BMW 1 3 X1 Z4 Series E81 E87 E90 E91 Condensation water outlet hose 6978819

BMW E81 E87 E90 Coolant Hose Water Pipe is an original cooling system component designed for 1 and 3 Series models, ensuring stable coolant flow within the factory-designed circuit. Thanks to its construction compliant with the BMW standard, the pipe guarantees a proper fit to spigots and mounts, as well as correct cooperation with other system components. A used OEM part is a sensible choice for servicing when you want to maintain the original geometry and flow characteristics.

Specifications and technical data

• SKU: 6978819
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6978819
• Substitutable numbers: 64119207092, 9207092, 64116978819, 64116929351, 6978819, 6929351
• Category: Other Interior Parts & Accessories

Purpose and Function in the Cooling System

The presented water cooling hose is responsible for safely directing the coolant between system components, which directly impacts maintaining the engine's proper operating temperature. The appropriately shaped hose route minimizes the risk of kinks, overly tight bends, and unwanted vibrations that could lead to leaks or restricted flow.

For BMW E81, E87, and E90 models, a correctly selected cooling hose is crucial for:

• maintaining stable engine temperature under various load conditions,
• ensuring proper fluid circulation within the radiator, heater core, and engine block,
• reducing the risk of overheating and secondary component damage.

Advantages of Using an Original BMW Hose

Using an original water cooling hose instead of an aftermarket replacement allows for maintaining the system's factory operating parameters. Precise matching of shape and diameter to the spigots and mounting brackets facilitates installation and reduces the risk of material stress. The original hose geometry has been developed considering the space in the engine bay, which limits the possibility of rubbing against other components and extends its service life.

A used OEM part is also a cost-effective solution while maintaining high quality of workmanship. In practice, this means:

• maintaining the hose's factory stiffness and flexibility within the intended operating range,
• compatibility with original clamps and connectors,
• a lower risk of installation problems compared to random aftermarket parts.

Interchangeable Numbers and Part Identification

The water cooling hose has an assigned OEM part number and a set of interchangeable numbers, which facilitates unambiguous identification in BMW catalogs and parts selection systems. This allows for precise verification of compatibility with a specific engine version and model year of the vehicle, as well as checking if a given reference was used as a substitute in different equipment configurations.

In practice, this means that when selecting a part, you can use both the main number and reference numbers to confirm compatibility with your BMW. This is particularly important for models where cooling system modifications were introduced during production.

Condition, Application, and Selection for Repair

The offered water cooling hose is listed under the Cladding, Decorative Strips, and Decorations category in the catalog, however, its actual function relates to the engine cooling system. A used component allows for economical repair in situations where the existing hose shows signs of wear, cracks, surface crazing, or leaks around the spigots.

When planning service work, it is worth paying attention to:

• the condition of the hose's outer surface (signs of abrasion, cracks, deformation),
• the quality of the edges at the spigots and connectors,
• the correct positioning of the hose after installation relative to other components in the engine bay.

If you are considering whether a reconditioned part or a used original part would be a better choice, the article describing the differences between these solutions may be helpful – you can find it here: Reconditioned or Used Original – Which Part to Choose for Repair?.

Expanding BMW System Modernization

If you are planning a comprehensive repair or modernization of the interior and trim area in your BMW and need other parts from the same group, such as covers, overlays, or additional trim strips, check the available parts in the BMW Cladding, Decorative Strips, and Decorations category.

Selecting a water cooling hose in conjunction with other service components allows for restoring the engine's correct operating conditions and the aesthetics of the engine bay, which is important for both usability and subsequent vehicle resale.