2016 Kia Cadenza Electrical System Problems

I am submitting this complaint regarding a 2016 Kia Cadenza (VIN: [XXX] ) and Kia’s repeated failure to properly diagnose or repair a serious overheating/safety defect despite this being a well-documented and known issue affecting these engines. Vehicle and Service Information •Vehicle: 2016 Kia Cadenza (VIN: [XXX] ) •Mileage: ~129,608 •Dealer Involved: Central Kia of Plano (Plano, TX) •Repair Order #: [XXX] •Dates: [XXX] Issues 1.Overheating / Known Engine Defect •My vehicle overheats, especially with the A/C on or at idle. •Kia has already been directed to issue extended warranties on these engines due to systemic defects (including bearing wear, engine failure, and overheating). •Despite this, Kia continues to deny or delay proper repairs and instead authorized the dealer to replace only a cooling fan relay, which did not fix the defect. 2.Dealer Misconduct •Central Kia of Plano kept my vehicle for 10 days, charged me $269.92, and returned the vehicle still overheating. •I was told a Techline case would be submitted, but I have confirmed this was never done. 3.Incomplete Recall Repairs •I requested completion of open recalls: •SC232 – Windshield Bonding •SC284VG – HECU Fire Risk •The dealer marked one as complete and the other as pending, but I have no confirmation in Kia’s system that either was properly completed. 4.Corporate Inaction •I have multiple open cases with Kia Corporate, but they have failed to escalate or reassign me to a reputable dealer. •Despite the extended warranty obligation, Kia has not replaced the engine or confirmed a permanent repair. Why I Am Contacting NHTSA •This is not an isolated issue — it is a known safety defect across these engines. •Kia has been required to extend warranties for this exact defect but is failing to honor that coverage by stalling, misdiagnosing, and leaving vehicles unsafe. •My vehicle remains unsafe to drive INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)