BMW 3 Series E90 LCI Hose Radiator Bottom Thermostat 7531780

BMW e90 petrol radiator hose pipe is a component from the Hoses, pipes and tubes category, designed for the cooling system in BMW cars with a petrol engine. The original design ensures proper coolant flow, stable engine operation, and safe heat dissipation under typical operating conditions.

Specifications and technical data

• SKU: 7531780
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7531780
• Substitutable numbers: 7531780, 17127531780
• Category: Hoses, Lines & Pipes

Purpose and function in the cooling system

The BMW e90 petrol radiator hose is responsible for transporting coolant between the radiator and other system components. A correctly selected and sealed hose minimizes the risk of engine overheating, supports stable operating temperature, and reduces thermal stress on other components.

This element is particularly important in cars used in city traffic, where frequent stops and changes in engine load cause the cooling system to work intensively. The appropriate shape and diameter of the hose allow for free fluid flow, which translates into predictable temperature behavior across the entire operating range of the petrol engine.

Construction and fit for BMW e90

The hose belongs to the group of elements designated as BMW OE, which means it is compatible with the factory geometry and mounting points in the BMW e90 body. This ensures a tidy installation without the need for modifications or additional adapters, and the hose is routed in the engine bay according to the manufacturer's specifications.

The appropriately selected material flexibility allows for compensation of engine vibrations and minor displacements of the powertrain relative to the body. At the same time, the hose's construction limits the risk of kinks and cross-sectional constrictions, which is crucial for maintaining proper coolant flow.

Part condition and practical aspects

The offered item is used, which allows for an economical replacement of a damaged or leaking hose while maintaining the original manufacturer's specifications. For many BMW e90 owners, this is a sensible service solution that restores the cooling system's functionality without resorting to aftermarket parts with uncertain parameters.

Replacing the radiator hose is a typical maintenance task in case of leaks, cracks, or signs of overheating. Using an original part from disassembly reduces the risk of fitting problems and also makes the mechanic's job easier due to the preserved factory lengths and shape.

Benefits of using an original BMW hose

• Factory fit – compatible with the BMW e90 petrol cooling system, no modifications required.
• Stable fluid flow – the correct cross-section and routing of the hose support efficient engine cooling.
• Economical repair – a used part allows for reduced service costs while maintaining original specifications.
• Mounting compatibility – the hose works with factory brackets and clamps in the engine bay.

Related components and further system expansion

If you are planning comprehensive maintenance of the cooling system in your BMW and want to select other components, such as additional hose sections, return hoses, or pipes connecting to the heater, check the available parts in the BMW Hoses, pipes and tubes category.

If you are planning more extensive repairs using parts from disassembly, it is worth familiarizing yourself with practical tips on selecting premium used components, which are described in the article Used Mercedes parts – original parts from disassembly, containing universal principles also useful for servicing other brands.