2017 Hyundai Elantra engine problems

Filed Nov 9, 2026 · Engine · CA

Bought the vehicle 07/23/26, passed SMOG per California requirements. CARFAX report showed car was recently serviced. While leaving the grocery store on 10/01/26, the car stalled and the check engine light came on. I restarted the car and drove two miles to my house. The next day, I checked the oil and found it was severely low, despite no evidence of a leak. The check engine light was no longer illuminated, so I took the car in for an oil change. As I was leaving the shop, the check engine light came back on; code given was P0017. Repair shop replaced sensors and valves, check engine light stayed on. Repair shop replaced the same parts to ensure they weren't faulty. Check engine light remained on. Spoke to multiple mechanics who all advised this is a known problem with Hyundai but the company won't accept responsibility. Car was taken to dealership on 10/21/26 and underwent a complete engine tear-down ($2100). Dealership is now replacing the entire engine because they couldn't guarantee that replacing specific parts would solve the problem.

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 17, 2026 · Acceleration, Engine · OH

I leased my 2017 Hyundai Elantra new in July 2016 and later purchased it. As of September 2026, it has approximately 77,000 miles. I am reporting two unresolved safety concerns despite repeated repairs and more than five months of seeking assistance from Hyundai. Multiple ignition coils have failed during my ownership. Most recently, I paid approximately $400 for service after another coil failure. Although the check engine light is no longer illuminated, the vehicle continues to struggle to accelerate and abruptly jerks or “burps,” particularly around 30 mph. At times, I must press the accelerator nearly to the floor to gain enough speed to safely merge onto the highway. I commute approximately 40 miles round trip, including stop-and-go highway traffic, and am concerned about my safety. When I reported that the symptoms continued after the repair, the Hyundai dealer said I would need to pay another diagnostic fee while also stating their equipment might not identify the problem without an illuminated check engine light. My driver-side exterior door handle is also completely inoperable. This issue was previously repaired by Hyundai under warranty and a known issue with the model year, but the repair has failed and the driver’s door cannot be opened from outside. To enter my vehicle, I must climb through the front passenger door, lower the driver’s window, exit, walk around the vehicle, reach through the window, and open the door using the interior handle. After more than five months of contacting Hyundai and seeking service, both issues remain unresolved. I am concerned about the safety of continuing to operate this vehicle and about the failure of a previously completed recall repair. I am requesting that the federal safety agency document and review these safety concerns.

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 Aug 17, 2026 · Engine · 108,404 miles · OK

The contact owns a 2017 Hyundai Elantra. The contact stated that while driving 50 MPH, there was an abnormal knocking sound coming from the engine. The contact pulled over to the right side of the road, turned off and restarted the vehicle, and the vehicle operated as intended. No warning light was illuminated. An independent mechanic was contacted. The vehicle was taken to an independent mechanic where it was diagnosed and determined that the engine needed to be replaced. The engine was replaced, and the vehicle was repaired. The manufacturer was not notified of the failure and referred the contact to the BBB to report the issue. The approximate failure mileage was 108,404.

Filed Aug 11, 2026 · Engine · NJ

Vehicle stalled while driving on a highway without warning. The car was able to start back up, would go a few feet and stall again. Had it towed to a Hyundai dealership to repair. They replaced the exhaust camshaft and timing components. They released the car, saying it was fixed. Less than 12 hours later, the car stalled again while driving through Washington DC. Once again, it would start up again but stall every few feet. We took it to another Hyundai dealership. They replaced the oil pump (saying the oil pressure was too high). That did not fix the issue and the dealership stated that the intake camshaft needed to be repaired. The third party warranty company would not approve that repair, as they are saying the engine needs to be completely replaced. We bought the car in March. The first incident occurred in June and the second incident was 12 hours later. The car has been at the dealership for 'repairs' ever since.

Filed Aug 5, 2026 · Engine · MI

Car wouldn't start. Makes clicking sound. Mechanic diagnosed it and said timing chain is broken, valves are bent and pistons broken.

Filed Jun 29, 2026 · Electrical, Engine · CA

While operating my 2017 Hyundai Elantra under normal driving conditions at approximately 70,000 miles, the engine suffered a sudden, catastrophic loss of motive power and stalled completely while moving in active traffic without any prior warning. This severe stalling event occurred despite the vehicle being strictly and meticulously maintained according to all manufacturer guidelines and scheduled service intervals. Prior to the stall, the Check Engine Light illuminated. A comprehensive diagnostic scan completed at an authorized Hyundai dealership confirmed active trouble codes P0014 (Exhaust Camshaft Position Timing Over-Advanced) and P0017 (Crankshaft-Camshaft Position Correlation Error). The internal physical engine timing assembly and Variable Valve Timing (VVT) components slipped out of synchronization, forcing an abrupt, automatic engine shutdown while navigating active roadways. This failure created an immediate, severe safety hazard and high collision risk due to the sudden loss of vehicle propulsion, power steering assist, and vacuum brake booster pressure, leaving me vulnerable in traffic. This structural timing deviation caused chronic engine misfires and forced raw, unburned fuel directly into the exhaust stream. This unburned fuel completely fouled and destroyed the primary Oxygen (O2) Sensor due to heavy carbon contamination and extreme thermal stress. The failed sensor and incorrect valve timing totally disrupted the electronic control unit's air-fuel management, inducing the unpredictable stalling hazard and causing an immediate, automatic state emissions/smog inspection failure. Repairing this underlying manufacturing and metallurgical defect at the official Hyundai dealership required an extensive mechanical teardown and replacement of the timing components, costing approximately $2,500 out of pocket. This exact failure pattern, cascading O2 sensor damage, and diagnostic trouble codes match hundreds of existing complaints with the federal safety agency.

Filed Jun 3, 2026 · Engine, Transmission · VA

1. The engine architecture suffered a catastrophic mechanical failure. Specifically, severe, systemic internal oil consumption/vaporization starved the hydraulic timing chain tensioner of critical hydrostatic pressure. This caused the tensioner to collapse, creating slack in the steel timing chain, which then "jumped time" (skipped a tooth on the camshaft sprockets), causing the engine to instantly seize and lose all motive power. The vehicle and engine are fully intact and available for inspection at Pohanka Hyundai of Fredericksburg. 2. The vehicle suffered a sudden, complete loss of motive power and engine seizure while being driven at night on an unlit, dark secondary roadway. The driver (my daughter) was left suddenly stranded without power in a highly vulnerable, pitch-black location with passing traffic, presenting an immediate collision hazard and a severe personal safety risk before emergency assistance could arrive. 3. Yes. The vehicle was towed to an authorized Hyundai dealership (Pohanka Hyundai of Fredericksburg), where service technicians officially diagnosed that the engine had "jumped timing" and suffered a complete failure of the timing system, alongside a noted lack of engine oil volume due to vaporization. 4. The vehicle has been formally inspected and diagnosed by the authorized Hyundai dealership service department under Hyundai Motor America Corporate Case #[XXX]. No police or insurance inspections were required as no collision occurred. 5. No dash lights or warnings before failure. However, for a year prior, the engine exhibited severe internal oil vaporization, requiring constant top-offs between scheduled oil changes to maintain safe levels. There were zero external fluid leaks on the engine or ground; oil burned entirely internally. This chronic volumetric oil loss directly caused the sudden drop in pressure, hydraulic tensioner collapse, and catastrophic engine seizure. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Apr 22, 2026 · Engine · FL

Car is burning oil. Replaced timing chain and it continues to burn oil.