2025 Hyundai Ioniq 5 Problems & Lemon Law Guide for Owners

A comprehensive review of common issues reported by 2025 Hyundai Ioniq 5 owners, including electrical failures, safety system malfunctions, and manufacturer responses based on NHTSA data, consumer feedback, and our data.

Updated on October 29th, 2025 Author: Sergei Lemberg

The 2025 Hyundai IONIQ 5, which debuted as a 2022 model, is an electric crossover competing in the growing EV market. Our aim is to provide clear information on the most common issues reported with this vehicle using data from the NHTSA and verified owner feedback. As a lemon law firm, we also explain how these problems may qualify for protection under state lemon law.

Click on another model years to view more problems: 2021   2022   2023

Most Common Problems

Data from NHTSA complaints, Reddit owner discussions, and industry reports reveal several recurring issues.

• Integrated Charging Control Unit (ICCU) Failures: This component frequently fails, causing sudden power loss and extended repair delays.
• Driver Forward Attention Warning (FAW) System Malfunctions: Numerous false alarms lead to distraction and unintended disabling of safety features.
• Powertrain Hesitation and Pulsation: The vehicle exhibits surging or juddering during acceleration or steady driving between 57 and 78 mph.
• 12-Volt Battery Drain and Failure: Repeated 12V battery failures cause vehicle startup issues and electrical malfunctions.
• Wiring Harness and Airbag Safety Concerns: Poorly routed wires under the seat lead to expensive repairs and potential safety hazards.

2025 Hyundai IONIQ 5 Complaint Summary

Top Problem #1: ICCU and High-Voltage Electrical Failures

One of the most frequent and critical issues reported relates to failures in the Integrated Charging Control Unit (ICCU) and related high-voltage electrical components. Owners document sudden stalling events and inability to charge, sometimes leaving them stranded unexpectedly.

Owner symptoms reported to NHTSA and dealers include:

• Vehicle stalling while driving, especially after DC fast charging
  Warning messages related to the charging system appearing briefly before power loss
• Delayed or unavailable repair parts leading to extended downtime
• Repeated ICCU failures in new vehicles, sometimes within weeks or months
• Lack of loaner vehicles and poor manufacturer communication during repairs

Here’s what one owner shared:

“These cars still have problems keeping the 12v charged. [The] car was leased on Jan 19. 12v first died on Feb 15, took it to [the] dealer where they trickle charged it. 12v died again on Feb 18, dealer replaced the 12v. The 12v died again on Mar 11 and is still at [the] dealer service center. Case with Hyundai corporate was opened and the dealer is going back and forth with them. When [the] car is left alone for 5 days, the 12v appears as needing a replacement, so there is something wrong with the system that keeps the 12v charged or there is some parasitic drain somewhere that is hard for the Hyundai engineers to diagnose.

Top Problem #2: Driver Attention Warning System Malfunctions

The Driver Attention Monitoring System (DAMS), specifically the Forward Attention Warning (FAW) feature, has generated extensive complaints. Intended to track driver focus and improve safety, FAW instead often triggers false alerts.

Reported symptoms include:

• Repeated beeping and warnings despite driver attentiveness
• System disabling adaptive cruise control and lane keeping assist unexpectedly
• Frequent false alarms triggered by normal use of prescription or sunglasses
• Inability to fully deactivate the alerts, causing distraction and frustration
• Safety concerns due to disabled driver assistance features during false warnings

One owner stated:

“’Forward Attention Warning’ when driving, the vehicle randomly and repeatedly warns the driver to pay attention to the road even when the driver is facing forward and paying attention to the road. The system will also randomly and repeatedly alarm, disable cruise control and apply the brakes even when the driver has both hands on the wheel and is facing forward. This has nearly caused crashes.   Hyundai states the system is working as designed and suggested: 1. Driver is too tall for the system [/can’t] see my eyes.  2. Do not wear prescription glasses. 3. Do not wear sunglasses.  Research has revealed hundreds and hundreds of similar complaints. Hyundai has issued a technical service bulletin 25-GI-001H stating there is nothing wrong with the vehicle and states drivers who are tall, short, wear glasses will experience this.”

Top Problem #3: Unexpected Power Loss and Acceleration Hesitation

Another serious problem involves sudden power loss or hesitation during highway driving. This issue manifests as surging or pulsing acceleration and unpredictable braking.

Owner-reported symptoms are:

• Vehicle hesitating or shuddering at highway speeds, often during steady acceleration. Most owners say between 60 and 75 mph
• A feeling of the motor cutting in and out, causing forward-backward jerking
• Activation of the “power limited” turtle mode at unexpected times
• Dealer acknowledgment but no current fix available
  Safety risks due to impaired vehicle control in heavy traffic

Here’s one example complaint:

“[The] vehicle will hesitate/shudder and pulsate at highway speeds. Between 57mph and 78mph seems to be where I can feel it the most. This happens on all drive modes and with or without brake regeneration turned on or off. Nothing seems to make it worse or better. Here is an example. If you are driving 65mph on the highway and holding your speed steady, the car motor feels like it’s cutting in and out. Juddering forward and back. If you accelerate a tiny bit, it gets even worse. It feels almost like the input signal from the pedal is choppy, causing the car motor to judder. It is a forward to back motion. Not a vibrate or side to side motion. I took the car to the dealership where they confirmed they could feel it too. They ended up rotating my tires… Said that’s all they can really do because Hyundai doesn’t have any more information. They basically said sorry but they can’t help..”

What Should You Do If Your 2025 Hyundai Ioniq 5 Is a Lemon?

A “lemon” is a vehicle with significant defects impairing its use, value, or safety that remain unresolved after a reasonable number of repair attempts under warranty. If your 2025 Ioniq 5 experiences recurring issues like these, you should take clear steps:

• Document all problems including dates, descriptions, and repair attempts
• Keep copies of repair orders, dealership communications, and warranty claims
• File complaints with NHTSA and your state’s consumer protection agency
• Understand your state’s lemon law protections and eligibility requirements

Lemberg Law offers free case evaluations to help vehicle owners understand their legal options. If your vehicle has repeated problems, you may qualify for a refund, replacement, or cash settlement under state lemon laws.

Think your 2025 Hyundai Ioniq 5 might be a lemon? Contact Lemberg Law today for a free consultation and explore your legal options.

About the Author:

Sergei Lemberg is an attorney focusing on consumer law, class actions related to automotive issues, and personal injury litigation. With nearly two decades of experience, his areas of practice include Lemon Law (vehicle defects), Debt Collection Harassment, TCPA (illegal robocalls and texts), Fair Credit Reporting Act, Overtime claims, Personal Injury cases, and Class Actions. He has consistently been recognized as the nation's "most active consumer attorney." In 2020, Mr. Lemberg represented Noah Duguid before the United States Supreme Court in the landmark case Duguid v. Facebook. He is also the author of "Defanging Debt Collectors," a guide that empowers consumers to fight back against debt collectors and prevail, as well as "Lemon Law 101: The Laws That Lemon Dealers Don't Want You to Know."

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