Haima Familia Water Temperature Sensor HB00-18-840 Engine coolant temperature monitoring Direct replacement

Haima HaoFeng Meilian water temperature sensor HB00-18-840 directly replaces factory number; fits all models in the range. Core function is real-time monitoring of coolant temperature and transmission to ECU to ensure precise fuel and ignition timing. Replacing resolves inaccurate temperature gauge, cold start difficulties, or rough idle, especially for older vehicles. If check engine light remains on, coolant gauge needle jumps, or hard starting when hot, sensor aging is indicated; replace promptly.