NHTSA Complaint #11518903 — 2017 HYUNDAI SONATA

Hyundai has an active recall and open service bulletins for an ongoing issue with Knock Sensors in 2017 Sonatas (my vehicle is a 2017 Hyundai Sonata Sport). Over the last 18 months... the vehicle has been in for service 6 times... 4 in the last 6 weeks... due to ongoing issues with the knock sensor causing the vehicle to go into "limp mode" and causing the vehicle to decrease speed to a max of 60mph. There is no pre-warning for when the sensor will trip and cause the issues... which means if a vehicle is on a highway traveling at a speed of 70mph or more, and the sensor trips... the vehicle will decrease speed down to 60mph maximum. The protocol I am aware of for the repairs... was a first step software update... 2nd step replacement of the sensor... 3rd step replacement of the engine. In 6 attempts to remedy the issue... Hyundai has refused to authorize the appropriate steps to complete the repairs and replace the engine, causing my vehicle to become a hazard on the highways without warning to myself as the driver, or other vehicles on the roadway. **Note, the most recent occurrence of this was 4/22/23.**