2020 Hyundai Elantra transmission problems

Filed Oct 30, 2026 · Transmission · OH

I am reporting a serious transmission problem with my 2020 Hyundai Elantra, which has approximately 66,000 miles I purchased this vehicle from a private seller approximately two months ago. At the time of purchase, the vehicle drove great, and I noticed no mechanical issues or unusual noises. After only two months of ownership, I began hearing a grinding noise coming from underneath the vehicle. The noise has progressively gotten worse and is now extremely loud. I took the vehicle to a professional mechanic, who inspected it and determined that the problem is the transmission. Although the vehicle still drives, the grinding noise is extremely concerning, and I am worried about the possibility of the transmission failing completely while I am driving. I find it alarming that a 2020 vehicle with only approximately 66,000 miles is experiencing what a mechanic has identified as a transmission failure. The vehicle has a rebuilt title, but there is no insurer "Total Loss" record showing in the vehicle history information. I have also checked for recalls associated with the VIN and have not found any except I did get a letter with a campaign recall I am requesting that the federal safety agency investigate whether this is a potential safety-related transmission defect affecting the 2020 Hyundai Elantra and whether other owners may be experiencing similar problems. I am a single mother who depends on this vehicle for transportation and caring for my family. I paid a substantial amount of money for this vehicle and have only owned it for two months. I am now facing what could be a very expensive transmission repair. My concern is not simply the financial burden. It is the safety risk of a transmission failing unexpectedly while the vehicle is being driven. I am asking that this complaint be documented and reviewed to determine whether further investigation into transmission problems with this model is warranted.

Filed Aug 29, 2026 · Transmission · OR

Transmission TCM/IVT had a service campaign recall #963 for TCM relearn / IVT replacement for premature transmission failure. Hyundai USA and dealership Big Star Hyundai of Friendswood, TX have made claims of the repair being done. Service records indicate there was no replacement, relearn or anything transmission related done with the vehicle and Hyundai USA has claimed on their end that their records show it was completed, but refuse to show or display records of completion, and have not maintained outreach to the dealership regarding maintenance records for this specific issue. Transmission has popped a P0867 code at 65,000 miles, just outside of it's warranty, and reflects the same codes listed for an issue regarding the TCM/IVT service campaign 963. The safety risk is the transmission giving way on a highway or some other location where it could potentially lead to an accident or stranding, that could lead to serious injury or death. This puts other vehicles on the road and passengers at high risk for an accident or incident. The problem has been reproduced by my husband, and confirmed with ECM readers. Independent service in Atascocita TX confirmed the check engine light indeed coincided with the P0867 code and that it has to do with the very same recall they have claimed to have supported and completed, which is once again not listed under any service completed on the vehicle. We are attempting to have this component looked at by the dealership, but they refuse to acknowledge the service campaign 963 and allow an inspection of no-charge. My husband has already observed with a endoscope, and observed the transmission fluid, and replaced it, and there was no obvious signs of an issue. There were no previous issues to the vehicle, and no previous lights. After the light for the code came onto the dashboard, the transmission has now struggled to maintain steady fluid transitioning between gears, and has maintained a sluggish and resistance feeling.

Filed Aug 20, 2026 · Transmission · SC

My 2020 Hyundai Elantra SEL experienced a total transmission/IVT failure at 81,185 miles. I paid $4,804.14 out of pocket to have the vehicle repaired at a certified Hyundai dealership, Dick Smith Hyundai Genesis of Greenville, now known as Hyundai of Greenville. The transmission was replaced with a new replacement unit. The replacement transmission has now suffered a second total failure at 117,922 miles, meaning the vehicle has experienced two total transmission failures before reaching 120,000 miles. The repeated failure of the IVT system is extremely concerning, particularly because the first replacement was performed by an authorized Hyundai dealership and the replacement unit failed after approximately 36,700 miles. I am requesting that this repeated transmission failure be documented and investigated. I also believe Hyundai should review the vehicle’s transmission history and consider the possibility of a systemic defect or premature failure involving the IVT system. I have already contacted Hyundai Customer Care regarding a Prior Repair Goodwill Reimbursement request for the $4,804.14 I previously paid out of pocket. Hyundai Customer Care case #43147944 was denied based on the vehicle being outside the factory warranty, although Hyundai directed me to the dealership for possible goodwill consideration. I am requesting full retroactive reimbursement of the $4,804.14 I paid for the first transmission replacement. I can provide the original repair invoice, service records, diagnosis, and documentation of the subsequent transmission failure upon request.

Filed Jun 12, 2026 · Transmission · AZ

Reporting on 2020 Hyundai Elantra. I have owned since 2023, my car is currently at a Hyundai certified dealership for it's 3rd transmission in the three years I have owned it. All 3 transmission were inspected and then replaced by Hyundai certified technicians. The Safety aspect is the inability to get you vehicle off the highway.

Filed Jun 9, 2026 · Acceleration, Engine · NJ

Currently, there are 30,564 miles on my vehicle and I am the original owner of the vehicle since early 2021. This is a continuous intermittent problem that can occur at any time when trying to accelerate the vehicle. The vehicle could be moving down the road and you go to accelerate and the RPM's drop dramatically, giving you no power. The same thing has happened when trying to accelerate from a stop. The vehicle would start to accelerate and then all of a sudden the RPM's drop, giving you no power. I have had the vehicle to the dealership for this problem and I am being told that they can't do anything about it because they can't duplicate it. If this happened when it was necessary for me to get out of the way of a vehicle, an accident could occur, resulting in sirius injury or death. Also, there were no warning lights or check engine light that came on at any time when the problem presented itself.

Filed May 22, 2026 · Transmission · CA

I bought a 2020 Hyundai Elantra in 2024 with 67k miles on it. After driving 22k miles the check engine light went on and when it was brought in to get it checked the transmission went out. I did not buy a warranty so I understood it would not be covered. The issue I had was it was very hard to get information on the condition of the car that was sold to me. What I found out was that the transmission fluid was likley not changed ever and definetly not checked before the car was sold since the check engine light was not on and the engine sounded fine when I bought it. Which when I did meet with the service manager was informed of. The service manager noted that the IVT transmission has a long history of going out and is a bad design. He stated that most cars are not being made with it anymore and that this is well known problem. My biggest issue is that they knew this when it was sold and since the car was already over 60k when they got it should have at least checked the fluid or put in new fluid due to the history of transmission problems on the car. It is very likely this was not done to the likelihood the fluid was already bad and the transmission would have gone out so they wanted to pass it on to the customer. I know it is on me to know about a car when it is purchased but did not think of checking specifically on what type of transmission was in the car and now always will. I have had two Hyundai and both went over 200k without problem. To have one go 89k and go out was totally unexpected and there were no warnings except a check engine light. The service manager was nice but told me there was nothing that could be done.

Filed May 15, 2026 · Engine, Transmission · 76,000 miles · NC

The contact owns a 2020 Hyundai Elantra. The contact stated that while driving at an unknown speed and at a stop, the vehicle lunged forward. The RPM increased and decreased without applying the accelerator pedal. The check engine light was illuminated. A mobile mechanic reset the codes but was unable to determine the failure. The vehicle was taken to an independent mechanic who referred him to the local dealer. The local dealer was contacted, who stated there was a transmission pressure sensor issue. which prevents the service from being performed under Hyundai Service Campaign 863 T5B Bulletin: 20-01-028H. The manufacturer was contacted, but no additional assistance was provided. The failure mileage was approximately 76,000.

Filed May 5, 2026 · Acceleration, Transmission · 106,000 miles · GA

The Contact owns a 2020 HYUNDAI Elantra. The contact stated while operating the vehicle at an undisclosed speed, he noticed that his RPM were going back and forth while on cruise control, after removing cruise control the vehicle stayed the same. The vehicle was pulled over and restarted but the vehicle was hesitating to accelerate and noticed a issue with the gears not. The vehicle was towed to a independent mechanic but was not fully diagnosed due to the transmission driving forward when in neutral. The dealer was notified of the failure and a appointment was set for a later date. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 106,000.

Filed Mar 26, 2026 · Engine, Fuel system · NV

I see there was a P0420 error code related to catalytic converter oil consumption recall, but when I put in my VIN it said no recalls. This is for a 2020 Hyundai Elantra 2020. The problem comes and goes and was able to be reproduced or confirmed by a dealer Hyundai. The warning lamps, messages comes on frequently and was reportedly fixed charges $2000 for a sensor. I the code and it is all over the internet that it is a recall.but does not show up with VIN.i need assistance with getting this fixed at the dealer

Filed Dec 30, 2025 · Transmission · NE

Was driving car after a recent oil change. The oil change was performed early because the car was ticking and found oil to be low. Was going to take into dealer to be looked into but the car made a loud sound and stopped immediately and turned off. Luckily I was not driving too fast but had I been this could have posed a risk to myself, my passengers and other drivers. This complaint is consistent with prior engine failure complains of other Hyundai models. The Elantra has yet to be investigated. The maintenance lights that came on have only been for a high mount break light and low tire pressure. I did not get a low oil or oil change needed alert.