2018 Hyundai Ioniq Plug-In Hybrid problems, complaints & recalls
Most-reported problem areas: Visibility/Wiper (1) · Structure (1) · Engine And Engine Cooling:exhaust System:emission Control:catalytic Convertor (1)
Safety recalls (1)
Hybrid Propulsion System: Inverter 2022-06-28 · campaign 22V459000 · 10,575 vehicles
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.
Risk: An overheated PRA increases the risk of a fire.
Fix: 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.
Service bulletins (46)
Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.
Engine 2026-10-08 · 26-EM-016H TSB · Service Bulletin/Repair Instructions
some vehicles equipped with internal combustion engines may exhibit higher-than-expected engine oil consumption. this bulletin outlines the combustion chamber cleaning procedure for vehicles diagnosed with this condition. all internal combustion engines consume some engine oil during normal operatio
Engine 2026-10-07 · 26-EM-015H TSB · Service Bulletin/Repair Instructions
certain vehicles equipped with internal combustion engines may exhibit higher-than-expected engine oil consumption. this bulletin provides the inspection and repair procedures for vehicles exhibiting this condition. all internal combustion engines consume engine oil as part of normal engine operatio
Air Bags 2026-04-10 · DTN DL · Other
the national highway traffic safety administration (nhtsa) has identified the presence of substandard and dangerous driver’s-side airbag inflators manufactured by jilin province detiannuo automobile safety system co., ltd. (dtn). these inflators were not supplied, approved, or authorized by the vehi
Air Bags 2026-04-10 · DTN DCS · Other
the national highway traffic safety administration (nhtsa) has issued an urgent safety advisory regarding dangerous, counterfeit driver‑side airbag inflators manufactured by jilin province detiannuo automobile safety system co., ltd. (dtn), that have been identified in u.s. vehicles following prior
Exterior Lighting 2025-11-06 · 25-BD-012H TSB · Service Bulletin/Repair Instructions
this bulletin provides information regarding condensation related to the accumulated moisture in the headlamp, rear combination lamp, daytime running lamp (drl), or fog lamp. this tsb illustrates the various causes of condensation inside the lamp assembly. lamp assembly replacement is not necessary
Electrical System 2025-05-08 · 25-01-024H-1 TSB · Service Campaign
some vehicles may exhibit a loss of connectivity or interruptions in the middle of using bluelink service functions. this may be due to an irregular disconnection on verizon’s communication network. follow the procedure in this tsb to reestablish the connection via the avn pinhole reset method.
Showing the 6 most recent of 46 bulletins. Search all of them free at nhtsa.gov.
What owners report
2026-05-13 · Unknown Or Other“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 accepted responsibility for in white-painted vehicles ac…”
2022-07-05 · Structure · 12,000 mi“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 co…”
2022-01-14 · Visibility/Wiper“sunglass holder would randomly come down and block rear view mirror completely. unable to see the back. …”
2021-11-05 · Engine 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…”
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.