Hyundai IONIQ 9 problems and owner complaints
Explore the records behind recurring owner reports.
Key facts
33 owner complaints analyzed
2 distinct recall campaigns
12,000 mi median reported failure mileage
Scope: 2026 to 2026 model years. Data snapshot: . 1 complaints include usable failure mileage.
This selection has limited data. It remains available for lookup but is excluded from search indexing.
Most common problems
Electrical System is the most frequently named component, appearing in 20 of 33 complaints (60.6%). A complaint can name multiple components.
| Topic | Matching reports | Share of complaints |
|---|---|---|
| Electrical and battery issues | 11 | 33.3% |
| Braking behavior | 4 | 12.1% |
| Steering behavior | 4 | 12.1% |
| Engine operation | 1 | 3.0% |
Topic matches use published keyword rules. They describe mentions, including negations or comparisons, and do not confirm a diagnosis. Read the matching rules.
Component breakdown
Number of unique complaints naming each component. Top eight shown.
| Category | Count |
|---|---|
| Electrical System | 20 |
| Fuel/Propulsion System | 9 |
| Power Train | 6 |
| Vehicle Speed Control | 4 |
| Forward Collision Avoidance: Adaptive Cruise Control | 3 |
| Forward Collision Avoidance: Automatic Emergency Braking | 3 |
| Forward Collision Avoidance: Warnings | 3 |
| Engine | 2 |
Electrical System: 20; Fuel/Propulsion System: 9; Power Train: 6; Vehicle Speed Control: 4; Forward Collision Avoidance: Adaptive Cruise Control: 3; Forward Collision Avoidance: Automatic Emergency Braking: 3; Forward Collision Avoidance: Warnings: 3; Engine: 2
Reported problems by failure mileage
Complaint counts in mileage bands. These are not failure rates per vehicle or mile.
| Category | Count |
|---|---|
| Under 25,000 | 1 |
| 25,000 to 49,999 | 0 |
| 50,000 to 74,999 | 0 |
| 75,000 to 99,999 | 0 |
| 100,000 to 149,999 | 0 |
| 150,000 and above | 0 |
Under 25,000: 1; 25,000 to 49,999: 0; 50,000 to 74,999: 0; 75,000 to 99,999: 0; 100,000 to 149,999: 0; 150,000 and above: 0
Under 25,000 miles has the most reports with usable mileage (1). 32 complaints have missing, zero or invalid mileage.
Complaints over time
Year the complaint was filed, not the vehicle model year or incident year. The snapshot year is partial.
| Category | Count |
|---|---|
| 2025 | 4 |
| 2026 | 29 |
2025: 4; 2026: 29
Pattern summary
Electrical System leads the component reports. Electrical and battery issues appears in 11 complaint narratives. Braking behavior appears in 4 complaint narratives. Steering behavior appears in 4 complaint narratives. Use these patterns to inspect individual reports and prepare questions for a mechanic.
Calculated from recorded counts. An AI narrative has not been published for this selection.
Complaint evidence
Examples provide context, not a representative sample or a verified diagnosis.
Owner report 11669628 · 2025-06-27 (June 27, 2025)
My ICCU failed, which caused a fuse to blow and some electrical wiring in the car to melt. This caused the car to completely deplete the 12V battery, which left the car completely inoperable. The vehicle was towed to a Hyundai dealership, where they ordered the relevant parts and changed them under warranty. I was without the car for roughly two weeks.
Owner-reported narrative. Look up ODI 11669628 at NHTSA ↗
Owner report 11708703 · 2026-01-04 (January 4, 2026)
The vehicle was plugged in overnight. To the set 80% limit. When I got up to leave for work and take family out. The vehicle check electrical system warning ⚠️ came on and the then the vehicle would not drive past 41mph. Then in a few minutes dropped down to 28mph and would not go any further. Took the car to dealership which was miles away and 18 miles per hour was my top speed when I pulled in to the dealership lot. This was one day after I had dropped the car off for a route 7K mile tire rotation and filter change. They claimed they toppe…
Owner-reported narrative. Look up ODI 11708703 at NHTSA ↗
Owner report 11700195 · 2025-11-18 (November 18, 2025)
When my Ioniq 9 was in reverse, the brake did not work. The car kept rolling and I had to turn it off to stop the car.
Owner-reported narrative. Look up ODI 11700195 at NHTSA ↗
Owner report 11735039 · 2026-05-01 (May 1, 2026)
On April 23, 2026, while driving my 2026 Hyundai Ioniq 9 , the Automatic Emergency Braking system completely failed to detect an oncoming hazard. The system did not alert me, did not activate, and did not apply emergency braking. I nearly collided with another vehicle as a direct result of this failure. The vehicle has a persistent diagnostic trouble code C28AB87 , CAN time-out for the front radar unit , which disables critical Advanced Driver Assistance Systems including Automatic Emergency Braking, collision avoidance, and Smart/Adaptive Crui…
Owner-reported narrative. Look up ODI 11735039 at NHTSA ↗
Owner report 11689514 · 2025-09-24 (September 24, 2025)
Occasionally while driving my IONIQ 9 in sunny conditions with glasses on while utilizing Lane Keep Assist and the Adaptive Cruise Control system the car flashes a Warning about keeping your attention on the road, and then continues on beeping and chiming before ultimately completely stopping in the middle of the road unless you disengage the Lane Keeping Assist and Adaptive Cruise Control. I believe the sensors on top of the Steering Wheel aren’t calibrated that great for people who wear glasses, as this issue does not occur when I take my gla…
Owner-reported narrative. Look up ODI 11689514 at NHTSA ↗
Owner report 11705434 · 2025-12-16 (December 16, 2025)
While driving on the freeway utilizing Highway Drive Assist, I suddenly received a warning on the heads up display stating that assisted systems were unavailable, at which point the Adaptive Cruise Control & Lake Keep Assist both deactivated. I pressed the button on the steering wheel to reactive the system and received "conditions not met" error. At this point, I placed my foot on the accelerator and it was completely unresponsive. I stabbed at hte accelerator as well as held it down without issue. Regenerative breaking also did not reacti…
Owner-reported narrative. Look up ODI 11705434 at NHTSA ↗
Owner report 11741955 · 2026-06-04 (June 4, 2026)
On XXX, my 2025 Hyundai Ioniq 9 displayed a battery fault warning (DTC P1AAF00). I was instructed by Hyundai to bring the vehicle to a dealership immediately as other Ioniq 9 owners had experienced sudden and complete loss of motive power during highway operation. The vehicle has been at Pacifico Hyundai in [XXX] since that date. I was initially told the battery control module required replacement with only 7 units available nationwide. On May 5 I was informed via text that the entire high voltage battery pack requires replacement with no relea…
Owner-reported narrative. Look up ODI 11741955 at NHTSA ↗
Recalls by model year
All campaigns in the snapshot affecting each model year, including recalls announced years later.
Recall campaigns
Shared campaigns appear once in each affected model year.
| Category | Count |
|---|---|
| 2026 | 2 |
2026: 2
Year-by-year records
| Model year | Complaints | Recalls | Change in recalls |
|---|---|---|---|
| 2026 | 33 | 2 | Not available |