Coolant Hose BMW F80 M3 F82 M4 S55 Water Pump Cooling Pipe Line 7848500

Coolant Hose BMW F80 M3 F82 M4 S55 Water Pump Cooling Pipe Line is a cooling system component designed for S55 petrol engines in BMW M-series sports models. Engineered as part of the original installation, it ensures stable coolant flow and supports efficient heat dissipation from the power unit. Thanks to a design tailored to the specific generation of M3 and M4, the hose helps maintain the factory routing geometry and the proper operation of the entire system.

Specifications and technical data

• SKU: 7848500-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7848500
• Substitutable numbers: 7848500, 11537848500
• Fuel type: Petrol
• Category: Coolant Hoses

Purpose and function in the cooling system

The S55 engine features an extensive cooling system where pipes and hoses are responsible for precisely directing fluid flow between the engine block, radiator, and other components. The hose described operates in a high-temperature and variable-pressure environment, which is why its correct fit is crucial for the stable operating temperature of the petrol unit. The appropriate flexibility and shape of the hose reduce the risk of kinks, leaks, and localized overheating.

Benefits of using an original BMW hose

Choosing a component from the Cooling system pipes and hoses group dedicated to specific BMW models allows for maintaining the factory installation routing and compatibility with other components. The original hose geometry facilitates installation in the engine bay, minimizes stress on ports and connectors, and promotes even temperature distribution in the circuit. For the S55 petrol unit, this is particularly important during dynamic driving, when the cooling system operates under increased load.

Using a hose that complies with factory specifications also supports proper interaction with temperature sensors and electronic controls, which translates into repeatable engine performance parameters and reduces the risk of failures resulting from overheating.

Technical and installation aspects

The coolant hose designed for the S55 petrol unit in the BMW F80 M3 and F82 M4 is engineered to work in a demanding thermal environment. The hose design accounts for:

• a properly selected inner diameter to ensure correct fluid flow,
• a shape adapted to the layout of components in the engine bay,
• operation within temperature ranges typical for high-revving petrol engines.

As a result, installation can be carried out in an organized manner, maintaining original mounting points and hose routing. In practice, this facilitates service, reduces replacement time, and helps maintain a clear and orderly cooling system layout.

Operation in the S55 petrol engine

The S55 petrol engine in M3 and M4 models generates high thermal loads, especially during track driving or intensive road use. A functional coolant hose is one of the elements that allow for maintaining a stable fluid temperature, thereby protecting the power unit from the effects of overheating. Regular inspection of the hoses and their replacement in case of wear or damage is a simple method to extend the service life of the entire cooling system.

More about the impact of temperature on the cooling system and how to rationally use cooling components can be found in the guide Summer heat vs. cooling system: used radiators and fans as a guarantee of savings, which discusses practical aspects of operation in high temperatures.

Complementary BMW cooling system components

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

To better ensure the durability of installed components, it is also worth checking out practical tips regarding the use of dismantled parts in the article How to extend the service life of used car parts, which describes maintenance and inspection methods for components used in daily driving.