NHTSA Complaint #11514216 — 2016 KIA SORENTO

My vehicle abruptly went into catastrophic engine failure 01/03/23. After diagnostics run by both a third party repair shop and a Kia dealership, we were informed that a knock sensor failure had led to the lack check engine light as the problem was evolving. This knock sensor is a known defect in Kia's product and has previously been labeled a "product improvement" issue. I was not notified of this product improvement recommendation and could therefore not reconcile it. I contacted Kia directly who state a letter was sent in December 2018 and June 2019; these communications were absolutely never received. This issue directly led to a serious safety event of the vehicle and therefore for my family. As a "product improvement" this known defect is not searchable through the NHTSA or Kia website for consumers awareness. This issue needs to be escalated to a product safety recall to prevent further serious safety events