2023 Hyundai Elantra

Horn has stopped working. A driver was about to change lanes into my vehicle on the highway, and I went to honk my horn to alert them, but it would not work. It is unclear if the issue is with the sensor in the steering wheel, or with the wiring or horn itself. I have continued to test the horn over the next few days and confirmed that the issue is persistent. The lack of a horn meant I was nearly able to avoid an accident by swerving away from the other vehicle. If there had not been a gap in traffic, I wouldn't have been so lucky. The vehicle is available for inspection. I have an appointment with the dealer on Friday 1/3/25 to have this addressed, likely under warranty. No one else has inspected the vehicle at this time, and there are no warning notifications, etc.

While driving at highway speeds the vehicle will suddenly decelerate forcing vehicles behind said vehicle to make defensive maneuvers to avoid hitting our vehicle. We have taken the vehicle to the dealership twice for this condition. This time we were told it was the EGR valve, but it was on backorder. We are now forced to drive this vehicle until it is repaired.

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.

The vehicle applies automatic emergency brakes when another vehicle passes close by from behind in an adjacent lane, when the Blind Spot Collision Avoidance Assist, feature is set to “Active Assist.” The owner’s manual states that this feature operates when the turn signal is turned on in the direction of the detected vehicle. However, my experience shows that the car applies brakes even when the turn signal is off and the vehicle is driving straight within its lane, without changing lanes. As per NHTSA description automatic breaks to be applied if the driver ignores the warning and tries to change the lane. But Hyundai design applies brakes even if car driven within lane without any warning before applying break

There was a recent over the air software update. Since the update, the speed limit shown on the dashboard, does not match the posted speed limit. This causes the cruise control to change from 70mph, to 55mph. This happened a few times, and always at the same place on the PA Turnpike. Yesterday it did it and there was a tractor trailer behind me. When my car started to decelerate, the driver of the truck laid on the horn because he had to react quickly. I am lucky that he did not hit the rear of my car. This is a safety issue! Also, why does Hyundai feel the need to control drivers speed, especially when there is no government mandate to do so.

Car was breaking hard because of Active Assist despite that no car was in front. It was breaking consistently until I finally was able to disable the Active Assist. Luckily, there was traffic and driving at less than 20mph but this also happened some time last year at the same area where there was no traffic and was going at a minimum speed of 45mph and to have the Active Assist break hard put me at great risk of getting rear ended. I have footage from the dash cam which I unfortunately cannot attach as it's more than the 10MB limit.

The contact owns a 2023 Hyundai Elantra. The contact stated while driving 70 MPH, the vehicle lost motive power and stalled. During the failure the check engine warning light illuminated. The vehicle was taken to the local dealer to be diagnosed. The contact was informed that the cause of the failure was due to faulty motor mount bushings. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 290.

On July 28th 2024, I took my new 2023 Hyundai Elantra to its first oil change at a Take 5 oil change center. They replaced the oil, filter, checked the fluid levels in my car, and topped the fluids off. That evening, I noticed there was a liquid leaking from behind the passenger side tire, and at first thought it was water from the A/C, but in the morning, I noticed a puddle of liquid was under the car. I went back to Take 5 on August 5th and informed them that I believed there was coolant leaking from the vehicle following my oil change. The worker checked and said my coolant reservoir was completely empty, and he refilled the coolant and told me to take it to be diagnosed at a full service auto center. On August 13th I noticed there was a smell of burning metal coming from the engine bay when I turned the car on and took it to a Firestone where they informed me that the radiator cap had failed and was no longer holding the pressure in the radiator, and that almost all the coolant had leaked from my car. I had the radiator cap replaced and kept the original to take to the Hyundai dealership to see if this was a manufacturers defect or the result of improper handling by the Take 5 worker.