Coolant Temperature Sensor 37875 Replaces 12551708 - Engineered and tested to provide years of trouble-free operation. Backed by over 50 years of mobile a/c experience. - Features: Brass construction for accurate temperature sensing; High-quality, direct-fit OE replacement. - OEM / Interchange Numbers: 12551708 - Specifications: Connector Gender: Female; Connector Shape: Round; Material: Brass; Thread Size: M16 x 1.5; Number of Terminals: 3.