Rein Automotive pressure sensors are made to factory specifications ensuring proper fit, form and function. A working pressure sensor is used to monitor the particle filter. The sensor alerts that the particle filter is starting to get clogged due to carbon build up. A build up in the exhaust can cause excessive back pressure damaging engine components. Rein pressure sensors are constructed from materials that meet factory OE requirements. Our quality pressure sensors filters aim to provide the professional repair technician and vehicle owner the peace of mind and trust that is expected from an OE component.