BMW F80 M3 F82 F83 M4 S55 Petrol Engine Turbocharger Housing Cover Part 7850279

BMW F80 M3 / F82 F83 M4 S55 Petrol Turbocharger for cylinders 4-6 is an original boost system component, specifically designed for the S55 performance engines. With precise fitting to the petrol engine, it ensures stable boost pressure, correct power characteristics, and predictable vehicle behavior across the entire RPM range. This solution is dedicated to drivers and workshops that prioritize factory compatibility, reliable installation, and maintaining original operating parameters.

Specifications and technical data

• SKU: 7850279-2
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7850279
• Substitutable numbers: 7850279, 11657850279, MFD49335-02053
• Fuel type: Petrol
• Category: Turbos & Parts

Intended Use and Compatibility with S55 Engine

The presented turbocharger operates within the boost system of the S55 petrol engine used in the BMW F80 M3 and BMW F82/F83 M4 models, covering cylinders 4-6. This means it is designed to work with the factory engine configuration without the need for modifications to manifolds, lines, or control systems.

Such a fit allows for maintaining the original power delivery characteristics, appropriate throttle response, and correct interaction with the factory engine control unit software. For workshops, this translates to predictable installation times, and for users – stable and repeatable boost system operation.

Technical Specifications of the Petrol Turbocharger

As a component in the Turbochargers and Parts category, this boost unit has been designed to operate under the demanding thermal conditions typical of high-performance petrol engines. The construction is adapted for:

• high exhaust gas temperatures generated by the S55 unit,
• dynamic load changes during track and road driving,
• precise boost pressure regulation by the factory control system.

The turbocharger system works with the petrol fuel system, therefore the channel geometry, material selection, and operating parameters are optimized for petrol-type fuel, which translates to appropriate durability and predictable long-term performance.

Condition, Origin, and Benefits of Using OEM Parts

The offered turbocharger is an original BMW part in used condition, which in practice means maintaining the factory structural specifications while optimizing repair costs. For professional service centers and informed users, this is an attractive alternative to aftermarket parts of unknown origin, especially for high-performance engines like the S55.

Using an original turbocharger allows for:

• maintaining compliance with factory engine operating parameters,
• minimizing the risk of mechanical and electronic fitting issues,
• reducing vehicle downtime through installation that is close to plug-and-play.

Application in Service and OEM+ Tuning

This turbocharger is suitable for both standard replacement of a worn-out component and for OEM+ projects where the priority is to maintain the original powertrain architecture while enhancing reliability. Replacing a worn boost unit with a functional OEM part allows for restoring correct boost pressure, reducing the risk of overheating, and improving engine smoothness across the entire RPM range.

For workshops specializing in BMW M, this is a component that enables repairs compliant with factory standards, and for the user – safely restoring full boost system functionality without experimenting with uncertain aftermarket alternatives.

Expanding the Boost System and Selecting Other Components

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 additional turbochargers, oil lines, or mounting parts, check the available parts in the BMW Turbochargers and Parts category.

When selecting used boost system components – especially for demanding petrol engines – it is advisable to refer to OEM numbers and compatibility with the specific engine version. Detailed guidance on safely choosing such components can be found in the Global Parts guide: Safe Online Purchase of Used Car Parts – A Step-by-Step Guide, which covers topics such as selection by part numbers, seller verification, and practical examples for workshops and individual users.