What 90 owners told NHTSA about the 2023 Hyundai Elantra Gt

I purchased a 2023 Hyundai Elantra Hybrid 2023 on December 15, 2023, and since early ownership I have experienced persistent jerking/clunking while slowing to a stop, harsh downshifts, hesitation during braking, and rough transitions between electric and engine power. The issue was first documented around 5,744 miles and continued through approximately six to eight repair/work orders, where dealerships repeatedly described the condition as normal hybrid/DCT behavior while performing software resets, adaptive relearns, and diagnostic checks. After continued complaints, Hyundai Techline became involved and the dealership concluded the vehicle “jerks pretty bad,” leading to a full transmission replacement under warranty. Despite the transmission replacement, the issue persisted and the dealership later confirmed slight clunking during downshifts and discovered a torn engine mount, which was also replaced. The dealership additionally noted that the issue did not occur while driving another Elantra Hybrid or the loaner vehicle, suggesting the condition was specific to my vehicle. I also opened a case with Hyundai Motor America Consumer Affairs regarding the recurring defect and repeated failed repair attempts, but the issue continues despite major drivetrain repairs. Hyundai Motors America Consumer Affairs has not been able to help me with this either. They also didn't provide me with the Federal Agency number when I requested them in order to reach out and seek help from the agencies. Hyundai didn't help me in any way. There were no warnings. They have been able to reproduce the issue but do not want to resolve the issue. I strongly believe no vehicle is designed in a way that it jerks and downshifts in a harsh manner causing distress to the driver/owner.

NHTSA ODI 11738642

The contact owns a 2023 Hyundai Elantra. The contact stated that while the vehicle was at a full stop, the brake pedal was released, and the vehicle surged forward before the accelerator pedal was depressed. The contact stated that the failure was intermittent. There were no warning lights illuminated. The contact had taken the vehicle to a local dealer, who was unable to duplicate the failure. The vehicle was not repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 15,000.

NHTSA ODI 11731508

*The engine began sputtering really bad and the check engine light came on. I brought the vehicle to the dealership that I purchased it from and they recommended a fuel system flush and change the spark plugs. I had them change the spark plugs and the check engine was cleared but still sputtered a bit. So I brought it to my mechanic who does most of my work and his diagnosis was that oil was blowing by and to not drive it and have towed to Hyundai cause they've been seeing all kinds of engine problems on Hyundai's and that they since the warranty was 100k miles and I had just reached 104k miles that they may fix it. It is currently at Hyundai dealership being diagnosed. *I was driving on the interstate when engine began shaking in the middle of rush hour traffic making it difficult to pull over to see if I could see anything. *Independent mechanic replicated and said to not drive the vehicle. *Hyundai is currently inspecting the vehicle now. *Check engine light came on after the violent sputtering of the engine.

NHTSA ODI 11722380

I am reporting a recurring issue with my 2023 Hyundai Elantra where the low oil pressure warning light illuminates consistently during strong acceleration. This is accompanied by a distinct smoky odor from the vehicle. Based on my research into recall 23V-859, which addresses fire risks from a faulty electronic controller for the oil pump in the Idle Stop & Go system, I believe my vehicle is experiencing a related or identical failure. The symptoms strongly suggest that the defective oil pump controller is malfunctioning under load, potentially leading to dangerous overheating and a short circuit.

NHTSA ODI 11689420

The transmission is slipping to the point that I have almost gotten in several accidents due to impatient drives and the car not engaging in gear like it should. Vehicle also has several electrical faults reverse braking system engages at random with nothing in its way,the key not in vehicle warning will sound randomly while key is in vehicle,horn stopped working out of nowhere,while washing vehicle with keys in pocket vehicles key warning system will sound about every 30-60 seconds only when washing vehicle,random front collision warning system with nothing in front of vehicle,seat height adjustment randomly stops working but the rest of the electric seat adjustment works then seat will start working again at random. When taken to dealership for diagnoses the dealer refused to diagnose electrical issues unless I paid out of pocket even though vehicle is under full warranty and all systems listed are warrantied.

NHTSA ODI 11640818

I have been encountering a series of troubling and erratic issues with my vehicle. These problems occur under various driving conditions, including acceleration, steady-state driving, and braking. However, the most prevalent and problematic occurrences seem to transpire during acceleration and braking. During acceleration, I've observed inconsistent behavior. Sometimes, the car shifts smoothly, with minimal torque drop between gears. On other occasions, the vehicle accelerates initially but then abruptly loses all power between gears, resembling the sensation of someone engaging the clutch in a manual vehicle and shifting slowly. This results in a temporary power loss lasting 1-2 seconds, followed by an over-revving and clutch slip, leading to an unintended surge in acceleration. The issues I've encountered during braking typically begin with a chattering noise and vibrations that seem to be an imbalanced or shocked reciprocating mass, I can assume maybe one of the clutches/flywheel . This is often followed by decreased brake pedal linearity, requiring increased brake pedal pressure to stop. This normally results in an unintended aggressive forward jerk just before coming to a stop, akin to someone releasing a clutch on a manual transmission vehicle too quickly when downshifting while the engine speed is too low. One night I went to get diapers for my baby and it was raining and I hit the breaks and the breaks lost control and I crashed into a median wall and my car kept spinning around. Ambulance were called and I was admitted to the hospital with minor injuries.

NHTSA ODI 11622137

The contact owns a 2023 Hyundai Elantra. The contact stated that while driving 55 MPH and above, the RPM fluctuated, and the engine revved loudly. The transmission then seized in 5th gear, and the vehicle lost motive power. No warning light was illuminated. Additionally, the failure recurred while driving at 65–70 MPH with the cruise control activated. The vehicle was towed to the dealer; however, the dealer was unable to duplicate the failure. The failure persisted, and the vehicle made an abnormally loud sound while the transmission was shifted into park (P). The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 20,600.

NHTSA ODI 11570389

The contact owns a 2023 Hyundai Elantra. The contact received notification of NHTSA Campaign Number: 23V526000 (Power Train) however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure. Parts distribution disconnect.

NHTSA ODI 11554787

My 2023 Hyundai Elantra vehicle displays a low oil pressure message when accelerating. Is this related to the recent recall for the electric oil pump assembly that may overheat and increase the risk of a fire?

NHTSA ODI 11537001