Crankcase (pcv) problems of the 2021 Kia Motor Sorento

Component: 2. 5l t-gdi engine failed completely at 102,971 miles, requiring full replacement (~$8,000). Vehicle available for inspection at [xxx] kia, [xxx] . Safety risk: engine lost power during normal operation. Sudden, uncontrolled loss of engine power creates a direct collision risk at highway speeds for the driver, passengers, and surrounding vehicles. Confirmed by dealer: mark kia performed a borescope inspection on April 10, 2026 confirming cylinder wall scoring, oil-fouled pistons, and worn honing patterns across multiple cylinders. Findings are consistent with kia TSB eng235 (January 2022), which documents a defective pcv check valve on 2021–2022 Sorento 2. 5t engines allowing oil to contaminate combustion chambers. Vehicle was serviced exclusively at mark kia for all 17 visits since 2021. TSB eng235 does not appear in any service record. Prior symptoms: no warning lamps or messages before failure. A certified 36-point inspection one week prior showed zero cautions. Spark plugs replaced at 74,534 miles (Jan 2025) were found fouled at ~102,000 miles, only 28,000 miles later — indicating silent, progressive oil contamination. The defect is undetectable by the driver until catastrophic failure. Kia America has not responded to two formal written dispute requests (case #xxx, April–may 2026). Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).