Genuine OEM Toyota water bypass hose, part number 1626436040. This hose is part of the engine cooling system, responsible for circulating coolant through the bypass passages. It ensures proper engine temperature regulation, especially during warm-up. Located within the engine bay, connecting various coolant ports. Constructed from high-quality, heat-resistant rubber to withstand engine operating conditions. Genuine OEM hoses are designed for precise fitment and optimal coolant flow, ensuring reliable engine cooling.