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The Gates molded bypass heater hose for 2007-2009 Mazda3 with the 2.3L 4-cylinder is a vehicle-specific molded replacement used in the bypass circuit. It provides the routed bypass connection required in that portion of the cooling system and is intended for use when servicing bypass plumbing or replacing worn heater hoses on these Mazda3 applications.
Gates 07-09 Mazda 3 4-Cyl. 2.3L By Pass Molded Heater Hose