Looking for a GENUINE Lexus Neutral Start Switch 84540-30270 with exact specifications and verified OEM compatibility? This neutral start switch is designed specifically for select Lexus models including LX450, LX470, SC300, SC400, SC430, and LS400, ensuring reliable starter engagement, accurate gear position recognition, and proper transmission safety operation.

The neutral start switch (PNP switch) plays a critical role in the vehicle’s starting and transmission system by allowing the engine to start only when the transmission is in Park or Neutral. Engineered to Lexus OEM standards, this genuine component ensures precise electrical signalling between the transmission and engine control systems, supporting safe and consistent vehicle operation.

Customers typically replace the Lexus neutral start switch when experiencing issues such as no-start conditions, intermittent starting problems, inability to start in Park or Neutral, incorrect gear indicator readings, or transmission-related warning lights. Using the correct OEM part number (84540-30270) is essential to restore proper functionality and avoid electrical or transmission system faults.

This switch is a direct-fit, genuine OEM replacement, ensuring seamless installation and factory-level performance for compatible Lexus vehicles. Accurate specification matching guarantees correct connector fitment, reliable signal transmission, and long-term durability under normal driving conditions.

Installing an incorrect or non-compatible neutral start switch can result in starting failures, transmission safety issues, fault codes, and premature electrical wear. Selecting the genuine Lexus part ensures dependable operation and peace of mind.

Before purchasing, always verify the vehicle model (Lexus LX450 / LX470 / SC300 / SC400 / SC430 / LS400) and part number (84540-30270) to ensure precise fitment, proper function, and long-term reliability you can trust.