BMW F01 F02 F03 N74 Engine Water Pipe Coolant Hose Supply Line Petrol 7591098

BMW F01/F02/F03 N74 Engine Coolant Hose is an original cooling system component designed for gasoline engines, responsible for the stable supply of coolant. Designed by BMW, it ensures proper fluid flow within the N74 engine, which translates to a safe operating temperature and predictable engine behavior.

Specifications and technical data

• SKU: 7591098
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7591098
• Substitutable numbers: 7591098, 17127591098
• Fuel type: Petrol
• Part type: Hose
• Category: Coolant Hoses

Purpose and Function in the Cooling System

This coolant hose is part of the Cooling System Hoses and Pipes category, dedicated to the N74 engine in gasoline-powered BMW 7 Series models F01, F02, and F03. It is responsible for the stable supply of the cooling system with fluid, which is crucial for protecting the engine from overheating and localized temperature spikes.

A properly selected hose in this area of the cooling system allows for:

• maintaining uniform coolant flow within the N74 engine,
• preserving the designed thermal parameters of the gasoline engine,
• reducing the risk of damage to seals and aluminum components exposed to high temperatures.

Construction and Fit for BMW F01/F02/F03 N74

The original hose design was developed for specific routing within the BMW 7 Series engine bay, taking into account the geometry of the N74 unit and the placement of other components. Thanks to this, the hose:

• fits factory mounting points and brackets in the F01/F02/F03 body,
• maintains the correct bend radius, limiting material stress during engine operation,
• ensures collision-free routing relative to engine accessories and body components.

Such a precise fit is important not only for sealing but also for resistance to vibrations and temperature changes, which are significant in the N74 unit due to its power and operating characteristics.

Benefits of Using an Original Coolant Hose

Using an original coolant hose in a BMW cooling system with an N74 engine offers tangible operational benefits:

• maintaining factory cooling characteristics – the flow and hose diameters comply with BMW's design specifications,
• better compatibility with other system components (water pump, connectors, housings),
• reducing the risk of leaks resulting from imprecise fit of aftermarket replacements,
• stable gasoline engine operation across a wide range of loads and ambient temperatures.

This is particularly important for complex engine designs where proper cooling directly impacts the durability of mechanical components and accessories.

Condition, Application, and Installation Tips

This part is from BMW's offering and is intended for vehicles with the N74 gasoline engine. Before installation, standard service procedures are recommended: inspect sealing surfaces, check mating connectors, and replace coolant according to the vehicle manufacturer's recommendations. A correctly installed coolant hose supports trouble-free operation of the cooling system and helps maintain stable engine operating temperature.

If you want to better understand the impact of hoses and pipes on cooling efficiency, check out the article: Engine Cooling System – Overheating, Repair, and Used Radiators, which discusses practical aspects of diagnostics and operation of cooling systems in BMW cars and other brands.

Other BMW Cooling System Hoses and Pipes

If you are assembling the entire coolant flow path in your car and need other BMW cooling system hoses and pipes, check out our dedicated offer: BMW cooling system hoses and pipes. This will allow you to easily select other system components for a specific model and engine configuration.