BMW X3 E83 2.0i Cooling System Coolant Radiator Water Hose Pipe 3404070

BMW X3 E83 2.0i Cooling System Coolant Radiator Water Hose Pipe is an original component from the Cooling system hoses and pipes group, designed for operation in the coolant circuit of the 2.0i petrol engine in the BMW X3 E83 model. This used OEM part ensures factory-standard connection geometry, which facilitates installation and helps maintain the correct routing of the hose in the engine bay.

Specifications and technical data

• SKU: 3404070
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 3404070
• Substitutable numbers: 3404070, 17113404070
• Category: Coolant Hoses

Purpose and function in the cooling system

The cooling system hose in the BMW X3 E83 2.0i is responsible for the stable flow of liquid between system components, such as the radiator, engine block, or auxiliary circuit. A properly selected hose minimizes the risk of leaks, airlocks, and local overheating, which translates into safe operation of the power unit across a wide range of loads.

By maintaining the factory shape and connection diameters, this component allows for the maintenance of proper operating pressure in the system and facilitates bleeding after service. This is particularly important in petrol engines, where a stable operating temperature has a direct impact on performance and component durability.

Construction and fitment for the BMW X3 E83 2.0i

The hose has been designed specifically for the engine bay geometry of the BMW X3 E83 with the 2.0i unit, which means a precise fit to factory brackets, ports, and routings. The appropriately selected material flexibility limits the transfer of vibrations from the engine to the cooling system while ensuring stable hose positioning during operation.

Its original BMW origin promotes compatibility with other system elements, such as ports, clamps, or quick-connectors. As a result, the hose can be used as a replacement for a damaged part without the need for system modifications, which shortens service time and reduces the risk of installation errors.

Benefits of using an original hose

Using a cooling system hose dedicated to the BMW X3 E83 2.0i allows you to maintain system operating parameters at a level close to factory specifications. Key advantages include:

• maintaining proper coolant flow across the entire engine RPM range,
• reducing the risk of leaks thanks to matched connection diameters,
• stable hose routing in the engine bay, without uncontrolled kinks,
• easier diagnostics and service due to compliance with factory technical documentation.

For the user, this means more predictable cooling system behavior, a lower risk of overheating, and the possibility of planned maintenance instead of sudden, costly repairs.

Part condition and service application

The item comes from the used BMW parts segment, which allows for economical repair while maintaining the original design specifications. This type of hose is suitable both for replacing a damaged section of the installation and for broader service work related to the cooling system, such as replacing the radiator, thermostat, or water pump.

In workshop practice, a used cooling system hose for the BMW X3 E83 2.0i can be a good solution in situations where a combination of reasonable costs and maintaining the original installation routing and factory mounting points is a priority.

Related components and technical materials

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other elements from the same group, such as additional lines, return hoses, or sections connecting to the radiator, check out the available parts in the BMW cooling system hoses and pipes category.

When working on the cooling system, it is worth considering the impact of high external temperatures on the load of the entire system – you will find practical tips in the guide Summer heat vs. cooling system: used radiators and fans as a guarantee of savings, which will help you better plan your service and choose the right components from the secondary market.