BMW 1 3 Series E87 E90 E91 M47N2 Hose Cylinder Head-radiator Top Diesel 7805458

Description

BMW 1 3 Series E87 E90 E91 M47N2 Hose Cylinder Head-radiator Top is an original cooling system component from the Lines, hoses and pipes category, designed for BMW diesel engines from the M47N2 family. It ensures stable coolant flow between the radiator and other components, which translates into a safe operating temperature for the engine and predictable vehicle behavior in all conditions.

Specifications and technical data

• SKU: 7805458
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7805458
• Substitutable numbers: 17127805458, 7805458, 17124714092, 4714092, 17127789586, 7789586, AS
• Fuel type: Diesel
• Category: Hoses, Lines & Pipes

Purpose and function in the cooling system

The presented hose is dedicated to BMW 1 and 3 Series E87, E90, and E91 vehicles with the M47N2 diesel engine, where it is responsible for the efficient transport of coolant between the radiator and the thermal system components. A properly selected hose minimizes the risk of engine overheating, leaks, and pressure drops in the fluid circuit.

Thanks to its factory geometry and correctly selected diameter, the hose maintains proper flow, does not kink on bends, and works perfectly with original clamps and connectors. This is particularly important in diesel engines, where thermal loads are higher than in gasoline units.

Benefits of using an original BMW hose

Using an original water radiator hose in an M47N2 diesel engine allows you to maintain cooling system operating parameters in accordance with the manufacturer’s specifications. In practice, this means:

• stable engine operating temperature in both city and highway driving,
• reduced risk of failure resulting from overheating or loss of coolant,
• secure fitment to connectors and brackets in the engine bay,
• easier diagnostics and future service thanks to maintaining the original system configuration.

By choosing this component, you avoid problems typical of aftermarket replacements with imprecise geometry, such as material stress, rubbing against other components, or installation difficulties.

Condition, installation, and service application

The item comes from dismantling, which makes it an attractive cost-effective solution while maintaining the original BMW specification. It is a good solution both for standard replacement of a worn hose and for larger service work within the diesel engine cooling system, e.g., after replacing the radiator, thermostat, or water pump.

The hose is structurally prepared for installation in place of the factory component, without the need for modifications or adjustments. In practice, this means shorter mechanic labor time and a lower risk of leaks after the service is completed.

Part selection and compatibility

To correctly select the water radiator hose for your BMW, it is worth verifying compatibility with the specific body version and M47N2 diesel engine. Manufacturer markings and interchangeable numbers are helpful in this regard, allowing you to clearly confirm compatibility with a given vehicle. This minimizes the risk of purchasing an item of the wrong length or shape.

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other components from the same group, such as flexible fluid hoses, rigid guide pipes, or additional connecting sections, check the available parts in the BMW lines, hoses and pipes category.

Additional information and technical advice

When replacing the water radiator hose, it is recommended to simultaneously check the condition of the clamps, connectors, and the coolant itself. In diesel engines, it is especially important to bleed the system after installation to avoid local overheating and a decrease in cooling efficiency.

If you are considering a wider vehicle upgrade using dismantled components, it is worth reading practical tips on the safe selection of used parts – you will find them in the article Tuning with used parts – how to gain performance without spending a fortune, which discusses how to combine cost-effectiveness with reliability in daily operation.