The Standard Ignition NS 379 SI Neutral Safety Switch is engineered to ensure that a vehicle s engine starts only when the transmission is in the Park or Neutral position thereby preventing unintended vehicle movement This switch is a direct fit OE replacement ensuring proper fit form and function for a trouble free installation Constructed with high grade materials it meets the stringent demands of today s service professionals The NS 379 SI features copper alloy conductors that provide superior electrical conductivity with low resistive losses enhancing the reliability and longevity of the switch It undergoes 100 testing to verify both mechanical and electrical switching performance ensuring consistent and dependable operation Designed and manufactured to stringent quality standards at a certified facility the NS 379 SI offers a robust solution for maintaining vehicle safety and operational efficiency By replacing a faulty neutral safety switch with the NS 379 SI fleet operators can prevent potential engine start issues and reduce the risk of unintended vehicle movement thereby enhancing overall fleet safety and operational reliability