BMW 1 Series E81 E87 LCI N43 E90 E91 Ventilation Line Hose Radiator Top 7565092

BMW 1 Series E81 E87 LCI N43 E90 E91 Ventilation Line Hose Radiator Top is an original cooling system component from the Lines, hoses and pipes category, designed for BMW 1 Series and 3 Series petrol engines with the N43 unit. This used OEM part ensures a factory fit, stable coolant flow, and the maintenance of proper thermal parameters for the engine.

Specifications and technical data

• SKU: 7565092
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7565092
• Substitutable numbers: 17127565092, 7565092, 17127531757, 7531757, 17124558585, 4558585, EM
• Fuel type: Petrol
• Category: Hoses, Lines & Pipes

Purpose and function in the cooling system

The radiator ventilation line hose is responsible for the controlled flow of coolant between system components, such as the engine block, radiator, or return circuit. In the N43 petrol engine, proper coolant circulation is crucial for maintaining a stable operating temperature, protecting the cylinder head, and reducing the risk of overheating during dynamic driving.

The component was designed specifically for the BMW E87 LCI and E90 petrol configurations, which ensures correct routing in the engine bay, maintenance of appropriate bending radii, and collision-free placement relative to other sub-assemblies.

Advantages of using an original BMW hose

Using an original cooling hose instead of a worn or leaking component allows for the restoration of factory operating parameters. The most important benefits include:

• secure fit to the connectors and mounts in the N43 engine,
• properly selected internal diameter ensuring correct coolant flow,
• geometry consistent with factory routing in the engine bay,
• compatibility with equipment characteristic of the E87 LCI and E90 versions.

As a result, installation is predictable, without the need for modifications, and the cooling system regains its operational stability. This is particularly important in modern petrol units, where the operating temperature is precisely controlled by the engine management system.

Technical characteristics and compatibility

The hose has been developed for petrol-powered engines, meaning it is adapted to the specific thermal conditions and operating pressures of this unit. The hose construction accounts for:

• resistance to long-term contact with coolant,
• dimensional stability across a wide temperature range,
• maintenance of airtightness at typical cooling system operating pressures.

OEM markings and interchangeable numbers assigned to this model facilitate unambiguous part identification and the selection of the correct variant for a specific BMW configuration, which is especially important given the equipment and model year differences within the E87 LCI and E90 series.

Part condition and service application

The offered hose comes from dismantling and is classified as a used original BMW component. This type of part is a good solution in situations where the existing hose shows signs of aging, cracks, leaks, or deformations resulting from overheating. Replacing it with a functional OEM hose helps reduce the risk of coolant loss, pressure drops in the system, and failures related to engine overheating.

Due to its factory origin, the hose maintains compatibility with original clamps, brackets, and routing in the engine bay, which facilitates service work and reduces installation time.

Support with selection and additional information

OEM markings, interchangeable numbers, and identifiers are available in the product description and technical specifications to help verify the hose's compatibility with a specific version of the BMW 1 or 3 Series. In case of doubt, it is worth comparing the markings with the vehicle documentation or the numbers found on the removed part.

If you are planning a comprehensive repair or upgrade of the cooling system area in your BMW and need other elements from the same group, such as additional lines, flexible hoses, or rigid water pipes, check the available parts in the BMW lines, hoses and pipes category.

For users also considering the purchase of used control modules or other electronic components during major vehicle service, the following guide article may be helpful: The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?.