NHTSA Complaint #11674087 — 2017 KIA SOUL

The issue involves the engine’s piston rings, which appear to be malfunctioning and causing excessive oil consumption. This has led to oil entering the combustion chamber and likely damaging the catalytic converter. The engine began consuming oil rapidly between oil changes — far more than normal — and has since developed engine knocking and performance issues. These symptoms are consistent with piston ring failure in other 2017 Kia Soul models that have been recalled, though my VIN is not currently included. • Component or system that failed: The likely failure is with the piston rings, which are allowing oil to burn inside the engine. This has begun to impact the catalytic converter as well. All parts remain installed and are available for inspection upon request. • Safety risks: This situation puts my safety and the safety of others at risk, as the engine could seize or stall unexpectedly due to low oil levels or catalytic converter failure. Excessive oil burning also increases the risk of internal engine fire and significantly affects emissions. • Has it been reproduced or confirmed? Yes. The issue has been confirmed by an independent mechanic, who documented abnormal oil loss, engine knocking, and suspected damage to the emissions system. • Has it been inspected by others? The vehicle has not been inspected by Kia, law enforcement, or insurance, but has been examined by a certified independent technician who suspects piston ring failure. • Warning lamps or symptoms: Yes. The check engine light came on, and engine performance began to decline. I also noticed knocking sounds and sluggish acceleration. These symptoms started a few months ago and progressively worsened. The oil was being consumed rapidly even though no visible leaks were found. • Assessment of incident and cause: Based on mechanic feedback and my experience, this appears to be a case of premature piston ring failure, which is causing oil to burn internally and is likely leading to catalytic damage.