Hyundai's KSDS (Knock Sensor Detection System) recall campaign covers Nu and Theta II engines with bearing wear that can lead to engine seizure. Multiple engine campaigns apply to specific production ranges — verify by VIN.
Run the VIN at nhtsa.gov/recalls to confirm all engine recall campaigns are complete. Listen for a metallic knock at idle — not to be confused with normal injector tick.
Est. cost: $0 under recall / $5,500–$8,500 engine replacement if seizure occurs
Source: NHTSA recall database + Hyundai KSDS campaign