BMW F20 F30 LCI Turbocharger Coolant Return Pipe Line B48 Petrol 7643226

The BMW F20N F30N B48 Turbo Turbine Cooling Hose/Pipe is an original component of the turbocharger cooling system in BMW petrol engines, designed to precisely route coolant to and from the turbocharger. A properly selected hose ensures stable operating conditions for the turbocharger, resulting in consistent performance and safe operation of the engine.

Specifications and technical data

• SKU: 7643226
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7643226
• Substitutable numbers: 7643226, 11537643226
• Fuel type: Petrol
• Category: Turbos & Parts

Purpose and function in the supercharging system

The turbocharger cooling line in the BMW F20N and F30N with the B48 engine is responsible for the controlled flow of coolant through the turbo housing. It stabilizes the turbocharger's operating temperature, reducing the risk of overheating, cavitation, and local thermal stresses in the bearing area.

Thanks to its proper shape and internal diameter, the hose maintains the appropriate flow rate, which supports the durability of the entire supercharging system and allows the factory operating parameters of the petrol engine to be maintained.

Construction, fitting and assembly

As a turbocharger and parts component, the hose is designed for specific BMW engines, maintaining the factory connection geometry. This means:

• reliable cable routing in the engine compartment, without tension and twisting,
• correct positioning in relation to the turbocharger and other cooling system components,
• maintaining the original mounting points and routing.

This adjustment facilitates installation and reduces the risk of leaks, which is particularly important in areas of high temperatures and variable thermal loads.

Technical and operational characteristics

The turbocharger cooling hose for the B48 petrol engine operates in a demanding environment, therefore its functional features are important:

• Temperature resistance – the hose design is adapted to work near the hot part of the turbocharger, which reduces the risk of deformation and leaks.
• Dimensional stability – maintaining the flow cross-section over the full temperature range supports uniform turbo cooling.
• Compatibility with the factory cooling system – the hose works with the original connectors and fittings, without the need for modifications.

A properly selected turbocharger cooling hose helps maintain the efficiency of the charging system, which has a direct impact on the dynamics, operating smoothness and service life of the petrol engine.

Condition, origin and service use

The offered component is used, making it an attractive service solution for users seeking genuine BMW components at a reasonable price. In practice, this allows for:

• restoring proper turbocharger cooling after a failure or leak,
• replacing a damaged or deformed cable with a factory equivalent,
• maintaining the consistency of the supercharging system with the original manufacturer's specifications.

Choosing the original turbo cooling hose is particularly important in supercharged petrol engines, where stable thermal conditions affect the durability of the turbocharger, seals and engine oil.

Technical support, eco-tuning and related products

If you're planning a turbocharger upgrade or comprehensive service, it's worth considering using used, original components as part of your eco-tuning strategy. Learn how to increase your car's performance while reducing your carbon footprint with recycled parts in the article "Eco-tuning in practice – how to improve performance using used parts ."

If you also need other turbocharger cooling hoses for this brand, check out our dedicated offer for turbochargers and parts for BMW to select compatible turbocharger components for your specific engine configuration.