福美来1.8原装位凸轮轴位置传感器，HOP N3A1-18-221A 直接替换不修改

When your FOMi 1.8/Van model experiences starting difficulty, unstable idle, weak acceleration, or engine warning light on, it is likely the camshaft position sensor aging or failure, causing ECU to lose accurate timing signals. This sensor monitors camshaft speed/position and transmits signals to the engine control unit to precisely control ignition and fuel timing for smooth operation. This is an OEM replacement with part number N3A1-18-221A (N3A1-18) for Femai 1.8; direct replacement with no modification. Installation: disconnect battery negative, ensure proper clearance between sensor and cam gear to avoid signal interference.