2017 Hyundai Elantra: sudden loss of power

Filed Oct 24, 2026 · Engine · UT

Vehicle Information: Year/Make/Model: 2017 Hyundai Elantra Value Edition Mileage: ~135,000 miles Engine: 2.0L Nu 4-Cylinder VIN: [XXX] Incidence Summary: Engine internal failure, metallic debris/shavings found in oil, severe knocking noise, high risk of sudden engine stall/failure while driving. Detailed Description of the Incident: While driving home, the vehicle began producing a loud, severe metallic knocking noise from the engine compartment. The engine continued running, but the noise persisted throughout the trip. Upon inspecting the vehicle, a certified mechanic removed the engine oil and discovered a significant amount of metallic debris and metal shavings inside the oil pan, indicating severe internal engine component wear (connecting rod bearing / crankshaft failure). The mechanic advised that the engine is at immediate risk of seizing or experiencing complete catastrophic failure. Safety Risk: A sudden engine failure or seizure while driving on a highway or at high speeds creates a critical safety hazard, as it can cause an immediate loss of power, loss of power steering/braking assistance, and significantly increase the risk of a crash or rear-end collision for me and surrounding traffic. Current Status: The vehicle is no longer safe to drive and has been grounded to prevent complete engine lockup or serious road accidents. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Sep 11, 2026 · Engine · VA

I bought my 2017 Hyundai Elantra SE earlier this year with about 119,000 miles. It had good maintenance records when I bought it, and it now has about 128,000 miles. Since buying it, I've had two oil changes done along with new spark plugs, coils, front brake pads, and tires. About two days before the engine failed, I noticed the car had suddenly burned through a significant amount of oil. There was no visible oil leak. The car stopped running, so I had it towed instead of continuing to drive it. Oil was added, and afterward it started and seemed to be running fine.The next day, I was driving approximately 70 mph on the interstate when the car suddenly lost acceleration and warning lights came on. There was smoke while I was driving, including smoke/fumes coming into the car. Afterward, there was oil everywhere. The car had to be towed again and is no longer drivable.What concerns me most is how quickly this happened. The car went from suddenly consuming oil with no visible leak to losing acceleration and experiencing a major engine failure while I was traveling 70 mph on the interstate. Losing power at that speed was dangerous, and the amount of oil and smoke also made me concerned about the possibility of a fire. Hyundai has told me the vehicle is no longer under warranty. I have not paid for an extensive engine teardown yet. My grandfather looked and he said it appears the engine threw a connecting rod through the side of the engine block. With the valve cover off, the engine looked brand new. I'm filing this complaint because an engine suddenly losing power at interstate speeds, along with oil and smoke, is a serious safety concern, especially with the potential for a fire. I hope the federal safety agency will compare this incident with other complaints involving engine failure and excessive oil consumption in 2017 Hyundai Elantras. Currently, it's available for inspection.

Filed Jun 23, 2026 · Steering · AZ

While driving and turning, the car loses power steering. This has happened multiple times to my wife at lower driving speeds. These disconcerting safety incidents have randomly occurred without warning since the first week of May. The incident was first reported and taken to the Hyundai dealership on May 6th. The dealer looked at the car and stated no issues with steering. It has occurred multiple times since then. The last incident occurred on June 9th at 4pm at Phoenix Sky Harbor Airport. The car lost power steering control, a warning light briefly flashed and the engine shut off. I recovered the car and restarted it. The power steering reset itself. The car was taken a few days later to a Hyundai Dealer who has had the car since attempting to diagnose the issue. The dealer is now stating we should just replace the entire steering column assembly.

Filed May 22, 2026 · Transmission · NE

What component or system failed or malfunctioned, and is it available for inspection upon request? How was your safety or the safety of others put at risk? The ignition coil in my 2017 Hyundai Elantra Limited has failed multiple times over the past several years. This recurring issue has caused the vehicle to malfunction unexpectedly, creating safety concerns due to reduced engine performance, misfiring, and the potential for sudden loss of power while driving, which puts both myself and others on the road at risk. The failed component is available for inspection upon request. Has the problem been reproduced or confirmed by a dealer or independent service center? This issue has occurred multiple times with my vehicle. After researching online consumer reports and owner complaints, I found that ignition coil failures appear to be a common and recurring issue reported by other 2017 Hyundai Elantra Limited owners. Based on these repeated failures and similar reports, this appears to be a known issue affecting this model. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives, or others? I have reported this issue to Hyundai multiple times. Rather than addressing the root cause or issuing a recall for this recurring defect, Hyundai has repeatedly provided credits to assist with repair costs when the ignition coil fails. Despite the repeated failures and safety concerns, the underlying issue has not been permanently resolved. Were there any warning lamps, messages, or other symptoms of the problem prior to the failure, and when did they first appear? Prior to failure, the vehicle would experience rough starts, engine misfires, and poor performance. After these symptoms began, the check engine light would eventually illuminate. Once the warning light appeared, the vehicle became increasingly unreliable and would stall or shut off unexpectedly. On one occasion, the vehicle shut off completely while I was driving.

Filed Apr 22, 2026 · Acceleration, Electrical · CO

I own a Hyundai Elantra with approximately 103,000 miles. The vehicle has developed an intermittent issue where the engine will suddenly stall while driving. This most often occurs when I am decelerating and turning, such as when entering or navigating roundabouts. At the time of the stall, multiple warning indicators appear simultaneously, including the check engine light, battery warning light, and a “no key detected” message. There are no prior warning signs before the failure occurs—no unusual noises, no loss of power leading up to the event, and no dashboard warnings in advance. The stall is sudden and unexpected. When the vehicle stalls, I must quickly shift into park and restart the engine. The car restarts immediately without hesitation, and all warning lights disappear. The vehicle then operates normally again until the issue randomly reoccurs. This has happened multiple times. This issue creates a safety risk because the vehicle loses power unexpectedly while in motion, particularly during low-speed turns and in roundabouts, which could increase the risk of a collision due to sudden loss of propulsion and reduced control. The problem has not yet been formally diagnosed by a dealer or independent repair shop, but based on research and similar reported cases, it may be related to an intermittent engine or electrical signal failure. The issue has not yet been inspected by the manufacturer, police, or insurance representatives. UNKNOWN as to the exact failed component, but the failure appears to involve a sudden loss of engine operation without warning, followed by immediate recovery upon restart.

Filed Mar 20, 2026 · Electrical, Engine · TX

I am filing a formal complaint regarding my 2017 Hyundai Elantra SE (VIN: [XXX] ). The vehicle is currently experiencing severe safety issues, including unexpected engine stalling and loud mechanical rattling, alongside a P0014 diagnostic code. These symptoms align directly with the defects described in Recall 203 (the federal safety agency 21V301000) involving improper piston ring heat treatment and Service Campaign 966regarding engine bearing wear. As a consumer, I am extremely concerned about the risk of a crash due to sudden loss of power. I am really concerned for my son and I as I drive my vehicle. I am requesting: 1. An immediate inspection and confirmation of eligibility for an engine replacement at no cost to me. 2. Verification of the lifetime long-block warranty extension associated with the KSDS (Campaign 966) update. 3. Provision of a loaner vehicle or rental reimbursement while my primary vehicle is unsafe to operate. Please assign a case manager to this matter and provide a timeline for resolution. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Mar 8, 2026 · Engine · NJ

Car was constantly losing power, called Hyundai dealer about the OBI system thinking that could be the cause they told me no, and then in 2 years ago the car started stalling when you slowed down and on the way home from work it completely died. Car still turns over but car will not go, engine and transmission are completely done. It’s been at my house sitting since. Hyundai dealer is a joke a wouldn’t help when the issue first arised.

Filed Jan 6, 2026 · Steering · 18,000 miles · TX

The contact owns a 2017 Hyundai Elantra. The contact stated that while driving approximately 40 MPH, the steering wheel became difficult to turn to the left or the right. The contact stated there was no warning light illuminated. The contact had taken the vehicle to an independent mechanic, where it was diagnosed and determined that the power steering module needed to be replaced. The mechanic advised the contact of the federal safety agency Campaign Number: 17V213000 (Steering) and referred the contact to the dealer. The vehicle was not repaired. The contact called a local dealer and was informed that the VIN was not included in the recall. The contact stated that the loss of power steering functionality was intermittent but gradually became a recurring failure. The manufacturer was not informed of the failure. The failure mileage was approximately 18,000.

Filed Aug 14, 2025 · Body, Engine · PA

Rapid loss of power failure of ignition coil. Happened for all four. Suddenly unable to open front or rear doors on passenger side. Actuator failures. Both of these conditions reported to hyundai, my complaint is that hyundai is well aware of these pproblems dealer confirmed they are common across models. They are expensive repairs. Why are they not recalls. Coils happened about 2023 with 55000 miles (out of warranty). Doors are current and I cant afford $2000 for repair.

Filed Aug 14, 2025 · Engine · OH

While driving down the road, the car lost complete power. No warning lights came on until after the car had lost power. Car struggled to start back up. I put flashers on in hopes that others would notice my disabled vehicle in the middle of the road, while it was also pouring down the rain. The vehicle was towed to my local dealership where it was confirmed that I would need a new engine. The engine had a high oil consumption issue that caused it to stale while driving. The dealership informed me either there was a rod bearing issue or a piston slap in the engine. They recommended to park the car until fixed

Filed Jun 17, 2025 · Engine · 150,000 miles · MI

The contact owns a 2017 Hyundai Elantra. The contact stated that after starting the vehicle, the vehicle lost automotive power and then lost power after driving a short distance. No warning light was illuminated. In addition, there was an abnormal sound coming from the engine. The vehicle was taken to a local independent mechanic; however, the failure was not replicated. The contact stated that the vehicle was previously taken to the same independent mechanic, and the spark plugs were replaced. The local dealer was contacted; however, the vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 150,000.

Filed Jun 12, 2025 · Engine, Transmission · FL

Timing chain looseness, Sudden loss of engine power/motive power. Vehicle was sold, unknown if available for inspection. Engine failure on and in the middle of the interstate/highway, and this caused a major crash risk, and safety hazard. This make and model of vehicle has multiple reports of similar incidents. The repairs would’ve cost over 3 times the value of the car. As stated by the vehicle manufacturer, the entire engine would need to be replaced, with a factory built engine in order to comply with the federal safety agency and safety regulations. I’m no longer in possession of the vehicle. It was sold. While the vehicle was operating, and drivable there would be a chime and a flashing check engine light/indicator on occasion. Although no codes were present at maintenance center, therefore unable to identify the exact cause.