Coolant Hose 11537521049 For BMW N52 E65 E66 E60 E61 E90 E70 E83 E81 E87

The water pump bypass hose, also known as the thermostat bypass hose or coolant bypass hose, is an important component in a vehicle's cooling system. Its primary function is to connect the water pump to the thermostat housing, allowing for the proper circulation of coolant. The water pump bypass hose is typically made of durable materials such as rubber or silicone, ensuring flexibility, durability, and resistance to high temperatures and coolant chemicals.

The water pump bypass hose is designed to regulate the flow of coolant and maintain the optimal operating temperature of the engine. It plays a critical role in the cooling system by allowing coolant to bypass the closed thermostat and circulate directly from the water pump to the engine block. This helps to prevent overheating and ensures efficient cooling, especially during engine warm-up when the thermostat is closed.