Chang'an Xingyun 474 and SC460 HOP Camshaft Position Sensor 3781020-02 OEM Replacement

Chang’an Xingyun 474 series and SC460 models (2005-2012; engines 1.3L–1.6L) use HOP camshaft position sensor (OEM 3781020-02, part number HOPTW011). This sensor monitors camshaft position and provides ignition and fuel-injection timing signals to the ECU to ensure smooth operation. OEM numbers facilitate cross-checking with factory parts. Replacement difficulty is moderate; professional technician recommended; disconnect the battery negative and clean the mounting area before installation.