Hyundai Elantra Complaints (2021)

162 consumer complaints on file.

#11702957December 4, 2025
ELECTRICAL SYSTEM:INSTRUMENT PANEL:SPEEDOMETER/ODOMETER
Odometer Fraud. The contact purchased a 2021 Hyundai Elantra. The contact stated that it was discovered that there was a mileage discrepancy. The vehicle was a dealer sale. At the time of purchase, the mileage was 51,192 and at the time of receiving the vehicle from the dealer it was discovered that the mileage was 50,310.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11693336October 14, 2025
ENGINE
The contact owns a 2021 Hyundai Elantra. The contact stated that there was a knocking sound coming from the engine compartment while the vehicle was idling. The RPM fluctuated and the vehicle stalled while at a complete stop, and while shifted to park(P). The contact restarted the vehicle and was able to continue driving. The check engine warning light was illuminated. The failure had occurred intermittently. The vehicle was taken to the dealer, who confirmed that the 2.0L engine was known for similar issues. The dealer confirmed that the VIN was not included in NHTSA Campaign Number: 21V301000 (Engine). The vehicle was not diagnosed due to a lack of diagnostic trouble codes being displayed. The vehicle was not repaired. The manufacturer was informed of the failure, and a case was opened. The failure mileage was approximately 127,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11688392September 19, 2025
FORWARD COLLISION AVOIDANCE: WARNINGS
Forward sensors in vehicle have been failing while driving rain or snow since 2021; would go way on its own. Most recent failure has occurred with no debris or obstruction to sensor on a clear and sunny day. The sensor failure has been stagnant and will not go away, increasing a safety concerns while driving.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11685493September 6, 2025
VISIBILITY/WIPER
Windshield wipers will stop midway moving and stay in place at random times while switched on. Not related to rain droplet mode. Happens at random. Obstructs view of road.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11683767August 28, 2025
ELECTRICAL SYSTEM, STEERING
The Horn never worked since I bought it in August 2023, i’ve been in a countless near accident situations where I was rendered helpless. I’ve had several instances where I get locked out of my car because the vehicle would not read the key. I tried fix the issue because I assumed it was a dead car or key battery but the same problems kept happening shortly after. I became aware of the issue with the horn not working, when I recently purchased the vehicle. I tried to contact the ALM dealership salesman to report the issue and they told me he had recently quit. They mentioned bringing it back to the shop but it wasn’t guaranteed that the issue would be fixed.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11678266August 4, 2025
ELECTRICAL SYSTEM, ENGINE, UNKNOWN OR OTHER
Engine shots off while on the automatic stop and go idle . It is being doing it for a while but it is happening more often even with the auto idle off and it even happened at the freeway. It gives me a message to put it in park or neutral and turn the engine on manually. Making this a very dangerous situation because cars behind me don’t know that my engine suddenly shots off. Thanks
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11672296July 9, 2025
ELECTRICAL SYSTEM, EXTERIOR LIGHTING
The headlights and back lights turn off at random times when the headlights are on the automatic setting. This problem happens very frequently at night, putting my family at risk when the lights go off and cannot see what is ahead of us. In addition to a cop pulling me over for not having my lights on and he asked me if I was playing with the lights since they were going on and off and luckily the cop did not give me a ticket when I explained and he saw the problem (he advised me to get on this website and to make a report). I have reported this problem to the Hyundai dealership for the past 3 years and I don’t even think they take the time to investigate. The dealership just keeps telling me that with another update in the software is going to get fixed. But that is not the case. This is a very dangerous problem that is going to get someone killed. Need to be fixed
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11671060July 3, 2025
POWER TRAIN
Check Hybrid System alarmed in heavy traffic and derated my car and put me in a very dangerous situation.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11664871June 4, 2025
FORWARD COLLISION AVOIDANCE: WARNINGS, FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING, FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL
Front sensor problem. Sensor Check Forward Safety System. ABS, Auto Hold light came up out of no where. No damage to sensor.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11662054May 20, 2025
ELECTRICAL SYSTEM, VEHICLE SPEED CONTROL, POWER TRAIN
Unintended acceleration is happening. After about 15-30 minutes of driving, accelerating from a stopped position becomes very difficult in the sense that the vehicle does NOT accelerate when gas pedal is pressed. This can be extremely dangerous as you do not know when the vehicle will no longer accelerate and could get hit when crossing an intersection or turning onto any road at all. ESC warning light came on today and vehicle will no longer start but goes into auxiliary mode. This is not the first time, second, third, nor even 5th time a report on this vehicle has been made and with each report more issues are arising with seemingly NO fix in sight.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11661670May 18, 2025
ELECTRICAL SYSTEM, UNKNOWN OR OTHER, ENGINE
I am writing to report a serious and ongoing safety issue with my 2021 Hyundai Elantra Hybrid that remains unresolved despite multiple visits to Hyundai service centers and independent repair shops. I’ve also found numerous consumer discussions online describing nearly identical issues with the same model and newer Elantra Hybrid models, suggesting this may be part of a wider systemic defect. The core issue lies within the vehicle’s hybrid system. Shortly after a recent system/software update performed at a Hyundai dealership, a warning message began appearing at random intervals stating: “Check Hybrid System.” This typically first appears after extended driving — often around 3 hours — but once it occurs, the issue worsens if I continue to drive. Each time the warning appears, the vehicle suddenly and drastically decelerates without driver input, becoming dangerously slow and unresponsive, even while traveling at highway speeds. This creates an urgent safety risk, as I have had to maneuver off the road quickly to avoid collisions. After the initial warning, if I attempt to drive the vehicle again without sufficient downtime, the warning reappears much more frequently — sometimes within minutes. The only temporary relief is to stop using the vehicle and allow it to rest for at least six hours, after which the issue may temporarily subside. In every case, I must use the 12V battery reset button to restart the car, which I suspect may be clearing diagnostic codes before they can be properly recorded. Notably, the check engine light disappears after this reset, even if it was previously displayed. Given that the hybrid battery is located beneath the rear passenger seat, I am deeply concerned that if there is an underlying thermal or electrical issue, it could pose a serious or life-threatening risk to passengers. To date, no dealership or technician has been able to duplicate or permanently resolve the problem.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11654101April 11, 2025
UNKNOWN OR OTHER
The horn does not work. I've been out of a horn for the last 4 1/2 months. The horn fuse blows every time I replace it and if I use the horn it blows. Now I replace the fuse and the horn still doesn't work on this vehicle
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11647073March 7, 2025
ELECTRICAL SYSTEM
My back up camera fails to work consistently. This issue appears to only worsen with every use. Sometimes to screen will appear half on and half off. I have yet to receive any notice of a recall and would like to get this fixed if at all possible. Thank you!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11644100February 21, 2025
ENGINE
Heating core on car has gone out 3 times the first time costing $2,042.03 to repair, the two follow up ones were done under the warenty
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11643172February 17, 2025
LANE DEPARTURE: BLIND SPOT DETECTION
The camera started to fail for a few days and then it was fine, then the blind spot started to fail and then the camera was useless.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11635269January 10, 2025
ENGINE, ELECTRICAL SYSTEM, UNKNOWN OR OTHER
Constant sound of flowing water throughout the front of the vehicle. Several service appointments later and there is still no solution to the issue that has been going on for over a year. Thia can be heard like a stream of water flowing. Engine ticking, loud rattling from engine. You can hear in from inside of the car.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11632655December 27, 2024
UNKNOWN OR OTHER
I have a safety recall is with a Rear view camera that hasn’t had a solution.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11632318December 25, 2024
ELECTRICAL SYSTEM
The reverse camera does not work
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11631600December 19, 2024
UNKNOWN OR OTHER, LANE DEPARTURE: BLIND SPOT DETECTION, FORWARD COLLISION AVOIDANCE: WARNINGS
High Beam Assist, Check Rear Cross-Traffic Safety System, Check Blind-spot safety system, Check forward safety system, Check Lane Keep Assist System, Traction Control disabled. ALL of those messages came on while driving. Rear backup camera quit working, reverse lights do not engage. No remedy for recall still. Vehicle is unsafe to operate without recall being fixed. This is my only transportation, FIX it!!!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11626822November 22, 2024
FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL, FORWARD COLLISION AVOIDANCE: WARNINGS
Radar equipped to front of vehicle has malfunctioned, disabling all forward safety systems and adaptive cruise control. Without this equipment functioning, cruise control is completely disabled and the vehicle will not automatically brake or provide forward warnings. The vehicle component has not been inspected, but this is a recurring issue amongst other owners of this model. There is a warning lamp that turns out that states "Check Forward Safety System"
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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