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Hyundai Ioniq Plug-In HybridModel year report

2021 Hyundai Ioniq Plug-In Hybrid Problems

Complaints
5filed with NHTSA
Median mileage
3,400miles, 1 complaints with mileage
Recalls
0campaigns on record
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA crash rating
—no overall rating published
EPA fuel economy
52 mpgcombined (gas only), 1.6L 4-cyl · plug-in hybrid FWD · 52 city / 51 hwy

Sources: NHTSA records for the 2021 Hyundai Ioniq Plug-In Hybrid (complaints, recalls, investigations), EPA fuel economy. Report an error

NHTSA recorded 5 consumer complaints for the 2021 Hyundai Ioniq Plug-In Hybrid. The part named most often is brakes, with 2 complaints (40% of the total), followed by electrical system (2) and forward collision avoidance (2). 1 of the complaints include a mileage, and 100% of those were filed for vehicles with under 50,000 miles; the median is 3,400 miles. NHTSA lists 0 recall campaigns and 9 technical service bulletins for this model year. Electrical system complaints overlap with 4 technical service bulletins filed under the same part.

This model year has fewer than 25 complaints on record, so the numbers below can change a lot with a few new reports.

Which parts are reported most

Complaints can name more than one part, so the counts add up to more than the total. Select a part to see its complaints, recalls and bulletins.

Example complaints

Brakes: “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 hold the vehicle. This issue compromises vehicle safety, especially on inclines or during stop-and-go traffic. It puts me, passengers, and other drivers at risk. The problem has occurred multiple times and is unpredictable. …”

NHTSA complaint #11673623, filed 2025-07

Electrical system: “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 the vehicle. The contact stated that a couple of days later, the vehicle failed to start after several attempts. …”

NHTSA complaint #11453602, filed 2022-02, 3,400 miles

Forward collision avoidance: “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 again and engine rev high without movement. Eventually car came to stop with brakes, and the car could move on electric power (in hybrid mode), pulled over and turned off the car to visually inspect. …”

NHTSA complaint #11474908, filed 2022-07

Mileage when problems were reported

100% of the 1 complaints with a mileage were filed for vehicles with under 50,000 miles; the middle half falls between 3,400 and 3,400 miles.

100%0–100%10–250%25–500%50–750%75–1000%100–1500%150+
Share of complaints by mileage when the problem was reported, in thousands of miles (1 complaints with mileage). Red bars: under 50,000 miles. Bucket widths differ. Median: 3,400 miles.

Complaints by year filed

Fewer than 15 complaints, too few for a reliable trend.

20222202522026
Complaints by year the complaint was filed with NHTSA. Red bars: the last 3 full calendar years used for the trend. The current year (2026) is partial.

Fuel economy and running cost

EPA ratings for each 2021 Hyundai Ioniq Plug-In Hybrid version. Annual fuel cost is the EPA's estimate at its current fuel prices for 15,000 miles a year (55% city driving); plug-in hybrid figures are for gasoline-only (hybrid mode) driving, so no annual cost is shown.

VersionEngineTransmissionCityHwyComb.Fuel / yr
Ioniq Plug-in Hybrid FWD1.6L 4-cyl · plug-in hybrid6-speed automatic525152 gas only—

Source: U.S. EPA and Department of Energy, fueleconomy.gov. Ratings are for comparing vehicles; real-world mileage varies with driving and conditions.

Recalls and investigations

NHTSA lists no recall campaigns for the 2021 Hyundai Ioniq Plug-In Hybrid in the data used here. A recall can apply to some vehicles of a model year and not others, so check a specific vehicle by VIN at nhtsa.gov/recalls.

Technical service bulletins

TSBs are manufacturer notes to dealers about known repair procedures. They are not recalls and do not by themselves mean a vehicle has a fault. 9 on record; the latest 9 are shown.

Other model years of the Hyundai Ioniq Plug-In Hybrid

YearComplaintsMedian miRecallsCrash ★MPGScore (50 = typical)Trend
202153,4000—52—Not enough data
202069730—52—Not enough data
20191121,0000—52—Not enough data

All Hyundai Ioniq Plug-In Hybrid model years

Frequently asked questions

How many NHTSA complaints does the 2021 Hyundai Ioniq Plug-In Hybrid have?

NHTSA recorded 5 consumer complaints for the 2021 Hyundai Ioniq Plug-In Hybrid as of Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

What part of the 2021 Hyundai Ioniq Plug-In Hybrid is reported most often?

Brakes is named most often, in 2 complaints (40% of the total), followed by electrical system with 2.

Has the 2021 Hyundai Ioniq Plug-In Hybrid been recalled?

NHTSA lists no recall campaigns for this model year in the data used here. To check a specific vehicle, enter its VIN at nhtsa.gov/recalls.

What gas mileage does the 2021 Hyundai Ioniq Plug-In Hybrid get?

The EPA rates the 2021 Hyundai Ioniq Plug-In Hybrid (Ioniq Plug-in Hybrid, 1.6L 4-cyl · plug-in hybrid) at 52 mpg combined, 52 city and 51 highway when running on gasoline in hybrid mode. Other engine and drive versions are rated differently.

At what mileage are problems with the 2021 Hyundai Ioniq Plug-In Hybrid reported?

Among the 1 complaints that include a mileage, the median is 3,400 miles and the middle half falls between 3,400 and 3,400 miles; 100% were filed for vehicles with under 50,000 miles.

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate. Fuel economy is from the EPA and DOE (fueleconomy.gov).

Complaint counts come from NHTSA’s public complaint database; we count each complaint once. The source records for this vehicle are on nhtsa.gov. Scores and trends are our own summaries of that data, described in the methodology. This page is not legal, safety or repair advice: for a specific vehicle, check its VIN at nhtsa.gov/recalls and ask a qualified mechanic. See an error? Tell us.