Complaint 2144545
2016 HYUNDAI ELANTRA • ENGINE • incident Aug 1, 2025
Complaint Summary
ENGINE
Owner Narrative
I own a 2016 Hyundai Elantra, and the engine makes a noticeable knocking or âtappingâ noise when started cold. The sound resembles piston slap and usually lessens as the engine warms up, but itâs been gradually getting louder over time. Itâs most noticeable for the first few minutes after startup, especially in cooler weather. Iâm concerned this may indicate premature piston or cylinder wear. Iâve 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 shouldnât be happening at this mileage. This could eventually lead to engine failure or costly repairs if the piston or cylinder surfaces deteriorate further. Iâm reporting this so NHTSA can track the issue and determine if it poses a broader reliability or safety concern.
Owner-submitted narrative on file with NHTSA. Complaint narratives are self-reported and have not been verified.
Related
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