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

BMW E90 E91 E92 E93 325d 330d M57N2 Turbo Charger Lower Cover is an original component from the Turbochargers and parts group, designed for BMW diesel engines of the M57N2 family. This used cover provides a solid base for restoring the proper turbocharger shielding, improving the operational safety of the forced induction system and the aesthetics of the engine bay.

Specifications and technical data

• SKU: 7796311-3
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7796311
• Substitutable numbers: 11657796312, 7796312, 7796311
• Category: Turbos & Parts

Purpose and function of the turbocharger cover

The turbocharger cover in BMW 3 Series E90, E91, E92, and E93 models with 325d and 330d M57N2 units is responsible for shielding the hot part of the turbine and adjacent components. It protects neighboring parts from excessive heat radiation, helps organize the routing of hoses and wiring harnesses, and limits the ingress of contaminants into the turbocharger area.

A well-fitted cover ensures:

• stable mounting at factory points above the turbocharger,
• better thermal separation in the forced induction system area,
• a more organized look of the engine bay.

Compatibility with BMW 3 Series and M57N2 engine

The element was designed specifically for use in BMW 3 Series E90, E91, E92, and E93 generations with 325d and 330d M57N2 engines. This means factory-perfect fitment to the geometry of the turbocharger, exhaust manifold, and accessories, without the need for modifications or adaptations.

Thanks to this:

• compliance with the original BMW assembly line is maintained,
• the risk of improper fitment with other covers and thermal components is minimized,
• installation is based on the serial mounting points provided by the manufacturer.

Characteristics of the used OEM component

The cover comes from original BMW production, which translates into correct geometry, appropriate rigidity, and material compatibility with other covers in the engine bay. As a used part, it is a good solution for users who want to maintain the factory specification of the vehicle at reasonable service costs.

Choosing an original, used turbocharger cover allows you to:

• maintain the structural integrity of the forced induction system,
• preserve operating parameters close to factory standards,
• reduce expenses compared to purchasing a new OEM element.

Importance of a proper shield in the forced induction system

A functional turbocharger cover influences the comfort and safety of service operations – it reduces the risk of accidental contact with heated elements and helps maintain order in the engine accessory zone. In vehicles with the M57N2 engine, where the turbocharger operates under significant load, an appropriate shield is an essential complement to the entire forced induction 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 additional covers, mounting hardware, or components working with the turbine, check the available parts in the BMW Turbochargers and parts category.

Technical support and knowledge about used drivetrain components

When working with the drivetrain – especially in cars with powerful diesel units – it is worth knowing the typical signs of wear and the principles of selecting used components. To better understand the relationships between drivetrain elements, such as the differential, sensors, or accessories working with the engine, check out the guide Second-hand differential – what is worth knowing about used differentials, sensors, and drivetrain systems, which helps you consciously plan repairs and upgrades in BMW cars and other brands.