2019 Hyundai Ioniq Plug-IN Hybrid: what breaks, and at what mileage
What breaks on the 2019 Hyundai Ioniq Plug-IN Hybrid
On the 2019 Hyundai Ioniq Plug-IN Hybrid, the failure owners report most often is other powertrain problem, with 4 reports on file. Across every failure mode on this year, half the dated reports were filed before 20,000 miles. Overall it scores 82 out of 100, severe risk for a 2019.
Severe risk for a 2019 — 23rd riskiest of the 245 2019 vehicles we can rate. 19 owner reports; fleet size borrowed from other years of the same model.
The failures owners actually file about
Owners have reported 10 named failure modes on the 2019 Hyundai Ioniq Plug-IN Hybrid, and the three most-reported carry 47% of everything filed.
Other powertrain problem leads with 4 reports and about 1.5 per 1,000 vehicles.
Cruise control failure follows with 3 reports, median 20,000 miles.
Other engine problem follows with 2 reports.
By system, the reports fall mostly into transmission (4), adas (4) and engine (3).
When these failures get reported
Too few of the reports on this year carry an odometer reading to describe the timing: 3 of them do. The mileages quoted elsewhere on this page come from the modes that have enough of them.
Tick median reported mileage Solid middle half of reports Faint 10th to 90th percentile Colour how bad the failure is when it happens
How reports accumulate
Every report with an odometer reading, cumulative, from 0 to 200,000 miles. A curve that climbs early is a car with early problems, whatever its total.
- Line share of reports filed by that mileage
Severity, and what it costs
Across the named modes, 7 mention a crash and 4 an injury. Those are the words owners used in their own complaints, and NHTSA does not verify them, but they are the closest thing in this data to a measure of what a failure actually did.
The average severity weight across every report on this year is 7.16, where a stalled engine or a failed airbag weighs many times more than a rattling trim panel, and a figure this high means the reports are dominated by failures with safety consequences rather than annoyances. The weighting is set out in full on the methodology page.
What the top failures cost to put right, as editorial estimates for an independent US shop rather than figures from NHTSA: other powertrain problem at $400–$4,500, cruise control failure at $200–$1,400, other engine problem at $300–$4,000 and other fuel system problem at $300–$2,200. Dealer labour, a seized bolt or a part that is no longer made can push any of these past the top of its range.
37% of the reports on this year sit in the engine, transmission, drivetrain or cooling systems — the four where a repair bill is usually four figures.
Every reported failure mode
| Failure mode | System | Reports | With reading | 25th | Median | 75th | Per 1,000 | Typical repair | Severity |
|---|---|---|---|---|---|---|---|---|---|
| Other powertrain problem | transmission | 4 | 0 | — | — | — | 1.5 | $400–$4,500 | High |
| Cruise control failure | adas | 3 | 3 | — | 21k | — | 1.1 | $200–$1,400 | High |
| Other engine problem | engine | 2 | 0 | — | — | — | 0.8 | $300–$4,000 | High |
| Other fuel system problem | fuel | 2 | 0 | — | — | — | 0.8 | $300–$2,200 | High |
| No-start or intermittent start failure | engine | 1 | 0 | — | — | — | 0.4 | $200–$1,800 | Moderate |
| Wiring harness or short circuit | electrical | 1 | 0 | — | — | — | 0.4 | $400–$3,500 | High |
| Airbag failed to deploy in a crash | airbag | 1 | 0 | — | — | — | 0.4 | $1,000–$5,000 | Critical |
| Seat belt or retractor failure | airbag | 1 | 0 | — | — | — | 0.4 | $200–$900 | High |
| Other electrical problem | electrical | 1 | 0 | — | — | — | 0.4 | $250–$2,000 | Moderate |
| Other speed control problem | adas | 1 | 0 | — | — | — | 0.4 | $250–$2,000 | Critical |
| Unclassified problem | other | 2 | 0 | — | — | — | 0.8 | — | Moderate |
This year had no usable recall paperwork, so the fleet-size estimate is the median of other years of the same model. Repair costs are typical independent-shop ranges for the failure, not figures from these reports.
How often, against how many were built
Scaled by an estimate of how many of these cars exist, the 2019 Hyundai Ioniq Plug-IN Hybrid draws about 7.2 per 1,000 vehicles, which puts it in the 87th percentile of complaint rates among 2019 vehicles we can rate.
That denominator is the weakest number on the page and it is fair to say so plainly. This year had no usable recall paperwork, so the fleet-size estimate is the median of other years of the same model.
The working figure is 2,643 vehicles. If the true number is twice that, every rate on this page is half what it says; the ranking against other 2019 vehicles, which is what the risk score uses, is far more robust than the rate itself.
How it ranks in the 2019 field
The score at the top of the page, placed among its peers. The zones are the same thresholds the scorer applies, read out of the scorer itself, so the picture and the band word cannot disagree.
Scores are ranked within the model year, never across years, because an older car has had longer to accumulate reports.
- Left fewer and less serious reports
- Right more, or worse
- Marker this vehicle
Better and worse years of the same car
Severe risk for a 2019 — 23rd riskiest of the 245 2019 vehicles we can rate. The comparison is always within the same model year, so an older car is never penalised for having had longer to break.
Scores compare each year against other cars of the same model year, so a low number on an older car is a real result and not an artefact of age.
Shorter is better. Years with too few reports to score are shown without a bar rather than as a zero, because no data is not good news.
What this page cannot tell you
19 owner reports; fleet size borrowed from other years of the same model. Every count on this page is therefore a floor: it is the number of owners who went to the trouble of filing with a federal agency, which is a small and self-selected fraction of the owners who had the fault.
Of those 19 reports, 3 carried an odometer reading, so the mileages here describe 16% of the sample rather than all of it. Owners also round: readings pile up on multiples of ten thousand, which is why this site publishes "about 90,000 miles" and not "91,438".
Named failure modes come from matching phrases in the complaint text, so a badly worded complaint can land in the wrong bucket. The effect washes out across hundreds of reports and does not wash out across five.
And nothing here predicts what one car will do. These are other people's complaints, filed years apart, on cars maintained by strangers. Read the page as a map of where this model year has previously gone wrong, then have the specific car in front of you inspected.
Questions this page answers
What are the most common problems with the 2019 Hyundai Ioniq Plug-IN Hybrid?
The most-reported failures are other powertrain problem (4 reports), cruise control failure (3 reports, median 20,000 miles) and other engine problem (2 reports). Counts come from owner complaints filed with NHTSA, which are voluntary, so they show what owners bothered to report rather than every fault that occurred.
Is the 2019 Hyundai Ioniq Plug-IN Hybrid reliable?
It scores 82 out of 100 on our risk index, which is severe — 23rd riskiest of the 245 2019 vehicles we can rate. The score is a comparison against other 2019 vehicles, not a prediction about any individual car, and it is built from complaint rates, severity and how early failures appear.
Where this comes from. Every figure above is computed from NHTSA owner complaints and recall records for this exact make, model and year. Complaints are voluntary and self-selected, so treat counts as a floor. The methodology page writes out each formula, and the same numbers are available as JSON.
What breaks at my mileage Compare with another car
Source Owner complaints and recall records published by the US National Highway Traffic Safety Administration, model years 1996–2027 Figures rebuilt Published by AtWhatMileage How every figure is computed