Head-to-head reliability
Hyundai Ioniq 9 vs Honda Accord
How the Hyundai Ioniq 9 and Honda Accord compare on NHTSA complaints, recalls and crash reports — and which is the lower-risk used buy.
Based on NHTSA owner-complaint & recall records
Hyundai Ioniq 9 vs Honda Accord: The Ioniq 9 has 33 complaints per year, with issues like ICCU failures and sudden power loss, while the Accord has 443.8 per year, including engine and braking problems. The Ioniq 9 has 2 recalls, the Accord 38. Source: NHTSA owner complaints.
The picture
Is the Hyundai Ioniq 9 or Honda Accord more reliable?
A plain-English read on what the NHTSA record says about living with each vehicle.
Hyundai Ioniq 9
The Hyundai Ioniq 9 is a new EV with a short but intense complaint history, averaging 33 complaints per year. Owners report serious electrical and propulsion system failures, including ICCU failures and sudden loss of power, often accompanied by warning messages. These issues can leave drivers stranded or facing unexpected braking, making early ownership potentially stressful.
Honda Accord
The Honda Accord, with a decade of data, shows a high volume of complaints (443.8 per year) but covers a wide range of issues. Engine problems, electrical glitches, and forward collision avoidance malfunctions are common, with some reports of sudden power loss and unintended braking. While many complaints are minor, the sheer number and variety suggest a need for thorough inspection.
The numbers
Side-by-side NHTSA record
Lower is better in every category. The highlighted cell is the stronger result.
| Category | Hyundai Ioniq 9 | Honda Accord |
|---|---|---|
| Total complaintsAll model years combined | 33 Better | 4,438 |
| Safety recallsFederal recall campaigns | 2 Better | 38 |
| Crash reportsCrash-related complaints | 0 Better | 160 |
| Complaints per yearAveraged across model years | 33.0 Better | 443.8 |
| Reported injuriesTied to owner complaints | 4 Better | 144 |
| Reported deathsTied to owner complaints | 0 Better | 3 |
Source: NHTSA owner complaints & recall records.
What actually goes wrong
The problems owners report
The most-complained-about systems on each vehicle — what fails, and what owners say in their own words.
Hyundai Ioniq 9
- 01ELECTRICAL SYSTEM20
- 02FUEL/PROPULSION SYSTEM9
- 03POWER TRAIN6
- 04FORWARD COLLISION AVOIDANCE5
- 05VEHICLE SPEED CONTROL4
Owners report Integrated Charging Control Unit (ICCU) failures and 'Check Electrical System' warnings, sometimes leading to loss of propulsion or charging issues. This can leave you stranded or require costly repairs.
Sudden loss of propulsion and unintended emergency braking at highway speeds are reported, often with warning messages. This is a serious safety concern that could cause accidents.
ICCU failures also appear under powertrain, causing the vehicle to lose power or not charge properly. Additionally, driver assistance systems like adaptive cruise control may deactivate unexpectedly.
Automatic Emergency Braking may either fail to activate when needed or trigger unexpectedly, leading to near-misses or sudden stops. This inconsistency is alarming for drivers.
“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. T…”
“On 8/3/26 my Ioniq 9 had a warning message to Check the Electrical System, but provided no additional information. I was able to drive the car home, anticipating that I be able to take it in to the Hyundai dealer where i purchased the vehicle. It should be no…”
Honda Accord
- 01ENGINE985
- 02ELECTRICAL SYSTEM863
- 03FORWARD COLLISION AVOIDANCE821
- 04UNKNOWN OR OTHER725
- 05SERVICE BRAKES592
Owners report unusual noises, loss of power, and warning lights for brakes and hill descent. Some experience sudden speed loss, which can be dangerous in traffic.
Issues include TPMS warnings leading to tire failures and rodent damage to wiring harnesses, causing electrical malfunctions. These can be intermittent and hard to diagnose.
The system may falsely trigger or fail to detect obstacles, causing unintended braking or lack of braking. Owners also report intermittent warnings for adaptive cruise and lane keeping.
Brake-related complaints include sudden braking events and system failures, sometimes linked to the ABS or traction control. This can increase the risk of rear-end collisions.
“I purchased this vehicle at 0 miles in July 2025 from Honda Accord in Pensacola Florida. I reported in July 2025 that there was a noise and I was unhappy with the vehicle and would like to exchange the vehicle within the 30 days months later, the noise got lo…”
“Vehicle drove normally in the morning commute. In the afternoon commute it started normally and as i approached highway speeds the alarms started showing up. the Brake, hill descent system, abs, critical failure. the vehicle started losing speed and could not…”
Official recalls
Safety recalls on record
Federal recall campaigns — the defect, the risk, and the fix. Confirm any open recall was completed before you buy.
Hyundai Ioniq 9 — 2 recalls
The defect: 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.
The risk: An electrical short in the high voltage battery system increases the risk of a fire.
The fix: Dealers will inspect and tighten the bus bar retention bolts and replace the battery system assembly, as necessary, free of charge. Owner notification letters were mailed April 3, 2026. Owners may contact Hyundai customer service at 1-855-…
The defect: 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.
The risk: A loss of vehicle control increases the risk of a crash.
The fix: Dealers will inspect and replace the rear suspension fasteners and perform a rear vehicle alignment, as necessary, free of charge. Owner notification letters are expected to be mailed July 17, 2026. Owners may contact Hyundai customer serv…
Honda Accord — 38 recalls
The defect: Honda (American Honda Motor Co.) is recalling certain 2023-2025 Honda Accord Hybrid vehicles. Due to a software error, the integrated control module (ICM) central processing unit (CPU) may reset while driving, causing a loss of drive power.
The risk: A loss of drive power increases the risk of a crash or injury.
The fix: Dealers will reprogram the ICM CPU software, free of charge. Owner notification letters were mailed January 6, 2026. Owners may contact Honda's customer service at 1-888-234-2138. Honda's number for this recall is TN2. Vehicle Identificati…
The defect: Honda (American Honda Motor Co.) is recalling certain 2023-2026 CR-V Hybrid, Accord Hybrid, and 2025-2026 CR-V Fuel Cell EV vehicles. When using the tire repair kit, pressure may build within the sealant bottle, causing the bottle cap to detach.
The risk: A detached bottle cap can become a projectile and strike the user or others nearby, increasing the risk of injury.
The fix: Dealers will replace the tire repair kit nozzle or sealant bottle, free of charge. Interim letters notifying owners of the safety risk were mailed July 27, 2026. Additional letters will be sent once the final remedy is available, anticipat…
The defect: Honda (America Honda Motor Co.) is recalling certain 2023 Civic, Acura RDX, Acura Integra, and 2022 Honda Accord vehicles. A ball valve in the vehicle stability assist (VSA) modulator may leak brake fluid, which can result in unintended vehicle movement when the brake hold feature is engaged or an…
The risk: Unintended vehicle movement or an unexpected increase in brake pedal travel can increase the risk of a crash or injury.
The fix: Dealers will replace the VSA modulator, free of charge. Owner notification letters were mailed July 24, 2023. Owners may contact Honda customer service at 1-888-234-2138. Honda's numbers for this recall are OEJ, XEK, AEY, XEX and OEW.
The defect: Honda (American Honda Motor Co.) is recalling certain 2020-2022 Pilot, Accord, Civic sedan, HR-V, Odyssey, 2020 Civic coupe, Fit, 2021-2022 Civic hatchback, 2021 Civic Type R, Insight, 2020-2021 CR-V, CR-V Hybrid, Passport, Ridgeline, Accord Hybrid, 2020 Acura MDX, 2022 Acura MDX, 2020-2022 Acura R…
The risk: An air bag that deploys unintentionally during a crash can increase the risk of injury.
The fix: Dealers will replace the seat weight sensors, free of charge. Owner notification letters were mailed March 28, 2024. This is a phased recall. Owners may contact Honda customer service at 1-888-234-2138. Honda's numbers for these recalls ar…
Buyer analysis
Hyundai Ioniq 9 or Honda Accord: which should you buy?
The Hyundai Ioniq 9 has far fewer complaints per year (33 vs 443.8), but its issues are concentrated in critical systems like electrical and propulsion, which can be more severe. The Accord's higher volume includes many minor issues, but also serious safety-related complaints. In practice, the Ioniq 9 may offer a more modern experience but with potential for major failures, while the Accord has a longer track record but more frequent problems.
Key differences
- The Ioniq 9 has a much lower complaint rate (33/yr) but its issues are often severe, like sudden power loss and ICCU failures, while the Accord's higher rate (443.8/yr) includes many minor electrical and sensor glitches.
- The Ioniq 9's forward collision avoidance system has reports of both false activations and failures to detect, whereas the Accord's system also shows similar inconsistencies but with more data.
- The Accord has a longer history with 38 recalls, covering software, brakes, and airbags, while the Ioniq 9 has only 2 recalls, but its complaints suggest potential for more.
- The Ioniq 9 is an EV, so its propulsion issues are tied to battery and charging systems, while the Accord's engine problems are traditional, including noise and power loss.
- Check for any 'Check Electrical System' warnings or history of ICCU failure, as this is a common and serious issue.
- Test the forward collision avoidance system in a safe area to ensure it doesn't brake unexpectedly or fail to respond.
- Look for signs of rodent damage to wiring harnesses, especially if the car is parked outdoors, as this can cause electrical issues.
- Verify that the forward collision avoidance system works correctly by testing it at low speeds, as false activations are reported.
Before you buy
- Obtain a full service history and check for any open recalls on both vehicles.
- For the Ioniq 9, ask about any software updates related to the ICCU or propulsion system.
- For the Accord, inspect the engine bay for rodent damage and check the condition of wiring harnesses.
- Test drive both vehicles at highway speeds to see if any warning lights or unexpected braking occur.
- Have a trusted mechanic perform a pre-purchase inspection, focusing on electrical and braking systems.
Year by year
Which model years to avoid
Complaints per model year for both vehicles — lower is better. The spikes are the years to scrutinize.
| Year | Hyundai Ioniq 9 | Honda Accord |
|---|---|---|
| 2026 | 33 | 5 |
Check the actual car
Comparing models is smart. Checking the VIN is essential.
Brand averages tell you the trend. A VIN check tells you what's wrong with the specific Hyundai Ioniq 9 or Honda Accord in front of you — accident history, open recalls and title records.
Go deeper
Full reliability reports
- Comparison
- Hyundai Ioniq 9 vs Honda Accord
- Hyundai Ioniq 9 total complaints
- 33
- Honda Accord total complaints
- 4,438
- Hyundai Ioniq 9 total recalls
- 2
- Honda Accord total recalls
- 38
- Hyundai Ioniq 9 avg complaints/year
- 33.0
- Honda Accord avg complaints/year
- 443.8
- More reliable overall
- Hyundai Ioniq 9
- Hyundai Ioniq 9 top complaint area
- ELECTRICAL SYSTEM
- Honda Accord top complaint area
- ENGINE