Standard Ignition ALS777 Tire Pressure Monitoring System (TPMS) Sensor - Front Left

Standard Ignition ALS777 TPMS Sensor

The Standard Ignition ALS777 is a wheel-mounted tire pressure monitoring system sensor for select Lexus and Toyota applications. It is built for front left placement and supports OEM relearn procedures on listed vehicles, making it a direct-fit service part for TPMS repairs.

• Wheel-mounted TPMS sensor for front left applications
• Bolt-mount design with 2 bolt holes
• Female connector with rectangular shape
• 2 blade terminals for vehicle connection
• No programming required on listed Toyota Highlander and Lexus RX330 applications
• Cross-references Standard Ignition ALS777 for the same application

Vehicle Fitment

• Fits 2007-2009 Lexus RX350, front left. Made in Japan.
• Fits 2006-2008 Lexus RX400h, front left.
• Fits 2004-2007 Toyota Highlander, front left.
• Fits 2004-2006 Lexus RX330, front left. Made in Japan.
• Fits 2004-2006 Toyota Highlander, front left. Install sensor and follow OEM factory relearn procedure, no programming required.
• Fits 2004-2005 Lexus RX330, front left. Built in Japan; no programming required. Install sensor and follow the OEM factory relearn procedure.

Product Details

Standard Ignition ALS777 is a TPMS sensor designed for wheel mounting in the front left position on select Lexus RX350, Lexus RX400h, Lexus RX330, and Toyota Highlander models. The bolt-mount construction, rectangular connector, female connector gender, and blade terminals align with the listed OE-style electrical and mounting requirements. For vehicles that specify it, the sensor installs without programming and follows the OEM factory relearn procedure.

This part cross-references Standard Ignition ALS777 for the same application.

Common TPMS Issues It Can Address

• TPMS warning light illuminated on the dash
• Faulty or unresponsive front left tire pressure sensor
• Incorrect tire pressure readings from the wheel sensor
• Sensor replacement after tire service or wheel repair
• Loss of TPMS communication on supported Lexus RX and Toyota Highlander applications

Installation Notes and Tips

Install the sensor at the wheel location specified for the vehicle and position listed above. On the Toyota Highlander and Lexus RX330 applications noted in the fitment data, follow the OEM factory relearn procedure after installation; no programming is required for those listings. Verify connector orientation, bolt-mount alignment, and sensor placement before tire inflation and final assembly.

Quality Assurance

Standard Ignition supplies OE-style replacement electrical and sensor components for service applications. ALS777 is built to match the listed mounting and connector requirements for the covered Lexus and Toyota vehicles.