Menu

2018 Hyundai Ioniq Plug-in HybridProblems, recalls & complaints

NHTSA has logged 4 owner complaints about the 2018 Hyundai Ioniq Plug-in Hybrid, most often about the engine and engine cooling. It is covered by 1 safety recall, and for recall 22V-459 the manufacturer reports only 59% of affected cars repaired.

–
CarFlaw IndexNot enough dataHigher is better (0–100)
Safety recalls1Lowest repair rate 59%Owner complaints40 with a crash, fire or injuryTop problem1Engine and engine cooling

Source: NHTSA complaints, recalls, investigations and manufacturer recall reports, through May 13, 2026. Updated daily.

Complaints by system

Where the 2018 Hyundai Ioniq Plug-in Hybrid has problems

4 complaints grouped by the system owners reported.

Box size = number of complaints naming that system. Darker = larger share. One complaint can name more than one system.
Complaints by system
SystemComplaintsCrash, fire or injury
Engine and engine cooling10
Structure10
Visibility/wiper10

Source: NHTSA Office of Defects Investigation. Complaints are submitted by the public and are not verified by NHTSA.

1 recall

2018 Hyundai Ioniq Plug-in Hybrid recalls and how many were fixed

Each ring shows the share of affected cars repaired, from the manufacturer’s latest quarterly report to NHTSA. Recall repairs are free at authorized dealers.

Recalls apply to specific cars. To see whether a recall is still open on yours, enter the 17-character VIN at nhtsa.gov/recalls or with Hyundai.

Best & worst years

2018 vs. every other Ioniq Plug-in Hybrid year

Bars show complaints per model year. Colors show the CarFlaw verdict: complaints weighted for crashes, fires and injuries, adjusted for years on the road and compared with the Ioniq Plug-in Hybrid median. How we score

'17'18'19'20'21'22
  • Avoid
  • Caution
  • Solid
  • Best
  • Not rated
1 investigation

NHTSA defect investigations

Federal investigations that included the 2018 Hyundai Ioniq Plug-in Hybrid, and the recalls they led to.

  1. Pedestrian alert soundsDP22005 · closed Aug 7, 2023
    Led to recall 22V-063
In owners' words

What Ioniq Plug-in Hybrid owners report

Recent engine and engine cooling complaints filed with NHTSA, shortened. Personal details are removed.

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…
Complaint 11439532 · Nov 5, 2021

Own a 2018 Ioniq Plug-in Hybrid?

Decode your VIN to see the recalls for your exact car, then confirm open recalls with NHTSA.