This water temperature sender with OEM numbers 87554838, C4AH10884A, 81784077 and 101612A is an ideal replacement for diesel engine parts. It precisely monitors engine coolant temperature and transmits real-time feedback signals to prevent overheating failures. Adopting fine sensing components and fully sealed construction, it runs steadily in harsh working environments. Made to standard OEM specifications, it provides excellent compatibility and durable performance for daily engine maintenance and aftermarket replacement.