2018 Hyundai Ioniq
The Verdict
Worst problem area
Engine
Engine leads by volume: 4 of 17 complaints (24%) mention it. Complaints mentioning Airbags & Restraints include more reported injuries (2) than those mentioning any other identified area.
Complaints filed fell from 50 in 2017 to 17 in 2018.
Data last changed . Sources: NHTSA complaints and recalls, EPA fuel economy data. Methodology
Cost, Fuel Economy & Complaint History
| Category | 2017 | 2018 | 2019 | 2020 | vs. 2018 Large Cars |
|---|---|---|---|---|---|
| Annual fuel cost ($) | 1,100–1,150 | 1,100–1,200 | 1,100–1,200 | 1,100–1,200 | |
| Combined MPG | 55–58 | 52–58 | 52–58 | 52–58 | |
| City / Highway MPG | 55–57 / 54–59 | 53–57 / 52–59 | 53–57 / 52–59 | 53–57 / 52–59 | |
| CO₂ tailpipe (g/mi) | 154–163 | 154–163 | 154–163 | 154–163 | |
| Complaints filed | 50 | 17 | 32 | 29 | |
| Recalls issued | 5 | 3 | 2 | 1 | |
| Crash-involved complaints | 5 | 2 | 9 | 6 | |
| Fire-involved complaints | 3 | 0 | 1 | 2 | |
| Injuries reported | 1 | 2 | 10 | 2 | |
| Deaths reported | 0 | 0 | 0 | 0 | |
| Configurations compared | 2 | 2 | 2 | 2 |
Not compared: this database has no vehicle sales or registration figures, so a raw count mostly reflects how many were sold, not how safe the vehicle is.
Common questions
How many recalls does the 2018 Hyundai Ioniq have?
3 NHTSA recall campaigns as of Sep 16, 2026. Check your VIN with NHTSA to see whether one applies to your car.
What is the most common complaint about the 2018 Hyundai Ioniq?
Engine: 4 of 17 NHTSA complaints (24%) mention it.
What gas mileage does the 2018 Hyundai Ioniq get?
EPA rates it 52–58 MPG combined.
How much does it cost to fuel a 2018 Hyundai Ioniq?
EPA estimates $1,100–$1,200 a year in fuel costs, using EPA's assumptions.
Similar Vehicles
EPA-Rated Configurations (4)
| Configuration | Transmission | Cylinders | Displacement | Drivetrain | Fuel Type | Vehicle Class | City | Highway | Combined | Annual Fuel Cost | CO₂ |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Configuration 1 | Automatic (AM6) | 4 | 1.6L | Front-Wheel Drive | Regular | Large Cars | 57 mpg (high) | 59 mpg (high) | 58 mpg (high) | $1,100 (low) | 154 g/mi (low) |
| Configuration 2 | Automatic (AM6) | 4 | 1.6L | Front-Wheel Drive | Regular | Large Cars | 55 mpg | 54 mpg | 55 mpg | $1,150 | 163 g/mi (high) |
| Configuration 3 | Automatic (A1) | — | — | Front-Wheel Drive | Electricity | Midsize Cars | 150 MPGe | 122 MPGe | 136 MPGe | $550 | 0 g/mi |
| Configuration 4 | Automatic (AM6) | 4 | 1.6L | Front-Wheel Drive | Regular Gas and Electricity | Midsize Cars | 53 mpg (low) | 52 mpg (low) | 52 mpg (low) | $1,200 (high) | 75 g/mi |
Complaints by Category
| Category | Complaints | Crash-Involved | Fire-Involved | Injuries | Deaths |
|---|---|---|---|---|---|
| Engine | 4 | 0 | 0 | 0 | 0 |
| Transmission & Drivetrain | 3 | 1 | 0 | 0 | 0 |
| Fuel System | 0 | 0 | 0 | 0 | 0 |
| Electrical | 3 | 0 | 0 | 0 | 0 |
| Brakes | 1 | 0 | 0 | 0 | 0 |
| Steering | 1 | 0 | 0 | 0 | 0 |
| Suspension, Wheels & Tires | 0 | 0 | 0 | 0 | 0 |
| Airbags & Restraints | 1 | 1 | 0 | 2 | 0 |
| Driver Assistance & Speed Control | 2 | 0 | 0 | 0 | 0 |
| Body, Seats & Latches | 1 | 0 | 0 | 0 | 0 |
| Visibility & Lighting | 2 | 0 | 0 | 0 | 0 |
| Other | 4 | 0 | 0 | 0 | 0 |
A complaint that names more than one category is counted in each, so the rows can add up to more than the total number of complaints.
Recalls (3)
HYBRID PROPULSION SYSTEM: INVERTER · Campaign 22V459000 · Jun 28, 2022
Defect: Hyundai Motor America (Hyundai) is recalling certain 2017-2018 Ioniq HEV and Ionic PHV vehicles previously recalled under recall number 18V-704. The Power Relay Assembly (PRA) located underneath the rear seat may overheat.
Consequence: An overheated PRA increases the risk of a fire.
Remedy: Dealers will inspect and replace the main relay or PRA, as necessary, free of charge. Owner notification letters were mailed August 23, 2022. Owners may contact Hyundai customer service at 1-855-371-9460. Hyundai's number for this recall is 232. This recall replaces NHTSA recall number 18V-704. Vehicles already repaired under the previous recall will need to have the new remedy completed.
ELECTRICAL SYSTEM:SOFTWARE; ELECTRICAL SYSTEM:PROPULSION SYSTEM:CHARGING:MODULE:ONBOARD (OBCM) · Campaign 21V944000 · Dec 8, 2021
Defect: Hyundai Motor America (Hyundai) is recalling certain 2017-2019 Ioniq electric vehicles. An unstable electrical ground may cause the vehicle to enter a fail-safe mode with reduced acceleration and power. In certain conditions while in fail-safe mode, the vehicle may accelerate after the gas pedal is released.
Consequence: Unexpected acceleration following gas pedal release can increase the risk of a crash.
Remedy: Dealers will update the EPCU (Electric Power Control Unit) software and repair the ground wiring, free of charge. Owner notification letters were mailed February 9, 2022. Owners may contact Hyundai customer service at 1-855-371-9460. Hyundai's number for this recall is 215.
HYBRID PROPULSION SYSTEM: INVERTER · Campaign 18V704000 · Oct 12, 2018
Defect: Hyundai Motor America (Hyundai) is recalling certain 2017-2018 Hyundai Ioniq Hybrid and 2018 Ioniq Plug-In Hybrid vehicles. The Main Relay within the Power Relay Assembly (PRA) may have inadequate connections between its contacts, causing increased electrical resistance.
Consequence: The increased electrical resistance can overheat the rear seat which is above the PRA, increasing the risk of a fire.
Remedy: Hyundai will notify owners, and dealers will inspect the Power Relay Assembly (PRA) for damage. If no damage is found, the main relay will be replaced. If damage is found, the PRA will be replaced. These repairs will be performed free of charge. The recall began February 28, 2019. Owners may contact Hyundai customer service at 1-855-371-9460. Hyundai's number for this recall is 178.