundai Ioniq 9 (Performance Calligraphy AWD), leased new in late April 2026 from Team Hyundai of Bend, OR, suffered an Integrated Charging Control Unit (ICCU) failure at approximately 1500 miles in late June 2026, roughly two months into ownership. The failure progressed over several days. First, at a ChargePoint Level 2 (AC) station, the vehicle repeatedly displayed "charging started" every few minutes in a continuous start/stop/retry loop. Within days, AC charging failed completely: the vehicle reported "charging unsuccessful" on two separate EVSEs (a hardwired Level 2 charger and the Hyundai portable charger) across two different circuits. DC fast charging still worked. No other dashboard warnings were displayed. The dealer diagnosed a failed ICCU and replaced the unit. The vehicle was out of service for approximately 2 days thanks to the dealership's great service team. Luckily we were not out on a road trip which we have planned in the next 2 weeks which would have left us stranded with a newborn. This is a documented, ongoing safety defect across Hyundai, Kia, and Genesis E-GMP vehicles. ICCU failure can cause the 12-volt battery to stop…”
Towing, payload and dimensions aren’t in the EPA or NHTSA data, so we don’t list them.
| Version | City | Hwy | Comb. | Fuel / yr | CO₂ g/mi |
|---|---|---|---|---|---|
| Ioniq 9 RWD Auto (A1) · Rear-Wheel Drive | 103 | 81 | 92 | $850 | — |
| Ioniq 9 AWD Auto (A1) · All-Wheel Drive | 98 | 78 | 88 | $850 | — |
| Ioniq 9 AWD Performance Auto (A1) · All-Wheel Drive | 91 | 79 | 85 | $900 | — |
| Item | Miles | Time | Note |
|---|---|---|---|
| Tire rotation | 6,000–8,000 mi | 6–12 months | EVs wear tires faster (weight, torque) |
| Cabin air filter | 15,000–25,000 mi | 1–2 years | |
| Brake fluid | — | 2–4 years | Regen braking spares the pads, not the fluid |
| Battery coolant | Per manual | Per manual | Intervals vary widely by maker |
| 12V battery | — | 3–5 years |
3 safety recalls as of Nov 10, 2026, according to NHTSA. Recall repairs are free at a dealer. Check your VIN to see whether your car is included and whether the repair was done.
Owners filed 39 complaints with NHTSA. The most-cited components are electrical system (20), fuel/propulsion system (10), power train (7). Complaints are unverified owner reports and aren't adjusted for how many cars were sold.
The EPA rates the 2026 Hyundai Ioniq 9 at 85–92 mpg combined, depending on engine and drivetrain (3 versions rated).
NHTSA's New Car Assessment Program gives the 2026 Hyundai Ioniq 9 5 out of 5 stars overall.