BMW F90 M5 F91 M8 S63M Cyl. 1-4 Return Pipe Turbocharger Oil Line 7852375

The BMW F90 M5 F91 M8 S63M Cyl 1-4 Turbocharger Oil Hose is a specialized turbocharger and parts component designed for the turbocharging system in BMW diesel engines. It enables proper oil supply to the turbocharger serving cylinders 1-4, which is crucial for the durability and stable operation of the entire turbocharging system.

Specifications and technical data

• SKU: 7852375
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7852375
• Substitutable numbers: 7852375, 11427852375
• Fuel type: Diesel
• Category: Turbos & Parts

Purpose and role in the charging system

The turbine oil line provides a controlled flow of lubricating and cooling oil to the turbocharger serving the first cylinder section of the S63M engine. Stable pressure and adequate oil flow reduce the risk of bearing overheating, reduce friction, and support the smooth operation of the rotor at the high rpms characteristic of BMW M engines.

In turbocharged diesel engines, such as advanced BMW designs, a functioning oil line is essential for:

• maintaining proper lubrication of rotating elements in the turbocharger,
• stabilization of operating temperature under heavy load,
• reducing wear of key components of the charging system.

Compatibility with BMW M units

This component was designed for use in BMW's sporty M models, where the turbocharger operates under significant load. The hose design is adapted to the specific oil routing in the S63M engine and the operating characteristics of the turbocharger serving cylinders 1-4.

Selecting the correct oil line is particularly important in high-powered vehicles because:

• ensures compliance with the factory geometry of the wiring in the engine compartment,
• minimizes the risk of leaks and oil pressure drops,
• supports stable operation of the turbocharger during dynamic driving.

Product characteristics and condition

This turbocharger oil line comes from BMW and is part of their Turbochargers and Parts category. The product is in used condition, allowing for cost-effective replacement while maintaining factory specifications. A used oil line can be a good solution if your existing component is showing signs of wear, corrosion, or leaks.

By choosing this cable you gain:

• component adapted to the oil system in the S63M engine,
• solution consistent with the BMW design for cylinders 1–4,
• the ability to restore proper turbocharger lubrication without the need to use substitutes with uncertain specifications.

Importance for turbocharger durability

A functioning turbine oil line directly impacts the lifespan of the turbocharger and the operational safety of the engine. A properly selected component helps reduce the risk of:

• overheating of turbocharger bearings,
• drop in oil pressure in the system,
• premature wear of supercharging components.

In BMW diesel engines, where the turbocharger operates over a wide load range, correct oil flow is one of the key conditions for maintaining stable performance and reducing costly breakdowns.

More about BMW M components and alternatives in this category

If you want to better understand the differences between the components used in BMW M versions and standard components, it is worth reading the article describing the characteristics of sports components, their design and the purpose of using parts used in these models: BMW M Performance – what are the differences between BMW M components and standard ones ?

If you're looking for other hoses, oil supply components, or components in the BMW turbocharger and parts category, check out the available products in the dedicated section: BMW turbochargers and parts . Additionally, if you're considering purchasing aftermarket components, you'll find practical tips on selecting and using such products in the guide: Used Parts – A Guide to Profitable and Safe Purchases .