| Issue ID | 1691852 |
| Internal NHTSA # | 11360258 |
| Manufacurer | Hyundai Motor America |
| Brand | HYUNDAI |
| Model | IONIQ ELECTRIC |
| Model Year | 2019 |
| File date | 15/08/20 |
| Component | SERVICE BRAKES |
| Product type code | VEHICLE |
| Description of the problem | I 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 and low levels. In one incident, the car completely shut off (and stayed in neutral) after an incident happened while accelerating from a stop. The car then glided to the side of the road where i was able to restart the car as normal. In each case, the incident occurs while in motion, not touching the brake pedal but may be currently set on different levels of regen braking (it's happened both in level 0 (none) and 1 (low). The behaviour is not however trigger by manally changing the regen level but seems to just spontaneously happen while smooth driving. Most cases occurred on city streets but one occurred on a smooth highway at about 60mph. None of the incidents have created an accident as i was not very close to any car in any case. I do have two invoices from separate car dealers looking at the problem. In the first case, they could not find any error codes but they found the water pump was leaking and replaced that (per a tsb). Following another incident i took it to a second dealer who also did not see an error code nor could find a problem. This, even after the "ev" warning light came on for a full drive two days previous. |
| Vehicle Mileage at Failure | 5300 |
| Number of Occurences | |
| Source of the issue | NHTSA WEB SITE |
| City and State | ODENTON, MD |
| VIN pattern | KMHC75LH5KUXXXXXX |
| Was vehicle invloved in a crash? | N |
| Was vehicle involved in a fire? | N |
| Was incedent reported to police? | N |
| Was medical attention required? | N |
| Was part original equipment? | |
| No. of injured persons | |
| No. of fatalities | |
| Date of purchase | 07/08/26 |
| Was original owner? | N |
| Anti-lock brakes | N |
| Cruise control | N |
| Number of cylinders | |
| Drive train type | |
| Transmission type | |
| Vehicle speed | 60 |
| DoT tire identifier | |
| Tire size | |
| Location of tire code | |
| Type of tire failure code | |
| Was defective tire repaired? | |
| Date of manufacture | |
| Type of child seat code | |
| Type of restraint | |
| Dealer's name | |
| Dealer's telephone number | |
| Dealer's city | |
| Dealer's state code | |
| Dealer's ZIP code |