New factory Mazda OEM engine coolant water thermostat housing gasket for NA and NB Mazda Miata. This is the gasket that goes between the thermostat and the thermostat housing. This gasket is also used between the coolant sensor housing and the back of the cylinder head. Part number B621-15-173. Fits 1990-2005. Sold individually as one gasket.
California Residents: Prop 65 WARNING: This product MAY contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling. For more information, visit www.P65Warnings.ca.gov
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