2015 Hyundai Sonata: shudder or vibration when accelerating

Filed Jun 26, 2025 · Engine, Transmission · IA

Our 2015 Sonata has experiencing Engine failure several times due to excessive and irregular oil consumption. Our family’s safety and the safety of others on the roadway were put at risk as the engine slows, shudders and stalls without prior warning and the check engine light does not come on until the vehicle slows and stalls. The vehicle was inspected at a local Hyundai dealership, and they indicated that this is not covered under warranty. Summary of Engine Issues and Failures: 1.May 3, 2022 – 68,671 miles (local Hyundai dealer) Check engine light on, shudder; oil change performed. No cause identified. Paid out-of-pocket. 2.August 23, 2022 – 75,527 miles (retail shop) Car engines failed on highway, towed to service shop. Valve cover gaskets replaced. Paid out-of-pocket in part and extended warranty paid part of the invoice. 3.April 29, 2024 – 109,229 miles (local Hyundai dealer) Excessive oil consumption noted; valve cover gasket replaced again. Paid out-of-pocket. 4.January 22, 2025 – 118,341 miles (local Hyundai dealer) Vehicle stalled en route to airport, towed to dealership; dealership advised oil change. Paid out-of-pocket. 5.May 20, 2025 – 122,000 miles (local Hyundai dealer) Engine codes P0300, P0302, P0303 identified. Dealer diagnosed excessive oil consumption likely due to ring wear or sticking rings, contributing to spark plug misfires. Recommendation: Engine replacement. Despite consistent and timely service, including multiple visits to the Hyundai dealership, the root issue has not been properly addressed. The current diagnosis of internal engine failure is a clear continuation of a pattern of unresolved engine problems (stalling in motion, oil leaks and oil consumption) all of which originated well within Hyundai’s original warranty. The vehicle has been well maintained, and all recalls have been addressed in a timely manner. Hyundai’s failure to acknowledge and take responsibility for this widely documented engine issue is a safety concern.

Filed Aug 28, 2024 · Engine · 152,550 miles · KY

The contact's husband owns a 2015 Hyundai Sonata. The contact stated while the vehicle was at an independent mechanic for an oil change, the contact was informed that the vehicle was experiencing excessive oil consumption and that it was a known failure. Additionally, the contact stated while driving 73-74 MPH, the vehicle shuddered and stalled. The contact was able to pull to the side of the road. The vehicle failed to restart and was towed to an independent mechanic, where it was diagnosed that the rod bearing had caused engine failure. The dealer determined that the engine needed to be replaced. The mechanic informed the contact the failure was due to a factory defect and would reoccur even after the engine replacement. The vehicle was taken to the dealer, where the same assessment was made. The dealer filed a claim with the manufacturer and sent a diagnostic report with pictures of the failure; however, the manufacturer denied the claim several times. The contact stated that the engine was previously replaced. The manufacturer was notified of the failure. The failure mileage was approximately 152,550.

Filed Mar 20, 2024 · Engine · 95,000 miles · NC

The contact owns a 2015 Hyundai Sonata. The contact stated when starting the vehicle, the vehicle experienced a hard start and shuddered. No warning light was illuminated. The vehicle was taken to an unknown dealer, where washer fluid was poured into the vehicle. The vehicle was then taken to an independent mechanic, who informed the contact that the oil was 2 quarts low, and the mileage was below the next recommended oil change. The contact stated that the failure recurred. The vehicle was taken to an unknown second dealer, where the contact was informed that no signs of oil leak and smoke were found during the inspection. The dealer determined that oil could be leaking in the engine. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 95,000.

Filed Feb 9, 2024 · Brakes, Engine · 60,000 miles · MA

The contact owns a 2015 Hyundai Sonata. The contact stated that the engine was consuming an excessive amount of engine oil. There was no warning light illuminated. The contact was frequently topping off the engine oil between scheduled oil change service. The vehicle was taken to a dealer and a 3,000-mile oil consumption test was performed. The test concluded that the vehicle was consuming an excessive amount of engine oil. The contact rejected the results. In addition, the contact stated that the brake pads were frequently replaced due to the vehicle shuddering upon the depression of the brake pedal. The manufacturer had been notified of the failure. The vehicle was not repaired. The failure mileage was approximately 60,000.

Filed Apr 7, 2022 · Engine · 142,000 miles · CA · fire

The contact owns a 2015 Hyundai Sonata. The contact stated while driving at 45 MPH and approaching a stop sign, the vehicle started shuddering and stalled. The contact noticed smoke coming out of the hood of the vehicle. There were several unknown warning lights illuminated. The contact was unable to restart the vehicle after several attempts. The contact was able to push the vehicle to the side of the road with the assistance of a bystander. The vehicle was towed to an independent mechanic who informed the contact to take the vehicle to the dealer for repair. The vehicle was then towed to the dealer where it was diagnosed that the engine had failed and needed to be replaced. The dealer sent a claim with diagnostic report to the manufacturer ; however, the manufacturer declined to cover the repair. The contact followed up with the manufacturer and was informed that they could not assist as she failed to complete an unknown software update, under Service Campaign Number: 553, designed to report vehicle imbalances prior to the engine failure. The vehicle was not repaired. The failure mileage was approximately 142,000.

Filed Dec 27, 2021 · Engine · AL

While traveling on the interstate, the car started shuddering. Pulled off and went to auto part store and they read the code #4 misfire. Took car to my mechanic and he said #4 cylinder was dead. Proceeded to take car to dealership and they said #4 cylinder had burn valve with hole in valve. We hey gave a quote for engine replacement. Took car back to my mechanic and he replaced engine at a cost of $5466.28. The replacement engine was a 2014 with 13k miles. The car only had 107186 miles at time of incident.

Filed Aug 20, 2021 · Transmission · TX

Transmission shudder, reverse gear not working, stuck in 3rd gear.

Filed Jun 8, 2021 · Engine · 65,000 miles · TX

The contact owns a 2015 Hyundai Sonata. The contact stated while driving at various speeds, the vehicle experienced shuddering, loss of power and acceleration. The vehicle was taken to the local dealer who diagnosed that the engine was faulty and needed to be replaced. The vehicle was not yet repaired. The manufacturer was notified of the failure. The failure mileage was 65,000.

Filed Jun 27, 2019 · Transmission · 25,000 miles · WA

Vehicle shudders and shakes and loses power (without completely stalling) when accelerating from a complete stop such as pulling out of a driveway or at an intersection. Dealer reset the computer and it helped for a few hours, then started acting up again.

Filed Jul 25, 2017 · Transmission · 16,000 miles · NC

Transmission shudders, disengages in motion making the car hesitate, stall and buck this usually occurs when pulling into traffic from a stand still...or when backing or moving forward slowly as in bumper to bumper traffic or when in a drive through..

Filed Nov 27, 2016 · Engine, Fuel system · 13,500 miles · TX

Shortly after exiting interstate and slowdown for signal, I attempted to accelerate and the vehicle was totally unresponsive, like I wasn't even giving it gas. I have had it serviced twice and towed once for stalling while driving, shuddering, sputtering. Took waiting and numerous attempts to get it restarted. The second time, the dealer kept it for a week in october and could not find anything. (this is my second complaint as I want all this documented). Doesn't mean it doesn't exist. They replaced the fuel pump. I just drove it back from out of town this weekend (300 miles) and I noticed the acceleration was quite sluggish especially when trying to accelerate to pass. It was like the passing gear would not engage. Afraid my car would just stall again, I did not pursue heavy acceleration or passing gear attempts any further. Then this happened today. I feel there is something definitely wrong with this vehicle, and that every time I drive it, I am at some kind of risk. Saw some other complaints about ECM. The problem needs to be identified and corrected; this is definitely a safety issue, especially at high speeds or heavy traffic. There is definitely something wrong here.

Filed Oct 26, 2016 · Acceleration · 24,000 miles · CO

I bought my car in august 2014 and ever since 2015 around january/february I have had this problem, the car either braking or accelerating "surges" and I have complained to the dealers but they can't find the problem as well as it sometimes cuts off at a light or when accelerating it shudders like it's going to die but they can't (or won't because it's still under warranty) find the problem but it is a concern to me when driving and I'm not saying they aren't seeing it but I wonder if anyone else has this problem with the sonata.