Total Complaints
3 filings
HYUNDAI IONIQ PLUG-IN HYBRID · model year
2018 HYUNDAI IONIQ PLUG-IN HYBRID
3 NHTSA complaints, and 1 recall campaign listed for this cohort. A VIN lookup is required to determine whether a specific vehicle has an unrepaired recall.
NHTSA overall rating
Not crash-tested
New Car Assessment Program
The 2018HYUNDAIIONIQ PLUG-IN HYBRID carries 3 consumer safety complaints in NHTSA's Office of Defects Investigation database for this specific model-year cohort. Within that volume, owners reported 0 crashes, 0 fires, 0 injuries, and 0 fatalities. No NCAP 5-star crash-test rating is available for this model year in the federal database.
The most frequently selected component label in reports for the 2018 IONIQ PLUG-IN HYBRID is engine and engine cooling:exhaust system:emission control:catalytic convertor with 1 filings, followed by visibility/wiper (1) and structure (1). Complaint categories reflect owner reports and intake categorization; they do not establish a defect pattern or cause. This cohort has 1 NHTSA recall campaign listed below. Enter a VIN in NHTSA's official recall lookup to determine whether a specific vehicle has an unrepaired recall.
NHTSA currently has 37 investigation files overlapping the 2018 IONIQ PLUG-IN HYBRID, and 1 remain open. Owners comparing this cohort against neighboring years should read the complaint-by-year trend as report volume, not a causal diagnosis. Use the related-complaint feed and the official recall lookup when researching a specific vehicle.
3
Complaints
0
Crashes
0
Fires
0
Injuries
0
Deaths
Crashes Reported
0 reports
Source
NHTSA ODI
Federal complaints database
Complaints vs. fleet median (215)
At or below the fleet median complaint volume.
Complaints by Component
| Component | Count |
|---|---|
| ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR | 1 |
| VISIBILITY/WIPER | 1 |
| STRUCTURE | 1 |
Recalls (1)
22V45900028/06/2022
HYBRID PROPULSION SYSTEM: INVERTER
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.
Recent Complaints
20220705STRUCTURE
The contact owns a 2018 Hyundai Ioniq Hybrid. The contact stated that upon inspection, it was discovered that both the passenger’s side front and rear carpets had become soaked with water and condensation from the operation of the air conditioning unit. The contact was also concerned that mold was present due to the failure. The local dealer was contacted and a service appointment was scheduled. The manufacturer was not yet notified. The failure mileage was 12,000.
Mileage: 12,000
20220114VISIBILITY/WIPER
Sunglass holder would randomly come down and block rear view mirror completely. Unable to see the back.
20211105ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR
I have put around 31K miles in my car. Day before yesterday ( Nov-2 ) when I was driving back home from work, suddenly I heard a noise. I pulled over and stopped the car. when I got down and checked, I noticed exhaust system or something similar to that fell off and touching the road. I have seen similar issues posted in Hyundai Ioniq forums https://www.ioniqforum.com/threads/very-dissapointed.37027/ https://www.ioniqforum.com/threads/first-issue-exhaust-fell-off-at-21k-miles-2019-phev.35092/ I will attach few pictures that I took during this incident.
Compare 2018HYUNDAIIONIQ PLUG-IN HYBRID to Similar Vehicles
NHTSA Investigations 1 Open
Frequently Asked Questions
How many complaints does the 2018 HYUNDAI IONIQ PLUG-IN HYBRID have?▼
The 2018 HYUNDAI IONIQ PLUG-IN HYBRID has 3 NHTSA complaints, 0 crashes, 0 fires, 0 injuries, and 0 deaths reported.
Are there any recalls for the 2018 HYUNDAI IONIQ PLUG-IN HYBRID?▼
Yes, the 2018 HYUNDAI IONIQ PLUG-IN HYBRID has 1 recall(s). The most common affected component is HYBRID PROPULSION SYSTEM: INVERTER. Recalls are issued by NHTSA and manufacturers must provide a free remedy.
What are the most common problems with the 2018 HYUNDAI IONIQ PLUG-IN HYBRID?▼
The most-complained component for the 2018 HYUNDAI IONIQ PLUG-IN HYBRID is ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR with 1 complaints. Other frequently reported areas include VISIBILITY/WIPER and STRUCTURE.
Is the 2018 HYUNDAI IONIQ PLUG-IN HYBRID safe to buy?▼
Review the complaint history, crash and fire reports, safety ratings, and recall status on this page to make an informed decision. No NHTSA crash test rating is available for this model year. Compare with other model years using the links above.
Where does this data come from?▼
All complaint, recall, and safety rating data is sourced from the National Highway Traffic Safety Administration (NHTSA). Complaints are filed by vehicle owners through NHTSA's Office of Defects Investigation.
Vehicle Safety Guides
Data vintage: August 2026. Sources: NHTSA Office of Defects Investigation (ODI) complaints database, NHTSA recall campaign API, NHTSA NCAP crash-test ratings, and NHTSA FARS for fatality cross-reference.
Every figure on PlainCars is rendered directly from NHTSA complaint and safety data, no number is typed in by an editor. This year-specific record is rendered from NHTSA ODI, recall, and NCAP rows for the 2018 HYUNDAI IONIQ PLUG-IN HYBRID; no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of August 2026.
Read our methodology - how this data is sourced, computed, and verified.