BMW E90 E90 LCI E91 E91 LCI E92 E92 LCI M57N2 Diesel Turbocharger Turbo 7796355

BMW E90 E90 LCI E91 E91 LCI E92 E92 LCI M57N2 Diesel Turbocharger 7796355 is an original turbocharger from the Turbochargers and Parts category, designed for BMW M57N2 diesel engines. This is a solution for users expecting stable boost parameters, correct torque characteristics, and the preservation of the engine's factory operating culture.

Specifications and technical data

• SKU: 7811404-9
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7811404
• Substitutable numbers: 11657811404, 7811404, 11657802588, 7802588, 7796355, 7 796 355
• Fuel type: Diesel
• Category: Turbos & Parts

Purpose and Compatibility

The presented turbocharger is designed to work with Diesel M57N2 engines installed in BMW 3 Series models: E90, E90 LCI, E91, E91 LCI, E92, and E92 LCI. The use of the correct boost unit in these constructions is crucial for maintaining adequate boost pressure, proper mixture combustion, and the vehicle's stock performance.

Technical Characteristics of the Turbocharger

As a component from the Turbochargers and Parts group, this model operates in the diesel engine's boost system, utilizing exhaust gas energy to compress intake air. The appropriately selected geometry of the impeller and housing allows for a favorable pressure build-up characteristic, which translates to good flexibility of the M57N2 unit across a wide RPM range.

The turbocharger works with the engine's lubrication and cooling system. Therefore, during installation, it is important to adhere to service procedures: check the oil line blockages, properly vent the system, and use oil with parameters consistent with the vehicle manufacturer's recommendations. A correctly selected and installed component can help reduce the risk of overheating, excessive impeller play, and power loss.

Application in the M57N2 Diesel Engine

M57N2 engines are well-established diesel units in BMW's lineup, where the turbocharger is responsible not only for increasing power but also for combustion efficiency and fuel consumption reduction. The use of the correct boost model:

• supports the maintenance of stable torque in the low and medium RPM range,
• allows for the preservation of stock engine control unit maps without the need for additional modifications,
• reduces the risk of errors in the boost control system and limp mode.

For users who drive their BMWs dynamically, a properly functioning turbocharger is important for consistent performance, smooth acceleration, and driving comfort on the road and in the city.

Condition, Origin, and Part Selection

The offered turbocharger is a used component, allowing for an economical restoration of the boost system's functionality compared to purchasing a brand-new unit. Choosing an original BMW component promotes proper fitment with the exhaust manifold, intake system, and engine accessories, and also facilitates installation in a workshop setting.

The component has a dedicated OEM part number and associated interchangeable numbers, which simplifies verifying compatibility with a specific engine version and body year. Before purchasing, it is recommended to compare the markings with the vehicle's documentation or consult a mechanic to ensure full compatibility with your specific BMW 3 Series model.

Installation and Operational Guidelines

When replacing a turbocharger in a diesel engine, it is worth paying attention to several key technical aspects:

• thorough cleaning of the intake system from any residue left by the previous, damaged turbocharger,
• replacement of engine oil and filter before the first start-up after installation,
• checking the tightness of vacuum lines and air hoses,
• verifying the correct operation of the boost control valve.

This approach reduces the risk of premature wear of the new boost component and helps maintain stable operating parameters of the M57N2 unit in the long term.

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

For those considering the purchase of salvaged components for service or tuning projects, practical tips on verifying the condition and selecting parts may be useful. You can find them in the article Buying Used Car Parts • Common Mistakes When Choosing Tuning Parts, which helps in consciously planning modifications and repairs.