TPMS or Tire Pressure Monitoring System is fitted to Nissan and Infiniti cars to monitor tire pressures and provide a warning to the driver if low pressure on any of the four tires is detected. These units have an internal battery that wears down over time and may show a constant TPMS illumination on the gauge cluster regardless of tire pressures. These units are non-servicable and require replacement when failed.
NOTE: Professional installation of these TPMS Sensors is required for full function. These sensors require special tools to program the TPMS ID before they can communicate with your cars ECU.
Nissan Technical Service Bulletin NTB08-033c - TPMS Monitering