Review on 🚗 Pack of 4 NewYall TPMS Tire Pressure Sensor Set by Stanley Redline

I installed them on a Ford E350 that requires 55psi front and 80psi rear. Despite being synced to the system to clear the TPMS error message, 2 sensors show low pressure. The 2 front gauges work fine but the 2 rear gauges read 17psi. So either I got two unexploded parts and accidentally put them in the back, or they don't work under high pressure.