{"count":1,"message":"Results returned successfully","results":[{"odiNumber":11696626,"manufacturer":"Hyundai Motor America","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"08/01/2025","dateComplaintFiled":"10/30/2025","vin":"KMHDH4AE4GU","components":"ENGINE","summary":"I own a 2016 Hyundai Elantra, and the engine makes a noticeable knocking or \u201ctapping\u201d noise when started cold. The sound resembles piston slap and usually lessens as the engine warms up, but it\u2019s been gradually getting louder over time. It\u2019s most noticeable for the first few minutes after startup, especially in cooler weather.  I\u2019m concerned this may indicate premature piston or cylinder wear. I\u2019ve found many other 2016 Elantra owners reporting the same problem online, suggesting it may be a design or manufacturing issue. The vehicle has been properly maintained with the correct oil grade and regular service, so this shouldn\u2019t be happening at this mileage.  This could eventually lead to engine failure or costly repairs if the piston or cylinder surfaces deteriorate further. I\u2019m reporting this so NHTSA can track the issue and determine if it poses a broader reliability or safety concern.","products":[{"type":"Vehicle","productYear":"2016","productMake":"HYUNDAI","productModel":"ELANTRA","manufacturer":"Hyundai Motor America"}]}]}