The 2018 Hyundai Ioniq Plug-In Hybrid has 1 NHTSA recall campaign affecting an estimated 10,575 vehicles. Recall repairs are always free at any authorized dealer. Owners have filed 4 complaints with NHTSA, most often about the engine and engine cooling. Last updated July 5, 2026.
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…
Complaints by component
ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR
1
STRUCTURE
1
UNKNOWN OR OTHER
1
VISIBILITY/WIPER
1
Total complaints4
What owners report
Verbatim reports filed with NHTSA, lightly edited for readability and with personal
information removed.
“I am writing to dispute the denial of my paint defect warranty claim formally and to demand that hyundai motor america reconsider its decision. My 2018 hyundai ioniq (silver, vin: [xxx] ) is exhibiting significant paint bubbling — the identical defect that hyundai has already acknowledged and…”
“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…”
“Sunglass holder would randomly come down and block rear view mirror completely. Unable to see the back.”
“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…”
Defect investigations
InvestigationDP22005 Opened 2023-01-27 · closed 2023-08-07
Pedestrian alert sounds
NHTSA received a petition on or about July 18, 2022, requesting that Federal Motor Vehicle Safety Standard (FMVSS) 141 be applied to all electric and hybrid vehicles operating in the United States. The petition can be reviewed at NHTSA.gov under ODI Number 11486072. FMVSS 141 establishes performance requirements for…
Recall, complaint, and investigation records from official NHTSA datasets (FLAT_RCL,
FLAT_CMPL, FLAT_INV), synced weekly. Counts reflect NHTSA records for the 2018 Hyundai Ioniq Plug-In Hybrid as of
July 5, 2026. Complaint narratives are consumer-submitted and unverified. This page
contains ads and affiliate links. Full methodology.