2021 Hyundai Ioniq Plug-In Hybrid problems, complaints & recalls
Most-reported problem areas: Vehicle Speed Control (1) · Service Brakes (1) · Seat Belts (1)
Safety recalls (0)
No recalls on record for this model year (campaigns announced since 2010).
Service bulletins (9)
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 2025-09-30 · 25-BE-020H TSB · Service Bulletin/Repair Instructions
this bulletin provides information related to the changes introduced in the 2025 1st navigation map and software update. the changes may vary depending on vehicle type, model, and navigation system as described in this tsb.
Showing the 6 most recent of 9 bulletins. Search all of them free at nhtsa.gov.
What owners report
2026-05-26 · Seat Belts“installing a car seat and the belt buckle failed. the plastic part split and no longer holds the belt together. this was under regular pressure with standard leverage that the car seat design calls for. nothing was ever on top of the buckle and it is not damaged in any other way at all other than the failure. they refused to replace it via warranty…”
2025-07-31 · Service Brakes“auto hold/epb lights come one while driving. deactivates cruise control of on. turns off auto hold. ongoing issue with many reports but no recall or dealership knowledge. ongoing issue since purchase.…”
2025-07-15 · Unknown Or Other“the "auto hold" feature on my hyundai ioniq malfunctioned, displaying a dashboard warning: "auto hold conditions not met. press brake pedal." this message randomly appears while driving or stopping, and it deactivates the auto hold and electronic parking brake (epb) functions. in some cases, the car rolls after stopping because the system fails to …”
2022-07-20 · Vehicle Speed Control“during a highway trip that was bumper to bumper traffic at approximately 15mph, the car suddenly would not accelerate while operating on gasoline (not electric). the engine revs would increase to maximum without movement from the car (as if the car was in neutral). after checking the gear lever to make sure it was still in d, tried to accelerate ag…”
2022-02-23 · Electrical System · 3,400 mi“the contact leased a 2021 hyundai ioniq electric the contact stated that while the vehicle was parked, he attempted to open the driver’s side door using the key fob; however, the door would not open. the contact contacted hyundai roadside assistance who assisted him in jumpstarting and recharging the batteries. the contact was still able to drive t…”
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.