Hitachi Automotive Systems, LTD Japan, is a global manufacturer and supplier of OE automotive products including; engine management systems, electric power train systems, drive control and information systems. Due to the numerous previous supersessions of older versions of this sensor, the replacement sensor may look slightly different from the sensor on the vehicle, and the installation orientation and connector may be in a somewhat different clock position. Nissan service info recommends replacing both cam and crank sensors at the same time to reduce comebacks. Depending on brand, some sensors may not include the o-ring. Order the o-ring separately if needed.