BMW 1 E81 E87 LCI 123d N47S Housing Cover Turbocharger Turbo Part 7804638

The BMW E81 E87 123d N47S Turbo Cover is an original equipment turbocharger and parts component designed for the N47S turbocharger system. This used cover provides a functional service solution for BMW owners who want to restore their turbocharger to its original operating condition while maintaining its factory design.

Specifications and technical data

• SKU: 7804638-4
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7804638
• Substitutable numbers: 11657804638, 7804638
• Category: Turbos & Parts

Purpose and function of the BMW turbo parts cover

This turbo parts cover for the BMW 1 Series E81/E87 123d with the N47S engine is a component of the turbocharger system responsible for the proper routing of exhaust gases or air within the turbocharger (depending on the specific configuration used in a given model). Using the original cover allows you to maintain:

• correct flow geometry within the turbocharger,
• stable mounting of adjacent turbo components,
• tightness of the system in the place factory-prescribed by the manufacturer.

Thanks to this, the supercharging system can operate in conditions close to factory ones, which helps maintain the appropriate performance parameters and engine operating culture.

Construction, fit and BMW compatibility

The cover falls into the Turbochargers and Parts category, meaning it's designed to work with the specific turbocharger used in the N47S engine. Original BMW OE origin translates to:

• precise fit with the turbo body and adjacent elements,
• maintaining the factory mounting points, without the need for modifications,
• compatibility with the intended replaceable numbers within this reference.

This adjustment is particularly important for components operating at high temperatures and under load, where even slight deviations can lead to leaks or accelerated wear.

Used condition - practical service benefits

The turbocharger cover is offered in used condition, which represents a reasonable compromise between repair cost and maintaining original build quality. In many cases, this component is chosen as an alternative to new parts, especially when:

• only the turbocharger housing or cover was damaged,
• the remaining components of the charging system are functional,
• What counts is quick availability and compatibility with the factory solution.

A used cover allows you to reduce repair costs while maintaining the original assembly specifications, which is important both for workshops specializing in BMW and for informed users who assemble the parts themselves.

Application in turbocharger diagnostics and regeneration

This type of element is often used for:

• turbocharger regeneration when it is necessary to replace a damaged housing part,
• post-accident repairs in which mechanical damage to the external turbo components occurred,
• upgrades or interleavings within N47S units within the same engine family.

Selecting the correct cover according to the OEM part number and interchangeable numbers (visible in the technical specifications) facilitates correct identification and minimizes the risk of incompatibility during assembly.

Substantive support and selection of used components

When choosing used drivetrain components—such as turbochargers, gearboxes, or other key components—it's worth considering not only price but also technical condition and compatibility with a specific engine version. If you're also considering purchasing other used drivetrain components, the article " Used Gearboxes – When Does It Pay Off and What You Need to Remember" may be helpful. It discusses practical criteria for assessing cost-effectiveness and risk when choosing used parts.

If you are also looking for other components from the turbochargers and parts category for BMW, check out our offer: turbochargers and parts for BMW , where you will find a wide selection of compatible components for various models of this brand.

For additional tips on choosing between new and used parts, see our guide: Car Parts – New or Used? We compare costs, quality, and durability , helping you plan your vehicle's service strategy.