BMW F80 M3 F82 F83 M4 S55 Engine Turbocharger Exhaust Manifold Cyl 4-6 7850279

The S55 gasoline engine turbocharger designed for BMW F80 M3 and BMW F82/F83 M4 models, serving cylinders 4-6, is a factory-original boost system component engineered for high-performance M-Power units. It offers a precise structural fit for the S55 engine, ensuring stable boost pressure and predictable engine behavior across a wide range of loads.

Specifications and technical data

• SKU: 7850279-3
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7850279
• Substitutable numbers: 7850279, 11657850279
• Fuel type: Petrol
• Category: Turbos & Parts

Application and Compatibility

The turbocharger presented is intended for the boost system of the S55 gasoline engine installed in BMW F80 M3 and BMW F82 and F83 M4 models. The component operates on cylinders 4-6, which is important for the configuration and diagnostics of the twin-turbo system in these models. Thanks to its construction conforming to factory BMW standards, the correct geometry of exhaust gas and intake air flow is maintained, as well as proper interaction with the engine control electronics.

Technical Characteristics and Role in the Boost System

The turbocharger from the Turbochargers and Parts category is responsible for compressing the air drawn into the gasoline engine, which allows for an increased amount of mixture in the combustion chambers, resulting in higher torque and better throttle response. In the S55 unit, used in the M3 and M4, a properly functioning boost module on cylinders 4-6 is crucial for:

• maintaining stable boost pressure during dynamic driving,
• uniform operation of both sections of the twin-turbo system,
• effective utilization of the gasoline engine's potential across the entire RPM range,
• preserving the factory performance parameters and driving refinement of the powertrain.

A properly selected turbocharger for a gasoline engine reduces the risk of overheating, power drops, and incorrect engine control unit operation, which is important for both daily use and track driving.

Benefits of Using an Original BMW Turbocharger

Using a component from the BMW brand means maintaining the factory boost system specifications without the need for adaptation or modifications. For the user, this translates to:

• certainty of fit with the S55 engine's exhaust and intake manifolds,
• proper cooperation with factory sensors and control accessories,
• consistency with engine control unit maps prepared for the M3/M4,
• maintaining the power delivery characteristics in line with the M division's design intent.

For advanced gasoline units like the S55, the use of the correct turbocharger directly impacts engine durability, operating temperature stability, and predictable response to load.

Condition, Verification, and Practical Application

The offered turbocharger is a used component, allowing for an economical repair or rebuild of the boost system in the BMW M3/M4 while maintaining factory specifications. This type of component is particularly useful for:

• replacing a damaged turbocharger on cylinders 4-6 after mechanical failure or overheating,
• comprehensive rebuilding of the S55 engine after modifications or intensive use,
• restoring the factory configuration after unsuccessful tuning modifications.

The S55 gasoline engine is sensitive to the quality of boost system components, therefore selecting the correct turbocharger is important for both performance and operational safety.

Boost System Expansion and Related Components

If you are planning a comprehensive repair or engine area upgrade for your BMW and need other parts from the same group, such as turbine housings, control actuators, or hot-side components, check the available parts in the BMW Turbochargers and Parts category.

When choosing a used boost system component, it is advisable to approach the topic of quality and durability consciously. To better understand the specifics of the secondary market and to dispel the most common doubts regarding used parts, read the article “Used Car Parts: Myths and Facts You Need to Know”, which practically discusses the advantages and limitations of such solutions.

If you are interested in combining high performance with a more conscious approach to the environment, it is also worth reading about how using recycled components can fit into a modern tuning approach – you can find more on this topic in the article “Eco-Tuning in Practice: How to Increase Performance While Reducing Your Carbon Footprint with Recycled Parts”.