Coolant Water Hose BMW G01 G05 30dX 40dX B57 Pipe Line Radiator Cooler 8577057

Coolant Water Hose BMW G01 G05 30dX 40dX B57 Pipe Line Radiator Cooler is an original cooling system component designed for BMW X3 G01 and X5 G05 diesel engines. As part of the Cooling system pipes and hoses group, it ensures proper coolant flow between the radiator and other components, which translates into a stable operating temperature for the power unit.

Specifications and technical data

• SKU: 8577057
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8577057
• Substitutable numbers: 8577057, 17128577057
• Fuel type: Diesel
• Category: Coolant Hoses

Purpose and function in the cooling system

This hose is designed to work with the B57 diesel engine in 30dX and 40dX versions, where it is responsible for efficient coolant discharge and supply between the radiator and other system elements. A properly selected hose minimizes the risk of overheating, leaks, and cooling performance drops, which directly impacts the durability of the engine and its accessories.

The original design of the hose guarantees a perfect fit to factory connectors, proper routing in the engine bay, and maintenance of the required bending radii without unwanted stress on adjacent components.

Construction and fitment for BMW G01 / G05

The coolant hose for the BMW X3 G01 and X5 G05 with a diesel engine is made of materials resistant to the operating temperatures of the cooling system and typical operational loads in diesel units. The hose profile is adapted to the geometry of the engine bay, which facilitates installation and reduces the risk of rubbing against other components.

The factory hose ends are prepared to work with original connectors and clamps, allowing the component to be integrated into the existing system without the need for modifications. This solution promotes long-term leak-tightness and stable cooling system performance.

Benefits of using an original hose

Using an original coolant hose in a B57 diesel engine provides a number of practical benefits:

• secure fit to the factory BMW G01 and G05 cooling system,
• maintenance of the coolant flow path designed by the manufacturer,
• reduced risk of leaks resulting from poorly fitted aftermarket replacements,
• stable system operation under high-load conditions typical for diesel units.

Thanks to this, the hose is a functional service solution for repairs, preventive maintenance, or cooling system upgrades in BMW vehicles with diesel engines.

Component condition and service application

The offered hose comes from disassembly and is a used part, which allows for lower repair costs while maintaining the manufacturer's original specifications. This type of solution is particularly beneficial for comprehensive cooling system maintenance when several components are replaced simultaneously, and the priority is to combine proper functionality with a reasonable budget.

Before installation, it is recommended to perform a standard check of connection tightness and the condition of cooperating cooling system components to fully utilize the potential of this hose in daily vehicle operation.

Technical support and additional materials

During the summer, the cooling system in a diesel engine operates under particularly demanding conditions. To better plan your service and select the right components, it is worth checking out the guide describing the impact of high temperatures on engine cooling and the savings potential of using parts from disassembly – you can find it in the article "Summer heat vs. cooling system: used radiators and fans as a guarantee of savings".

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