Hyundai Ioniq 5 Complaints

1,350 consumer complaints on file.

#11524999June 2, 2023
UNKNOWN OR OTHER
The problem is in "1-pedal" mode (which Hyundai calls "i-pedal"). This is an extremely convenient mode of driving in normal operation, yielding very smooth, passenger-friendly (acceleration and) deceleration by avoiding use of the brake pedals altogether. The problem is that the 2022 Ioniq 5 will *never* activate the brake lights ("stop lamps") when decelerating in i-pedal mode, as long as I apply any pressure at all on the accelerator pedal. This gives drivers behind me no notice that I am slowing down until I'm almost completely stopped. This seems to meet current DOT standards, but ONLY because I'm not using the brakes to decelerate. If I slow down at a similar rate using brakes, the brakes lights do turn on. I recently submitted a similar complaint to Hyundai: Consumer Affairs Case#: 21492175. For a more thorough explanation & demonstration, see this video from the Technology Connections channel on YouTube — he has exactly the same model as me (and I independently verified the behavior on my car with a driver following me): https://youtu.be/U0YW7x9U5TQ My complaint is to the DOT as much as to Hyundai: safety will be improved if the illumination of brake lights ("stop lamps") is required no matter what mechanism the driver is using to slow down, for all manufacturers and models (though this will likely only apply to Electric Vehicles or hybrids). I hope this can be made retroactive, which shouldn't be a great burden as I expect this could be implemented with a software upgrade. I believe the EU has such a regulation for cars sold in Europe.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11524961June 2, 2023
ELECTRICAL SYSTEM, ENGINE, FUEL/PROPULSION SYSTEM
Started vehicle and heard a loud pop with immediate amber warning to check electrical system with 12 volt battery and EV electrical system warning lights illuminated. While driving to dealerships, vehicle slowed abruptly at Highway speed and warning message said to stop vehicle immediately. Towed to dealership with probable bad integrated charging control unit and high voltage fuse blown. Seems to be an issue with many ioniq 5s. Recall this vehicle!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11524915June 1, 2023
ELECTRICAL SYSTEM, POWER TRAIN, FUEL/PROPULSION SYSTEM
The 12-volt battery that controls everything in the car stopped being recharged by the 800volt battery, eventually causing the car to suddenly lose power and slow to 22 mph on the freeway. I was able to pull over 3 lanes and exit what was fortunately an uncrowded freeway. The car would not exceed 22 mph and soon stopped altogether and could not be moved. The main 800volt battery was at 56% charge, as the 12-volt battery went to 0%. The car was towed to the dealer. After inspection the dealer has confirmed that the ICCU system has failed and must be replaced, with a long back order and still no delivery date after 5 weeks. There were warning messages that appeared before the vehicle lost power, saying to check the battery electrical system. There should have been a warning that said “stop driving immediately as the electrical system is failing, and the car may stop even though the main battery is still well charged.”
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11524572May 31, 2023
ELECTRICAL SYSTEM
12v battery died within 6 days and needed to be jumped. Another 4 days and the 12v will not hold a charge at all. This is a new 2023 Ioniq 5 Limited AWD. Odo on the lot was 13 miles. Odo at 10 days was around 280. Waiting to hear from Hyundai, but dealer confirmed 12v is bad. Currently unknown if ICCU is also faulty.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11524271May 29, 2023
SERVICE BRAKES, VEHICLE SPEED CONTROL
brake lights do not come on when the car is in regenerative braking or driving mode and the driver is touching the gas pedal. Drivers following the car are not aware the car is actually braking not coasting. This is causing a rearending hazard. Mfr needs to correct issues so brake lights come on when car is in regenerative braking mode and the car is deaccellerating regardless of gas pedal activity
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11524224May 28, 2023
ELECTRICAL SYSTEM
Vehicle will not charge at advertised speeds. Vehicle notifies me via phone app notification that “vehicle is not charging. Please try again. Ensure the vehicle infusions is off and gear shift is in park.” The car only charges if manually adjusted in settings to charge at minimum charging speed. The car used to charge at adversities speed and no longer does ever.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11524188May 28, 2023
SERVICE BRAKES, ELECTRICAL SYSTEM
The Ioniq 5 has a braking system that does not engage the brake lights on deceleration when in certain regenerative braking settings. This is dangerous as the car will quickly decelerate and not warn drivers behind you potentially causing a crash because they are unaware the Ioniq is stopping quickly. Please have Hyundai address the issue for recall.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11524058May 26, 2023
ELECTRICAL SYSTEM, UNKNOWN OR OTHER, SERVICE BRAKES
The vehicle does not illuminate the brake lights when slowing down in ipedal and level 3 regen modes without actually pressing down the brake pedal.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11524040May 26, 2023
EXTERIOR LIGHTING
Rear brake lights do not properly come on in certain driving modes (i-pedal). The lights will only turn on if you completely release the accelerator pedal. The problem is, that you can significantly reduce your speed down to a stop without ever fully releasing the accelerator all the way.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11524021May 26, 2023
SERVICE BRAKES, EXTERIOR LIGHTING, VEHICLE SPEED CONTROL
The Ioniq 5 when using level 2 regen, level 3 regen, and i-pedal (one pedal driving), does not turn on the break light when decelerating, even if coming to a full stop unless the driver removes their foot completely from the pedal or hits the break pedal. These driving modes allow the driver to perform regenerative breaking almost to a complete stop without turning on the break lights and warning other drivers behind you. With i-pedal specifically, the driver can 100% perform all stop and go traffic maneuvers without using the break and never have the break lights activate. This appears to be the default behavior of all Ioniq 5 vehicles and is controlled via software. The vehicle does not appear to measure rate of deceleration so even if the driver were to decelerate rapidly, the brakes would not activate. This has been extensively demonstrated on youtube and the best video example of this problem can be found here: https://www.youtube.com/watch?v=U0YW7x9U5TQ
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11523991May 26, 2023
EXTERIOR LIGHTING
Brake lights during I-Pedal or 1 Pedal driving modes. When under "I-Pedal" or 1 pedal driving mode brake lights do not engage unless foot is fully off the accelerator pedal. This is concerning as the vehicle can brake rather agressively with no indicition to the drivers behind you. The brake lights should illuminate when a sufficient amount of braking is occuring, not just when the accelerator is fully disengaged.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11523974May 26, 2023
EXTERIOR LIGHTING
This vehicle can use regenerative braking to slow fully to a stop. However, using regen to slow sharply does not activate the brake lights unless the accelerator pedal is fully released. This means that you can slow at a significant rate without alerting vehicles behind you that you are slowing. Vehicle should activate brake lights when slowing beyond a specific rate. This has been the case since vehicle delivery (3/28/22) and continues today. Occurs at all speeds.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11523948May 26, 2023
SERVICE BRAKES
The brakes lights do not illuminate when slowing down using regen braking. This has cause cars to stop very close to rear-ending me. This video explains this issue in great detail https://www.youtube.com/watch?v=U0YW7x9U5TQ
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11523937May 26, 2023
SERVICE BRAKES
The IONIQ 5, like other electric vehicles, uses regenerative breaking. Regenerative breaking can be set at level 1, 2, 3, or i-pedal mode. This determines the strength in which the car will engage regenerative breaking automatically when the position of the accelerator petal is raised above the current speed. i-pedal mode is full one-pedal driving, allowing the driver to slow to a stop without use of the break pedal at all. At level 2, 3, or i-pedal, the car is capable of decelerating at a significant rate even when the driver is still pressing down on the pedal. For example, if you consider it as a percentage and take "foot off the pedal" as 0%, and "pedal pressed as far as it can go" as 100%, a driver could be traveling at 70 mph on the highway, with the pedal pressed at around 60%. The driver could then lift the pedal to only 30%, and the regenerative breaking would then slow the car to, say, 30 mph. This deceleration can be very strong when set to a high regen level. However, the break lights do not illuminate unless the driver takes their foot completely off of the accelerator. In i-pedal mode especially, it is possible to decelerate from highway speed to a near stop in only a matter of seconds, without the break lights ever activating. Other EV manufacturers illuminate the break lights based on the cars measured deceleration when using regenerative breaking, and do not have this issue. If the driver has driven other EVs in the past and prefers the one pedal driving mode, it is likely they will not even know that their break lights are not illuminating during heavy deceleration, creating a significant danger of being rear ended when driving in heavy traffic.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11523936May 26, 2023
EXTERIOR LIGHTING
When my car is configured to one pedal driving mode (iPedal), the brake lights only illuminate when the accelerator pedal is fully released. This means the car may decelerate rapidly (up to 0.25G or 2.5m/s^2 according to a report) under regenerative braking, while the brake lights remain off. I believe this is a safety hazard that can increase the chances of rear-end accidents.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11523916May 25, 2023
SERVICE BRAKES
Brake lights do not lit while decelerating using regen braking system without letting foot off of accelerator. There is no indication for vehicle behind mine to decelerate which can result in collision
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11523912May 25, 2023
EXTERIOR LIGHTING, SERVICE BRAKES
Brake lights do not illuminate in 1 pedal driving unless accelerator pedal is fully released. I often bring the car to a complete stop with the brake lights never illuminating until I'm nearly stopped, around 5 mph or less. I often see people ride up behind me quickly and have to slam on their brakes as they don't realize I'm slowing down so rapidly. This can be repeated at any time. I have not spoken to a dealer or the manufacturer about this, nor has it been inspected by any party. There are no warning lights, this seems to be normal behavior, many others have reported on this issue as well. This has been happening since I got the car.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11523904May 25, 2023
SERVICE BRAKES
Brake lights do NOT come on when decelerating in I-PEDAL mode and Level 3 regen brake modes, perhaps more. The car should instead generously apply brake lights by default anytime deceleration occurs via regen braking.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11523888May 25, 2023
SERVICE BRAKES
When using most of the regenerative braking levels, including the one-pedal driving mode named “i-Pedal,” the brake lights will not illuminate until the drivers foot is fully off the gas pedal, or manually applying the brakes. This can create a dangerous, life threatening scenario leaving surrounding drivers unaware the vehicle is slowing. This has not been reproduced by the automaker not inspected by them, police, insurance, etc but has been verified on video. No warning lamps appeared.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11523870May 25, 2023
SERVICE BRAKES
The regenerative braking will not turn on brake lights unless the accelerator is fully unpressed. In the more aggressive modes (L3 and I-Pedal), the stopping power is very strong. Without brake lights, it catches other motorists off guard and they nearly hit me. For reference, I-Pedal mode is able to bring the car to a full stop on its own. This is dangerous. The brake lights need to come on depending on the rate of deceleration, not the accelerator pedal state. This can happen at any speed, but becomes more dangerous at highway speeds.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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