BMW F80 M3 F82 F83 M4 S55 Petrol Engine Turbocharger Cylinders 4-6 7850279

The BMW F80 M3 F82 F83 M4 S55 Engine Turbocharger Cylinders 4-6 is an original turbocharger from the BMW M segment, designed for the petrol-powered S55 engine. This component comes from a disassembly, making it an attractive solution for informed users looking for a factory component with proven performance characteristics.

Specifications and technical data

• SKU: 7850279
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7849651
• Substitutable numbers: 7849651, 11657849651, 7850279, 11657850279
• Fuel type: Petrol
• Category: Turbos & Parts

Purpose and technical characteristics

This turbocharger covers the 4-6 cylinder range of the S55 engine used in the BMW F80 M3 and F82/F83 M4 models. It is an OEM turbocharger and parts design, specifically designed to work with the high power density gasoline engine typical of the M series.

Factory matching to the S55 engine ensures the stock boost characteristics are maintained, the engine management system works correctly, and the exhaust and airflow parameters are optimized. This allows the turbocharger to maintain stable boost pressure, appropriate throttle response, and predictable thermal loads under dynamic track and road driving conditions.

Benefits of using an original BMW turbocharger

Choosing an original turbocharger for the S55 engine brings a number of practical advantages over replacements:

• Full installation compatibility – retaining factory mounting points, oil and cooling connections, and exhaust system geometry.
• Consistency with the engine control unit software – no need to modify the boost maps when replacing a worn component.
• Stable operating parameters – predictable behavior throughout the entire rev range, important for cars used in a sporty manner.
• Engine safety – proper boost pressure and exhaust gas flow reduce the risk of excessive load on the pistons, connecting rods and cooling system.

For M3 and M4 owners, maintaining the integrity of the entire turbocharger system is crucial. Using the factory turbocharger on cylinders 4-6 allows for even operation on both sides of the engine, which translates to refinement, performance, and durability.

Status, verification and use in the service

The turbocharger offered is a used component, sourced from the dismantling of an original BMW vehicle. This type of component is particularly interesting for:

• specialized BMW M services,
• workshops dealing with the regeneration and diagnostics of charging systems,
• users looking for a cost-effective solution while retaining OEM parts.

Before installation, standard workshop procedures are recommended: checking clearances, leaks, and the condition of the rotor and housing, as well as thoroughly flushing the oil lines and verifying the lubrication system. A properly prepared and installed turbocharger allows you to restore full efficiency to the S55 engine's supercharging system without the need to modify the control software.

Application in modifications and performance projects

The S55 engine in the BMW F80 M3 and F82/F83 M4 is often the basis for high-performance projects. The used OEM turbocharger on cylinders 4-6 can be used both as a replacement in the stock configuration and as a basis for further modifications (e.g., hybridization in specialized facilities). Maintaining the original geometry and housing facilitates integration with the stock manifold, intercooler, and exhaust system.

If you're interested in the broader context of tuning turbocharged engines in sports cars, it's worth checking out the material comparing various solutions in the MINI Cooper S – you'll find it in the article Go-Kart Feeling XXL: Used N18 vs. B48 Turbocharger – Which to Choose for the Mini Cooper S? Although it covers a different model, it provides a good overview of the approach to selecting used OEM turbochargers in performance projects.

Related Products and Technical Knowledge

If you're looking for other turbochargers designed for BMW models, check out our BMW turbochargers category, where you'll find a wide selection of OEM components for various BMW engines. This allows you to select turbocharger components that are consistent in design and purpose.

For those interested in a broader look at the use of used parts in sports cars and hot hatches, we also recommend the blog article MINI John Cooper Works – what makes it special and how to improve your MINI?, which discusses the practical aspects of upgrading using original components from higher-end models.