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Recalls are issued for a make, model and model year. Whether the repair has already been done on one specific car is known only to its manufacturer and dealers. Check your vehicle's official status at nhtsa.gov/recalls or with a dealer.
US recalls (0)
No US recalls found for the 2018 Hyundai Ioniq.
Canadian recalls (3)
Show 3 Canadian recalls
Powertrain
2021-12-07 · campaign 2021-735
Issue:
On certain Ioniq EV models, the vehicle could accelerate after the accelerator pedal is released.
Note: This problem can only happen under certain conditions after the vehicle enters "fail-safe" mode.
Safety Risk:
A vehicle that continues to accelerate could create the risk of a crash.
Corrective Actions:
Hyundai will notify owners by mail and instruct you bring your vehicle to a dealer to update the electric power control unit (EPCU) software. The dealer will also add additional ground wiring between the drive motor/gear assembly and frame.
Electrical
2018-10-12 · campaign 2018-562 · 754 vehicles
On certain Hybrid and Plug-In Hybrid (PHEV) vehicles, the main relay contacts in the Power Relay Assembly located underneath the rear seat may have an inadequate connection. This could increase electrical resistance and generate heat, increasing the risk of fire causing injury and/or damage to property. Correction: Dealers will inspect the Power Relay Assembly for signs of thermal damage. If no thermal damage is found, the main relay will be replaced. If signs of thermal damage exist, the Power Relay Assembly will be replaced. Note: This problem may cause the Illumination of the HEV warning light while driving and/or an inability to start the vehicle.
Label
2018-01-16 · campaign 2018-032 · 245 vehicles
Certain Plug-In Hybrid (PHEV) vehicles may not comply with Canadian Motor Vehicle Safety Regulations. The compliance label may bear incorrect front and rear Gross Axle Weight Rating (GAWR) values. If the vehicle were to be loaded in excess of either GAWR value, it could lead to premature tire failure and/or vehicle overloading, which could increase the risk of a crash causing injury and/or damage to property. Correction: Hyundai will send a corrected GAWR label to current owners with instructions for proper placement. If owners are not comfortable installing the label themselves, they can take the label to a Hyundai dealer for installation.
Owner complaints (17)
Owners filed 17 complaints with NHTSA about the 2018 Hyundai Ioniq (2 crashes, 2 injuries reported). Among 6 model years of this model, it ranks #3 for the most complaints (median 17).
| Most-reported problem | Complaints | |
|---|
| Unknown or other | 4 | |
| Electrical system | 3 | |
| Engine | 3 | |
| Power train | 3 | |
| Vehicle speed control | 2 | |
| Visibility/wiper | 2 | |
| Service brakes | 1 | |
| Steering | 1 | |
Crash test ratings
NHTSA 5-Star Safety Ratings for the 2018 Hyundai Ioniq.
| Version | Overall | Frontal | Side | Rollover |
|---|
| 2018 Hyundai Ioniq Electric 5 HB FWD | – | – | – | – |
| 2018 Hyundai Ioniq Hybrid 5 HB FWD | – | – | – | – |
| 2018 Hyundai Ioniq Plug-In 5 HB FWD | – | – | – | – |
Fuel economy
EPA ratings for each 2018 Hyundai Ioniq version.
| Version | City MPG | Highway MPG | Combined | Yearly fuel cost |
|---|
| Ioniq 1.6 L Automatic (AM6) | 55 | 54 | 55 | $1,200 |
| Ioniq Blue 1.6 L Automatic (AM6) | 57 | 59 | 58 | $1,150 |
| Ioniq Electric Automatic (A1) | 150 | 122 | 136 | $550 |
| Ioniq Plug-in Hybrid 1.6 L Automatic (AM6) | 53 | 52 | 52 | $1,300 |
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Recalls, complaints, crash ratings and fuel economy as a JSON API. Decode up to 50 VINs per call and get a daily feed of new recalls.
Explore the API →Sources: NHTSA recalls, complaints and 5-Star Safety Ratings, US EPA fuel economy and Transport
Canada's Vehicle Recalls Database (contains information licensed under the Open Government Licence – Canada).
Recalls updated 2026-10-30.