NHTSA vehicle safety data

2018 Hyundai Ioniq Plug-In Hybrid Recalls & Complaints

The 2018 Hyundai Ioniq Plug-In Hybrid has 1 NHTSA recall campaign and 4 owner complaints on file as of November 3, 2026. Recall repairs are usually free at an authorized Hyundai dealer.

NHTSA recall and complaint data for the 2018 Hyundai Ioniq Plug-In Hybrid. Recall data is refreshed daily from NHTSA.

2018 Hyundai Ioniq Plug-In Hybrid owner complaints

Owners have filed 4 complaints with NHTSA about the 2018 Hyundai Ioniq Plug-In Hybrid, describing incidents dated November 2, 2021 to May 11, 2023.

Most-cited components

  • Engine 1 complaint
  • Structure 1 complaint
  • Unknown or Other 1 complaint
  • Visibility/Wiper 1 complaint

Newest complaints

  • ODI #11737631 · Filed

    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…

  • ODI #11472321 · Filed

    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…

  • ODI #11447542 · Filed

    Sunglass holder would randomly come down and block rear view mirror completely. Unable to see the back.

Read all 4 complaints

NHTSA defect investigations

NHTSA's investigations file lists the 2018 Hyundai Ioniq Plug-In Hybrid in 1 investigation. A listed model year means only that an investigation names it; it says nothing about any particular vehicle. An open investigation is not a finding that a safety defect exists, and NHTSA can close one without a recall.

Open and recently closed NHTSA defect investigations

Power Relay Under Rear Seat May Cause Fire

NHTSA #22V459000 · Hybrid Propulsion System — Inverter · NHTSA notice

Reported June 28, 2022 · Hyundai Motor America

Potentially affected: 10,575 vehicles

Repair completion: 72.71% (latest rate the manufacturer reported to NHTSA; dataset updated November 3, 2026)

Hyundai campaign 232 · Owners notified August 23, 2022

Defect description

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.

Safety consequence

An overheated PRA increases the risk of a fire.

Manufacturer 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.

Notes

Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.

Other Hyundai Ioniq Plug-In Hybrid model years

Check your 2018 Hyundai Ioniq Plug-In Hybrid VIN

Not every recall applies to every VIN in a given year. Enter the 17-character VIN from your Hyundai Ioniq Plug-In Hybrid at nhtsa.gov/recalls to see whether your specific vehicle has an unrepaired recall.

Check a Hyundai VIN