BMW E90 E91 E92 E93 325d 330d M57N2 Turbo Charger Upper Cover 7796311 7796312

BMW E90 E91 E92 E93 325d 330d M57N2 Turbo Charger Upper Cover is an original component from the Turbochargers and parts group, designed for BMW diesel units of the E9x 3 series generation. This is a solution for users who want to maintain the factory performance characteristics of the boost system and ensure the integrity of the entire engine auxiliary equipment.

Specifications and technical data

• SKU: 7796311-2
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7796311
• Substitutable numbers: 11657796312, 7796312, 7796311
• Category: Turbos & Parts

Purpose and function of the turbo charger cover

The Turbo Charger Upper Cover in M57N2 engines plays a vital role in protecting the rotor components and guiding airflow within the boost system. Properly selected geometry and fitment to the turbine housing help maintain stable flow parameters, which translates into predictable throttle response and correct cooperation with the factory engine control unit.

Using a component from the BMW range allows for compliance with factory assembly tolerances, which is particularly important when operating under high loads and temperatures typical for 325d and 330d engines.

Benefits of using an original BMW cover

Choosing an original turbo charger cover from the Turbochargers and parts group ensures:

• consistency with the factory design of the turbocharger used in M57N2 engines,
• proper fitment to existing auxiliary equipment and mounts in the engine bay,
• preservation of the stock boost system performance parameters,
• the ability to use existing mounting points without modifications.

Thanks to this, the cover is suitable both for standard replacement of a worn-out part and for repairs of the boost system following a turbocharger failure.

Product characteristics and fitment

The presented cover comes from the BMW range, which means compliance with the factory specification used in the E90, E91, and E92 series with 325d and 330d M57N2 engines. The product has an assigned OEM part number and related interchangeable numbers, which facilitates verification of compatibility with a specific vehicle configuration in the manufacturer's catalogs or service software.

The item is marked in the warehouse system with a dedicated SKU, and also has assigned parameters for brand, condition, OEM part number, and interchangeable numbers, which allows for precise identification during the part selection process.

Application in service practice

This type of turbo charger cover is particularly useful for:

• turbocharger regeneration in M57N2 engines,
• repairs after mechanical damage within the turbine housing,
• restoring the factory configuration of the boost system after previous modifications.

Using an original component helps reduce the risk of leaks, improper fitment, or incompatibility with stock equipment, which is significant for both durability and the stability of engine operating parameters.

Expansion of the BMW boost system

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other elements from the same group, such as housings, connectors, or additional boost system components, check the available parts in the BMW Turbochargers and parts category.

For users interested in a broader context of using pre-owned components in German car brands, including vehicles with a similar design philosophy to BMW, the following article discussing when choosing second-hand parts is most economically and technically justified may be helpful: Volkswagen – solidity and reliability. Why are used VW parts a reasonable choice?.