2024 Honda Civic Si

The engine in my Honda Civic Si failed prematurely at 28,677 miles while the vehicle was still within Honda’s 5-year/60,000-mile powertrain warranty. Honda and the dealership denied warranty coverage based on a recorded engine overspeed event of 6,900 RPM that occurred earlier at 19,259 miles. The engine’s rev limiter is 6,600 RPM, meaning the recorded event exceeded the limiter by only 300 RPM. After this recorded event, the vehicle continued to operate normally for approximately 9,400 additional miles with no warning lights, drivability issues, or indication of engine damage. The engine failure occurred suddenly at low mileage without prior symptoms. Honda has not provided clear technical evidence demonstrating how a minor overspeed event of this magnitude, occurring thousands of miles earlier, directly caused the engine failure. This raises concerns about premature engine failure, possible engine defects, and the reliability and durability of the Honda Civic Si 1.5T engine. It also raises concerns about manufacturers denying warranty coverage for failures without clear causal evidence. This failure resulted in loss of vehicle function and significant financial burden. The vehicle has been properly maintained and was operated under normal driving conditions. I am submitting this complaint because premature engine failure at such low mileage may indicate a defect affecting engine durability, safety, and reliability