NHTSA Complaint #11706505 — 2017 KIA SPORTAGE

On 11/21/2025, while operating my vehicle, I experienced a critical engine failure. The engine failed a compression test, with readings as follows: Cylinder 1: 125 PSI Cylinder 2: 60 PSI Cylinder 3: 25 PSI Cylinder 4: 3 PSI As a result, the engine had no compression in multiple cylinders, preventing the vehicle from starting. The vehicle exhibited [smoke, stalling, or other observable symptoms]. This failure appears consistent with known issues in the Theta 2 GDI engines, including risk of engine failure or fire. I had not received notification of any required software updates or recalls relevant to this issue. Despite multiple attempts to resolve this with the dealer, including [dates of service attempts], the dealer refused to cover a replacement engine under warranty. Impact on Safety: The sudden engine failure rendered the vehicle inoperable and posed a significant safety risk due to the potential for stalling or fire while driving. Additional Notes: I am submitting this report to request that the NHTSA investigate this potential safety defect.