Hyundai Genesis loss of power problems

Filed Jul 28, 2024 · Transmission · IL

During normal driving conditions, the 8 speed automatic transmission will randomly hesitate to upshift from 2nd to 3rd and from 4th to 5th, causing an unpredictable loss of power. Symptoms will show up intermittently, and do not seem to be caused by certain events. This is unsafe because the unpredictability of the problem could cause power loss during moments where acceleration is needed to avoid an accident (moments which would otherwise be completely safe, i.e. merging onto a freeway, turning across incoming traffic, right turns into the direction of traffic, etc.) This problem already has a TSB issued by Hyundai. Problem has been reproduce by a technician. Component has been checked by a technician. There are no warning lights or other symptoms before failure.

Filed Apr 18, 2024 · Electrical, Fuel system · 132,705 miles · AZ

The contact owns a 2016 Hyundai Genesis. The contact stated while driving approximately 60 MPH, the electrical power inside the vehicle became inoperable, and the vehicle lost power for approximately 10 seconds before the cabin lights returned to normal functionality. The vehicle was taken to the residence. The vehicle was taken to a dealer, but the vehicle could not be repaired. The contact stated that on another occasion while attempting to start the vehicle, the vehicle failed to start for 10 minutes. The vehicle was taken to a dealer where it was diagnosed that the fuel pump needed to be replaced. The manufacturer was notified of the failure and a complaint was filed. The failure mileage was unknown.

Filed May 25, 2022 · Engine · 39,750 miles · CA

I bought the car new, it has 39k miles on it. 5k miles ago while repairing the water pump under the 10 year powertrain warranty, I reported to the dealership the engine was making bad knocking/grinding sounds at startup and the oil consumption was high. The dealership dismissed this as "normal" for this car. 2 weeks ago the engine seized up without warning, no loss of power or harshness, no engine check light or low pressure warning. I had just left the I15 in rush hour traffic traveling at 70mph. The starter could barely turn the engine, I thought it was a flat battery. After some time I managed to restart the engine that now sounded like a machine gun and limp a few miles home. I tried replacing the oil, which I do on a regular basis, and it contained metal fragments. The warranty expired in Dec 21 but I still contacted the dealership. They have inspected the car and report engine damage requiring $3,200 of parts. Both the dealership and myself have contacted Hyundai Corp. and opened a Consumer Affairs Case on 5/25. Yesterday, 5/24, the case manager spoke to me to get details and obtain evidence I might have including original proof of ownership (documents he should already have). He told me he would have a decision in 2 to 4 weeks. I asked about leaving the car at the dealership, and he replied that it was the dealerships decision, but I would probably need to remove it. I would consider the car dangerous to drive, but the case manager does not seem to consider this and my impression is that Hyundai will refuse any responsibility for this problem. After googling this, I see you have sued Hyundai for what appears to be exactly the same manufacturing problems in other engines from the same time and wonder if these should also apply to the 5.0 liter engines. Has Hyundai acknowledged a problem with these engines and corrected it? If so, why has a recall not been issued, and I not charged for their manufacturing mistake? The dealership has rebuilt the engine and returned my car, charging me $3400.

Filed Apr 19, 2022 · Electrical, Steering · FL

The positive battery terminal has a design flaw where it will wholly lose conductivity with the battery post due to vibrations, stress and age. After numerous dealer visits where "nothing was wrong" I began to diagnose the issue myself. I tracked it down to faulty positive battery terminal, which due to the lack of manufacturer availability I had to correct myself. It seems to be such a widespread but "unknown" issue with the entire vehicle model that I made a repair guide on the subject with photos: https://genesisowners.com/genesis-forum/threads/improved-positive-battery-terminal-box.32768/#post-411757 The primary issue at stake is the sudden, unexpected loss of power steering when maneuvering at low speeds. The vehicle will lose additional safety systems when the battery power is interrupted, such as collision avoidance, parking sensors, airbags and even powertrain control in extreme cases. No manufacturer diagnostic codes will ever be set as the systems in the vehicle do not account for sudden unexpected power loss. Problem is aggravated by objects on trunk floor resting on terminal box. The secondary issue is that when a power interruption occurs while the vehicle is in operation, the vehicle will not properly shut down when the ignition is turned off. Rather than unlocking doors and assisting handicapped drivers via the easy exit seat feature, the car completely dies and does not wake back up. Vigorous door slamming or any other large impact to the body of the car will sometimes bring systems back online, by fractionally moving the positive battery terminal. If systems do not return, the driver is unable to lock the doors or open the trunk. Hyundai does not make the positive terminal a replaceable item, rather, it's only sold as a combined part with a $1400 battery cable (plus 8 hours labor). Dealers and owners alike are averse to replace this part for such a high price, when the battery terminal itself is worth less than $20.

Filed Feb 2, 2022 · Electrical · GA

Vehicle suffered complete loss of power. Would not start on random occasions, but would then power on after lifting trunk cover to access battery. It appears that the positive battery cable connection box has a design flaw in which it helps to support the trunk cover. Over time with loading and unloading trunk, this is causing the terminal to twist and the clamp that holds the battery terminal to the post will eventually not provide enough pressure to ensure a firm connection to the battery. This leads to complete loss of power in the vehicle at any time.

Filed May 17, 2021 · Steering · 6,000 miles · IA

The contact owns a 2015 hyundai genesis. The contact stated while driving the vehicle in cold weather, the vehicle loss power steering assist and became difficult to steer. The contact stated the power steering assist warning light was illuminated. The vehicle was taken to the dealer but was not yet diagnosed. The vehicle was not yet repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 6,000.

Filed Jan 28, 2021 · Electrical, Engine · GA

Complete loss of all power supply and total mechanical system/engine no longer operational

Filed Aug 11, 2020 · 64,600 miles · GA

While approaching a red light on a city street with oncoming traffic, brakes were applied. The car started jerking violently, and the brakes were not working. The car then lost power and then power steering. Fortunately, I was able to man handle the car into a hard right and avoid an accident. This was a life threatening situation. The car was towed to jim ellis hyundai, 5785 peachtree ind. Blvd., chamblee ga for repair. The shop was unable to replicate any problem and did not fix anything related to brakes or power steering. The car was purchased back by the dealer and sent to auction to be sold. So much for the next owner.....

Filed Jan 1, 2020 · Engine · 98,700 miles · PA

My car shut off/the engine lost power, while sitting in traffic. I felt a slight rough idle, then realized all my dash lights were on, and the engine was not running. I placed the car in park, and pushed the engine start button. Car started back up, but every time I stopped I had to place the car in park and keep my foot slightly on the gas to keep it from idling roughly and shutting off again. I had to do this for a half hour until I reached my destination. After setting for 4 hours the car started fine and I had not further issues. But my fear is that it will happen again while in traffic or possibly while driving, which could cause an accident.

Filed Nov 18, 2019 · Steering · 188,000 miles · NC

While driving my genesis 2010 sedan, the battery light illuminated, then the power steering did not respond. I was about 1/2 miles from my house and I had to wrestle with my steering wheel until I got home. The scary part was that I unexpectedly lost power steering during a turn at the traffic light. Luckily, no on coming traffic was near as I completed the turn on the opposite slide of the street. I fortunately arrive home, parked the vehicle and had it towed to the mechanics. I learned that the alternator went out and so did the battery. Luckly, during the turn I did not crash, but it was very nervous the rest of the way.