Duralast products are made to fit directly and are easy to install, as they're designed and tested to meet OE specifications. The A/C Pressure Sensor reports system pressures to the computer, which then controls the compressor, fans, and system levels efficiently. If the A/C Pressure Sensor doesn't work correctly, it will provide inaccurate readings to the computer, which severely affects the system's performance and function. Without accurate data from a functioning sensor, the computer can't protect the safety of critical components and the entire system. This can cause expensive damage to critical components and the system as a whole.