2018 Hyundai IONIQ ELECTRIC problems and owner complaints
Explore the records behind recurring owner reports.
Key facts
0 owner complaints analyzed
1 distinct recall campaigns
Not available median reported failure mileage
Scope: 2018 model year. Data updated: . 0 complaints include usable failure mileage. View data status.
This selection has limited data. It remains available for lookup but is excluded from search indexing.
Most common problems
No owner complaints are recorded for this selection. A complaint can name multiple components.
Component breakdown
Number of unique complaints naming each component. Top eight shown.
No usable records for this chart.
| Category | Count |
|---|
No records.
Reported problems by failure mileage
Complaint counts in mileage bands. These are not failure rates per vehicle or mile.
| Category | Count |
|---|---|
| Under 25,000 | 0 |
| 25,000 to 49,999 | 0 |
| 50,000 to 74,999 | 0 |
| 75,000 to 99,999 | 0 |
| 100,000 to 149,999 | 0 |
| 150,000 and above | 0 |
Under 25,000: 0; 25,000 to 49,999: 0; 50,000 to 74,999: 0; 75,000 to 99,999: 0; 100,000 to 149,999: 0; 150,000 and above: 0
No usable failure mileage is recorded. 0 complaints have missing, zero or invalid mileage.
Complaints over time
Year the complaint was filed, not the vehicle model year or incident year. The snapshot year is partial.
No usable records for this chart.
| Category | Count |
|---|
No records.
Pattern summary
There is not enough complaint evidence to summarize patterns.
Calculated from recorded counts. An AI narrative has not been published for this selection.
Complaint evidence
Examples provide context, not a representative sample or a verified diagnosis.
Vehicle analysis explorer
Inspect model-year patterns, reported mileage, monthly activity and the evidence behind each signal.
Data completeness
0 unique complaints in this selection. Analysis snapshot: 2026-10-01.
Missing, zero and invalid mileage is excluded. Dates after the snapshot are excluded. Examples are limited selections, not a representative sample.
Problems by model year
Model-wide comparison of the eight most reported components across the model. Cells show counts and shares within each model year. Open a cell for source examples.
| Component | 2017 | 2018 | 2019 | 2020 | 2021 |
|---|---|---|---|---|---|
| Electrical System | 777.8%ODI 11156553 · 18,000 miCAR SKIDS AND LOSES CONTROL. TRACTION CONTROL LIGHT ILLUMINATES DURING LOSS OF CONTROL. HARD BRAKING CREATES THE BRAKES TO LOCK UP. VEHICLE IS UNABLE TO EXECUTE CLIMBING INCLINED DRIVEWAYS. SEVERE SAFETY ISSUE AS ITS ESPECIALLY CONTROL LOSS DURING RAIN. | 0UnavailableNo examples available for this selection. | 466.7%ODI 11360258 · 5,300 miI HAVE HAD 4 INCIDENTS SO FAR OVER THE LAST MONTH, ALL LASTING UNDER 5 SECONDS. IN EACH CASE, THE REGENERATIVE BRAKING SWITCHES TO A DIFFERENT LEVEL WITHOUT ANY INPUT FROM THE USER. THIS PRESENTS AS WHAT FEELS LIKE A LEVEL 3 (STRONG) BRAKING WHEN NONE WAS ON AND NO FOOT IS NEAR THE BRAKE, OR IF THE REGEN BRAKING WAS TURNED ON (IN ONE CASE TO LEVEL 1), IT SHUTS OFF MOMENTARILY. DURING THESE INCIDENTS, THE BEHAVIOR IS ALSO IRREGULARLY CHANGING BETWEEN FOR EXAMPLE HARD BREAKING (LEVEL 3) FOR A SECOND AND THEN FLUTTERING IRREGULARLY BETWEEN HARD AN… | 114.3%ODI 11421743The traction battery on my Ioniq 2020 went bad after 3 months. The diagnostic panel warned me of an electric issue and the range dropped drastically. The dealer changed the battery no questions asked. My vin wasn't part of the recall. I wonder if the recall should have included a broader range of vehicles. | 150.0%ODI 11750854VEHICLE SAFETY HAZARD: ACTIVE HIGH-VOLTAGE ISOLATION FAULT (DTC P0AA6) WITH DECEPTIVE DEALER/MANUFACTURER BYPASS & CONCEALMENT. On April 15, 2026, the dealer scanned my 2021 Ioniq EV and uncovered DTC P0AA6 (Hybrid/EV Battery Voltage System Isolation Fault), which denotes a catastrophic high-voltage leak into the chassis. This is a severe safety hazard posing immediate risks of fatal electrocution to occupants, EV battery thermal runaway (fire), or sudden total loss of propulsion at highway speeds. Instead of grounding this dangerous vehicle… |
| Service Brakes | 111.1%ODI 11114947 · 600 miTL* THE CONTACT OWNS A 2017 HYUNDAI IONIQ ELECTRIC. THE CONTACT TOOK THE VEHICLE TO HYUNDAI INLAND EMPIRE (25072 REDLANDS BLVD, LOMA LINDA, CA 92354) FOR A KEY REPLACEMENT. WHEN THE CONTACT PLACED THE GEAR IN REVERSE AND ATTEMPTED TO REMOVE HIS FOOT FROM THE BRAKE PEDAL, THE VEHICLE ACCELERATED UP TO 20 MPH WHILE IN REVERSE. AS A RESULT THE VEHICLE CRASHED INTO ANOTHER VEHICLE. THE AIR BAGS DID NOT DEPLOY. A POLICE REPORT WAS NOT FILED AND THERE WERE NO INJURIES. THE SAME DEALER WAS INFORMED ABOUT THE FAILURE, BUT THE VEHICLE WAS NOT DIAGNOSED … | 0UnavailableNo examples available for this selection. | 350.0%ODI 11360258 · 5,300 miI HAVE HAD 4 INCIDENTS SO FAR OVER THE LAST MONTH, ALL LASTING UNDER 5 SECONDS. IN EACH CASE, THE REGENERATIVE BRAKING SWITCHES TO A DIFFERENT LEVEL WITHOUT ANY INPUT FROM THE USER. THIS PRESENTS AS WHAT FEELS LIKE A LEVEL 3 (STRONG) BRAKING WHEN NONE WAS ON AND NO FOOT IS NEAR THE BRAKE, OR IF THE REGEN BRAKING WAS TURNED ON (IN ONE CASE TO LEVEL 1), IT SHUTS OFF MOMENTARILY. DURING THESE INCIDENTS, THE BEHAVIOR IS ALSO IRREGULARLY CHANGING BETWEEN FOR EXAMPLE HARD BREAKING (LEVEL 3) FOR A SECOND AND THEN FLUTTERING IRREGULARLY BETWEEN HARD AN… | 342.9%ODI 11432408This issue is easily repeatable, when braking if you hit a bump (pot hole, etc.) the braking power is greatly reduced & the brake pedal becomes almost impossible to push down to stop the car, making it very hard to stop even when not coming to an abrupt stop. | 00.0%No examples available for this selection. |
| Vehicle Speed Control | 222.2%ODI 11114947 · 600 miTL* THE CONTACT OWNS A 2017 HYUNDAI IONIQ ELECTRIC. THE CONTACT TOOK THE VEHICLE TO HYUNDAI INLAND EMPIRE (25072 REDLANDS BLVD, LOMA LINDA, CA 92354) FOR A KEY REPLACEMENT. WHEN THE CONTACT PLACED THE GEAR IN REVERSE AND ATTEMPTED TO REMOVE HIS FOOT FROM THE BRAKE PEDAL, THE VEHICLE ACCELERATED UP TO 20 MPH WHILE IN REVERSE. AS A RESULT THE VEHICLE CRASHED INTO ANOTHER VEHICLE. THE AIR BAGS DID NOT DEPLOY. A POLICE REPORT WAS NOT FILED AND THERE WERE NO INJURIES. THE SAME DEALER WAS INFORMED ABOUT THE FAILURE, BUT THE VEHICLE WAS NOT DIAGNOSED … | 0UnavailableNo examples available for this selection. | 233.3%ODI 11377395 · 6,800 miTHIS IS A FOLLOW UP TO COMPLAINT NUMBER 1# 1360258 SUBMITTED IN SEPT. IN PARTICULAR, I HAVE HAD MULTIPLE DEALERS REPLACE A WATER PUMP AND RELATED ASSEMBLIES FOR A TOTAL OF 3 REPLACEMENTS SINCE AUG. THIS WAS THEIR EFFORT TO DEAL WITH THE ELECTRICAL SYSTEM ISSUES THAT HAVE RESULTED CONTINUED INCIDENTS OF ERRATIC AND UNCONTROLLED APPLICATION OF THE REGENERATIVE BREAKING (NOT BY DRIVER), SHUTTING OFF OF ANY ABILITY TO ACCELERATE THE CAR WHILE DRIVING, AND COMPLETE SHUTOFFS OF THE CAR WHILE DRIVING ON FREEWAYS, I.E. ALL LIGHTS OFF, NO RESPONSE FROM … | 114.3%ODI 11634881When approaching a turn, I let off the accelerator but the car didn’t stop accelerating. Instead, it gently kept accelerating. I applied the brakes and the car started slowing down but not at the same rate I was applying brake pressure. Therefore I floored the brakes to try coming to a complete stop. Sadly, the cars ABS system did not engage, half of the car hopped over the curb at about 20 mph. I was able to steer the car back onto the road where it finally came to a stop but acted like it wanted to keep going until full blackout power loss ha… | 00.0%No examples available for this selection. |
| Fuel/Propulsion System | 00.0%No examples available for this selection. | 0UnavailableNo examples available for this selection. | 00.0%No examples available for this selection. | 114.3%ODI 11634881When approaching a turn, I let off the accelerator but the car didn’t stop accelerating. Instead, it gently kept accelerating. I applied the brakes and the car started slowing down but not at the same rate I was applying brake pressure. Therefore I floored the brakes to try coming to a complete stop. Sadly, the cars ABS system did not engage, half of the car hopped over the curb at about 20 mph. I was able to steer the car back onto the road where it finally came to a stop but acted like it wanted to keep going until full blackout power loss ha… | 150.0%ODI 11750854VEHICLE SAFETY HAZARD: ACTIVE HIGH-VOLTAGE ISOLATION FAULT (DTC P0AA6) WITH DECEPTIVE DEALER/MANUFACTURER BYPASS & CONCEALMENT. On April 15, 2026, the dealer scanned my 2021 Ioniq EV and uncovered DTC P0AA6 (Hybrid/EV Battery Voltage System Isolation Fault), which denotes a catastrophic high-voltage leak into the chassis. This is a severe safety hazard posing immediate risks of fatal electrocution to occupants, EV battery thermal runaway (fire), or sudden total loss of propulsion at highway speeds. Instead of grounding this dangerous vehicle… |
| Power Train | 222.2%ODI 11114947 · 600 miTL* THE CONTACT OWNS A 2017 HYUNDAI IONIQ ELECTRIC. THE CONTACT TOOK THE VEHICLE TO HYUNDAI INLAND EMPIRE (25072 REDLANDS BLVD, LOMA LINDA, CA 92354) FOR A KEY REPLACEMENT. WHEN THE CONTACT PLACED THE GEAR IN REVERSE AND ATTEMPTED TO REMOVE HIS FOOT FROM THE BRAKE PEDAL, THE VEHICLE ACCELERATED UP TO 20 MPH WHILE IN REVERSE. AS A RESULT THE VEHICLE CRASHED INTO ANOTHER VEHICLE. THE AIR BAGS DID NOT DEPLOY. A POLICE REPORT WAS NOT FILED AND THERE WERE NO INJURIES. THE SAME DEALER WAS INFORMED ABOUT THE FAILURE, BUT THE VEHICLE WAS NOT DIAGNOSED … | 0UnavailableNo examples available for this selection. | 00.0%No examples available for this selection. | 00.0%No examples available for this selection. | 00.0%No examples available for this selection. |
| Steering | 222.2%ODI 11156553 · 18,000 miCAR SKIDS AND LOSES CONTROL. TRACTION CONTROL LIGHT ILLUMINATES DURING LOSS OF CONTROL. HARD BRAKING CREATES THE BRAKES TO LOCK UP. VEHICLE IS UNABLE TO EXECUTE CLIMBING INCLINED DRIVEWAYS. SEVERE SAFETY ISSUE AS ITS ESPECIALLY CONTROL LOSS DURING RAIN. | 0UnavailableNo examples available for this selection. | 00.0%No examples available for this selection. | 00.0%No examples available for this selection. | 00.0%No examples available for this selection. |
| Electrical System:12v/24v/48v Battery | 00.0%No examples available for this selection. | 0UnavailableNo examples available for this selection. | 00.0%No examples available for this selection. | 00.0%No examples available for this selection. | 150.0%ODI 11527960 · 22,000 miThe contact owns a 2021 Hyundai Ioniq EV. The contact stated that on several occasions the vehicle would not start or could not be restarted after being turned off. The vehicle was towed to the local dealer who was unable to determine the exact cause of the failure but indicated that the failure was related to the 12V battery system. The vehicle was not yet repaired. The manufacturer and local dealer were notified of the failure. The failure mileage was 22,000. |
| Engine | 00.0%No examples available for this selection. | 0UnavailableNo examples available for this selection. | 00.0%No examples available for this selection. | 114.3%ODI 11525179Refill Coolant warning light intermittently signals EV battery coolant problem. Hyundai dealer in Fort Wayne, IN, topped off coolant. Andrew service representative was informed of two YouTube videos explaining recall due to defective coolant ASC1 that crystalizes and/or becomes sludgy. Video reported dealer changed old coolant with an upgraded coolant ASC2 number in a Hyundai Ioniq Limited 2020 Electric Vehicle 38 kw like my vehicle. Fort Wayne, Glenbrook Hyundai dealer has very little experience or training with EV vehicles, since they off… | 00.0%No examples available for this selection. |
Darker cells indicate a larger share of submitted complaints. Components overlap. This measures complaint composition, not failure probability.
Failure mileage by component
Median and middle 50% of usable owner-reported mileages. Ranges require at least five records.
| Component | Mileage range (25th–75th percentile) | Median | Usable records | Examples |
|---|---|---|---|---|
| No usable records for this analysis. | ||||
Complaint and recall timeline
Explore monthly filing activity alongside recall announcements. Up to ten years of monthly history is available.
Solid line: filed complaints. Dashed amber lines: recall announcement dates for this vehicle selection; markers include all recall components. The latest month is partial. Temporal proximity does not establish causation.
Monthly counts, recall campaigns and complaint examples
| Month | Complaints | Campaigns announced | Examples |
|---|---|---|---|
| 2024-11 | 0 | None | No examples available for this selection. |
| 2024-12 | 0 | None | No examples available for this selection. |
| 2025-01 | 0 | None | No examples available for this selection. |
| 2025-02 | 0 | None | No examples available for this selection. |
| 2025-03 | 0 | None | No examples available for this selection. |
| 2025-04 | 0 | None | No examples available for this selection. |
| 2025-05 | 0 | None | No examples available for this selection. |
| 2025-06 | 0 | None | No examples available for this selection. |
| 2025-07 | 0 | None | No examples available for this selection. |
| 2025-08 | 0 | None | No examples available for this selection. |
| 2025-09 | 0 | None | No examples available for this selection. |
| 2025-10 | 0 | None | No examples available for this selection. |
| 2025-11 | 0 | None | No examples available for this selection. |
| 2025-12 | 0 | None | No examples available for this selection. |
| 2026-01 | 0 | None | No examples available for this selection. |
| 2026-02 | 0 | None | No examples available for this selection. |
| 2026-03 | 0 | None | No examples available for this selection. |
| 2026-04 | 0 | None | No examples available for this selection. |
| 2026-05 | 0 | None | No examples available for this selection. |
| 2026-06 | 0 | None | No examples available for this selection. |
| 2026-07 | 0 | None | No examples available for this selection. |
| 2026-08 | 0 | None | No examples available for this selection. |
| 2026-09 | 0 | None | No examples available for this selection. |
| 2026-10 (partial) | 0 | None | No examples available for this selection. |
Emerging complaint spikes
Complete months in the latest six months with at least 10 complaints, at least twice the preceding 12-month average, and at least three square-root deviations above that average.
This is a descriptive screening rule, not a statistical defect finding. Publicity and reporting changes can increase submissions.
No complete months meet the spike thresholds for this selection.
Equal-age model-year comparison
Model-wide cumulative reports during the first three or five calendar years, starting with the model year (age 0). Only fully elapsed windows are compared.
2020: 4 complaints · 2021: 1 complaints
| Model year | Through age 0 | Through age 1 | Through age 2 |
|---|---|---|---|
| 2020 | 1 | 4 | 4 |
| 2021 | 0 | 0 | 1 |
Date coverage across each selected cohort
| Year | Incident dates used | Filing date fallbacks | Excluded dates |
|---|---|---|---|
| 2020 | 7 | 0 | 0 |
| 2021 | 2 | 0 | 0 |
Incident date is preferred when valid and no later than filing; otherwise filing date is used. Model year approximates age. Equal observation time does not adjust for sales, distance driven or reporting delays. One complaint linked to multiple model years can appear in each cohort.
Components reported together
Each cell counts unique complaints naming both components. Open a nonzero cell for examples.
| Component |
|---|
| No usable records for this analysis. |
Co-reporting does not establish that one component caused another concern.
Recurring narrative patterns
Specific keyword mentions beyond broad component labels. Matching includes negations and comparisons and does not confirm a diagnosis.
0 patterns with matching reports.
No narratives match the published patterns.