BMW 5 Series E39 Engine Cooling System Water Hose Pipe Line 1740474

The BMW 5 E39 Engine Coolant Hose is an original part from the Hoses, Pipes & Tubes group, designed for operation within the cooling fluid circuit. As a BMW part, it ensures proper coolant flow, stable system operation, and effective heat dissipation from the engine. A used OEM component is a sensible choice for cooling system service when you prioritize factory geometry and a precise fit for a specific engine version.

Specifications and technical data

• SKU: 1740474
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 1740474
• Substitutable numbers: 11531740474, 1740474, AS
• Category: Hoses, Lines & Pipes

Purpose and Function in the Cooling System

This hose is a component of the engine cooling system in the BMW 5 Series E39, responsible for directing coolant flow between individual sub-assemblies. A correctly selected hose ensures:

• maintenance of proper coolant flow in the designated circuit,
• stable operating temperature of the engine,
• reduced risk of engine and accessory overheating,
• a leak-proof connection to nipples and other system components.

Thanks to its original design, the hose maintains its correct shape under thermal and mechanical stress, which is crucial for long-term operation.

Construction and Fitment for BMW 5 E39

The coolant hose for the BMW 5 E39 has been designed with a specific routing in the engine bay in mind, taking into account its placement relative to other components. This means:

• factory support and routing points along original mountings,
• appropriately sized connection diameter for the cooling system nipples,
• geometry that minimizes stress and twisting of the hose during engine operation.

Such a precise fit reduces the risk of leaks, chafing, and collisions with other components in the engine bay, leading to more predictable and trouble-free operation.

Condition, Verification, and Operational Safety

The part is offered as a used BMW part, allowing for the preservation of factory fitment parameters while optimizing repair costs. Before installation, a standard visual inspection is recommended for any signs of operational wear, such as micro-cracks, deformations, or traces of mechanical intervention.

To further reduce the risk of selection errors, it is advisable to refer to the OEM part number and any interchangeable numbers assigned to this hose. Practical tips for checking component compatibility by numbers can be found in the guide Risk-Free Online Parts Shopping – 5 Proven Ways to Verify Component Compatibility by OEM Numbers and Paint Codes, which discusses, among other things, selecting parts for BMW.

Benefits of Using an Original BMW Hose

Using an original coolant hose in the BMW 5 E39 provides a number of practical service benefits:

• Factory Fitment – no need for modifications, cutting, or diameter adjustments, which shortens installation time.
• Compatibility with Other System Components – the hose works with original nipples, clamps, and housings, maintaining the manufacturer's designed sealing.
• Stable Cooling System Operation – proper coolant flow promotes uniform heat dissipation from the engine, which is important for the engine's longevity.
• Easier future diagnostics – the mechanic is dealing with a system built with parts that are consistent with BMW service documentation.

Cooling System Expansion and Related Parts

If you are planning a comprehensive repair or engine bay upgrade for your BMW and need other parts from the same group, such as additional coolant hoses, return hoses, or connecting pipes, check the available parts in the BMW Hoses, Pipes & Tubes category.

This approach allows for refreshing a larger portion of the cooling system in a single service session, reducing the risk of subsequent leaks and failures resulting from varying degrees of wear on individual components.