BMW E90 E91 LCI N57 Hose Line Coolant Pump Expansion Tank 7805795

BMW E90 E91 LCI N57 Hose Line Coolant Pump Expansion Tank is an original cooling system component designed for BMW vehicles with the N57 diesel engine after the facelift. Thanks to its factory geometry and fitment, it ensures stable coolant flow and proper integration with other components. It is a practical solution for users who want to restore the efficiency of the cooling system without compromising on compatibility.

Specifications and technical data

• SKU: 7805795
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7805795
• Substitutable numbers: 17127805795, 7805795, AS
• Fuel type: Diesel
• Category: Hoses, Lines & Pipes

Purpose and function in the cooling system

The presented coolant hose is designed for BMW 3 Series E90 and E91 models after the facelift (LCI) with the N57 diesel engine. It is responsible for the precise routing of coolant between system components, which is crucial for maintaining a stable operating temperature of the engine. A properly selected coolant hose reduces the risk of overheating, leaks, and drops in cooling performance.

Construction and fitment for BMW E90/E91 LCI N57

The geometry of the hose is adapted to the factory routing in the engine bay, which facilitates installation and allows for maintaining the original cooling system layout. Properly shaped sections and connection diameters ensure a tight seal with the ports and other hoses. As a result, the component works well with stock BMW parts, without the need for modifications or additional adapters.

As a part from the Lines, hoses and pipes group, the product meets BMW factory equipment standards, which translates into predictable behavior under thermal and mechanical load. This is particularly important in diesel engines, where the cooling system operates under demanding conditions.

Benefits of using an original BMW hose

Using an original coolant hose in the N57 engine offers a number of practical advantages:

• maintaining the factory coolant routing,
• compatibility with stock clamps and connectors,
• reducing the risk of leaks resulting from poor-fitting aftermarket parts,
• stable cooling system operation under typical diesel engine operating conditions.

For users planning comprehensive cooling system maintenance or replacing several components at once, it is a good idea to check other components in the lines and pipes group. In such cases, it is worth checking the offer in the Lines, hoses and pipes category to select the remaining installation elements.

Application in the N57 diesel engine

The N57 engine is a modern diesel unit where the cooling system operates under significant thermal load. A properly selected coolant hose helps maintain a stable operating temperature, which affects engine refinement, fuel consumption, and component durability. Proper coolant flow is important both during calm driving and under higher load conditions, typical for diesel cars used on long-distance routes.

Condition and use in vehicle service

The item comes from disassembly and is intended for users and workshops looking for original BMW parts at a reasonable price. Such components work well for maintenance repairs when the priority is to maintain the vehicle's factory specifications. Choosing an original coolant hose helps reduce the risk of problems typical of low-quality replacements, such as deformation or premature material wear.

Summary

BMW E90 E91 LCI N57 Hose Line Coolant Pump Expansion Tank is a practical solution for drivers and workshops that want to restore the proper operation of the cooling system in BMW cars with a diesel engine. Its original origin, fitment for a specific generation and engine unit, and compliance with the factory installation routing make it a reasonable choice for repairs and cooling system inspections.