YearToAvoid

2021 Hyundai Ioniq Hybrid Problems, Recalls & Reliability

Verdict

Best

Complaint Index

0/100

#6 most-complained of 6 Ioniq Hybrid years

Based on NHTSA complaints per model-year, not a reliability rating. Methodology

The 2021 Hyundai Ioniq Hybrid ranks 6th out of 6 model years with a complaint index of 0, earning a "Best" verdict. NHTSA lists 13 complaints, 0 recalls, and no crashes, fires, injuries, or deaths for this year.

Complaints
13
Recalls
0
Crashes / fires
0 / 0
Injuries / deaths
0 / 0
NHTSA overall rating
Not rated
EPA combined MPG
—

Top 2021 Hyundai Ioniq Hybrid problems

NHTSA owner complaints by component group. Groups with 15+ complaints have their own page.

  1. Electrical System7 (54%)
  2. Collision Avoidance & Cameras4 (31%)
  3. Brakes3 (23%)
  4. Engine3 (23%)
  5. Other3 (23%)

What owners report

  • Auto-hold and electronic parking brake (EPB) warning lights illuminate randomly on the instrument panel, sometimes with no clear cause found by dealers.
  • Adaptive cruise control shuts off unexpectedly during highway driving, occurring on both rainy and sunny days.
  • When the auto-hold/EPB fault triggers, related driver-assist features like lane following assist and smart cruise control also stop working.
  • Electronic brake control module failures have been reported, requiring module replacement and, in at least one case, a long wait for a backordered part.
  • One owner reported an abnormal rattling sound and failure to accelerate at 73,020 miles, accompanied by illuminated check engine and oil warning lights, after a median mileage of 73,020 for engine-related complaints.
  • A dealer replaced a wiring harness for a recurring auto brake fault, and the issue only stopped after rear calipers were replaced.
2021 Hyundai Ioniq Hybrid complaints: complaints filed per month6Oct 2021May 2022Sep 2022May 2024May 2025
20 complaints filed with NHTSA from Oct 2021 to May 2025; peak Aug 2022 (6).

2021 Hyundai Ioniq Hybrid recalls

No safety recalls on record for this model year.

2021 compared with other Ioniq Hybrid years

Complaint Index by model year (0 = fewest issues, 100 = most)0255075100201720182019202020212022
Complaint Index: 0 = fewest issues, 100 = most, relative to other years of this model. Avoid Caution Good Best
YearVerdictIndexComplaintsRecallsMPG
2019Avoid100161—
2020Good40170—
2021Best0130—
2022Caution60240—

All Hyundai Ioniq Hybrid years: best and worst →

Frequently asked questions

Is the 2021 Hyundai Ioniq Hybrid reliable?
Based on NHTSA owner complaints and recalls, the 2021 model year has a complaint index of 0 and ranks best among the 6 model years with data, with 13 complaints and no recalls.
What are the most common problems with the 2021 Hyundai Ioniq Hybrid?
The top problem area is the electrical system, accounting for 7 of the 13 complaints (54%), largely tied to auto-hold and EPB warning lights and cruise control shutting off. Brakes and engine each account for 3 complaints (23%).
Does the 2021 Hyundai Ioniq Hybrid have any recalls?
NHTSA lists 0 recalls for the 2021 Ioniq Hybrid, compared to 3 recalls for the 2017 model and 2 for the 2018 model.
At what mileage do problems tend to appear on the 2021 Ioniq Hybrid?
Electrical system complaints show a median mileage of 10,000, brake complaints show a median of 19,000, and engine complaints show a median of 73,020 miles.
How does the 2021 Ioniq Hybrid compare to other model years?
The 2021 model has a complaint index of 0 and a 'Best' verdict, compared to 'Avoid' verdicts for 2019 (index 80) and 2022 (index 100).

Sources: NHTSA Office of Defects Investigation complaint and recall databases; U.S. EPA fuel economy data; NHTSA 5-Star Safety Ratings. Complaints are unverified owner reports.

Data updated Sep 24, 2026. Read the methodology and data sources. The Complaint Index is based on NHTSA owner complaints and recalls; it is not a reliability rating.