2021 Hyundai Elantra Other Problems

Your transmission intermittently slips and stutters when accelerating in warm weather, causing jerky engagement and hesitation that makes the vehicle difficult to control—especially when merging into traffic or starting from a stop. In cold weather, the problem disappears entirely. This unpredictable acceleration response has created unsafe driving situations and nearly caused rear-end collisions. The transmission fluid may need replacement, or internal transmission components may require inspection and repair.

Your Hyundai's Blue Link SOS emergency system disconnected while you were actively requesting help after running off the road. When you tried to reconnect to the SOS system, it failed to reestablish the connection despite your vehicle having power and an active subscription, forcing you to call 911 from your personal phone instead. This delayed emergency response and resulted in significant towing costs. The issue appears to be a failure of the telematics/emergency call system to maintain connection and allow reconnection during a genuine emergency.

Your check engine light has been on for about two years with codes pointing to your EVAP system's purge valve, even though you've had the purge valve replaced at an independent shop and a smoke test found no leaks. A Hyundai dealership initially claimed to fix it, but the light returned immediately, and mechanics can't determine the root cause without Hyundai's specialized diagnostic tools. You're also now experiencing vibration and jerking during acceleration, and the ongoing check engine light is preventing you from passing vehicle inspections.

Your horn isn't working, and the problem keeps recurring. When you replace the horn fuse, it blows again immediately—both when you try to use the horn and even when you just have it installed. This suggests an electrical short circuit in the horn system that needs professional diagnosis.

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!!!

The horn is a known issue to stop working on the Hyundai Elantra. I have had my car for 10 months, and the horn does not work. This is a very big safety concern and I have been told by mechanics and other Hyundai Elantra owners this is a constant issue.

I bought my 2021 hyuandai elantra on September 7 2023 almost 2 months ago and the emergency braking system comes on pretty often while driving my vehicle on the road and freeway so the brakes will lock on me whenever the car is in drive which could cause a serious crash and probably cause damage over time to brake pads and other things this problem has occurred over 5 times within 2 months

The horn stops working. It is not a fuse related issue. It is the horn itself. There are multiple reports of horn failure in this model, 2021 and 2022, on the internet and social media. There are people reporting that dealerships are also seeing a lot of cars with horn failure. This is a serious safety issue. Someone could go off the road into the woods and crash, unable to signal with a horn that they’re there. Unable to beep their horn to get the attention of a child or animal that is about to run into the road. There are countless scenarios where the horn is important. Cellphones don’t work everywhere… a horn should always work. There are far too many reports of the horn issue for it to not be a manufacture related issue. Please look into this. This could have pretty tragic implications that could otherwise be avoided. I will attach a screenshot from a social media Hyundai group of the 2022 model. I need to get into the dealership to have mine repaired and will do so asap. I’m just very concerned about the safety of everyone. Some are reporting dealerships are not clear about if the horn issue, which involves replacement of the steering assembly, is covered, while others are saying it is.

Two matters: 1) The recall notice "Campaign 216" regarding my 2021 Hyundai Elantra has not yet been remedied nor has Hyundai announce a timeline for a remedy. It is regarding the windshield. 2) Secondly, my horn stopped working 100% and I took it to Hyundai last week and they said a lot of 2021 Elantra's were coming in with broken horns. They ordered me a brand new part that seems as though they redesigned the horn system. It will be replaced this week. I asked if I missed a recall and they said no, the horn problem has not yet required a recall but they seemed to suggest that the horn issue is a real matter effecting their Elantra's. I would hate for other 2021 owners to suffer a horn failure when they actually need it in a real life safety situation. The horn just stopped working. The horn is a safety function and if that is broken what can one do in an urgent matter "yell", not likely. No warning ahead of time...just one day it stopped working with no indicators.

Wireless Apple CarPlay frequently disconnects at random during drives. I’ve got the latest iPhone update, done every reset in the book, and spoke with my dealership and there is NO solution. It is also impossible to use a wired CarPlay function despite a data-USB input. It is a totally unnecessary move to force users into using this failure of wireless technology. The screen will frequently black out for an extended period of time creating a challenge if you are following the navigation. Additionally, you must tap through 3 warning pages before being able to access the streamed maps or other content again. It is distracting, unpredictable, and continuously more frustrating as neither Hyundai nor Apple have provided a solution that works and instead resort to a “blame game” of each other. Furthermore, both companies act surprised when hearing about this issue, but a quick Google search shows many users struggling with no solution in site! This started the week I bought my car (brand new) and has only gotten worse since.

While Driving the car suddenly turns off. It puts me at risk because if I am in a situation where there are other cars, I can be hit and undangering my life and others! This problem happened suddenly and the car restarted only to fail again,multiple times. Towed to dealer /Danbury Hyundai and they claim not to find problem. The car had a full tank of fresh gas. This happened without warning.

In the middle of crossing the Verrazzano Narrows Bridge in New York City, the forward collision warning came on and the braking system automatically engaged REPEATEDLY. I was traveling about 30 MPH and had about 4 car lengths between my car and the one in front. The system kept engaging no matter how much room I put between myself and the car in front of me, and as I was in the middle lane of a bridge in heavy traffic I could not pull over. I always keep a good distance in front when driving, but because of the system inappropriately engaging I almost got rear-ended about four times. I was terrified and this continued to happen until I got off the bridge. I use my car mainly on the weekend, and also travel this bridge almost every weekend and this was the first time this happened but it was terrifying and EXTREMELY DANGEROUS!!!!

Son was in a crash on freeway. He got cut off and hit into rear of vehicle. Elantra is badly damaged. No collision warning. No airbag deployment.

When using Android Auto via wireless connectivity, and when using Map navigation (tried both Google Maps and Waze), the connection will drop over time. This is a distraction concern for folks using navigation assistance in unknown areas, such as when on business trips. When connected via physical cable the issue does not occur.

The contact owns a 2021 Hyundai Elantra. The contact stated while driving 35 mph, the steering wheel locked not allowing the contact to steer the vehicle. The contact stated that several unknown warning lights were illuminated. The vehicle was taken to a local dealer where it was diagnosed with the front camera needing to be replaced and an unknown software updated. The vehicle was not repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 506.

WIRELESS PHONE PROJECTION WHILE USING APPLE IPHONE XR CONTINUOUSLY DROPS WHILE USING MAPS FEATURE. WHEN IT DISCONNECTS I HAVE TO PUSH TWO BUTTONS ON SCREEN. OK AND THEN THE BUTTON TO RECONNECT. SOMETIMES THIS HAPPENS AS MUCH AS EVERY 5 SECONDS. I HAVE NEARLY CRASHED WHILE TRYING TO CONSTANTLY RECONNECT. ESPECIALLY WHEN I AM IN AN AREA I DO NOT KNOW. THERE IS NO OPTION TO CONNECT CARPLAY VIA USB WIRED CONNECTION. THIS ISSUE FEELS LIKE A SAFETY ISSUE. AS IT IS VERY DISTRACTING WHILE DRIVING.