BMW E90 E91 LCI Turbocharger Housing 316d 318d N47N Diesel 8506722

BMW E90 E91 LCI Turbocharger Housing 316d 318d N47N Diesel is an original turbocharging system component designed for N47N series diesel engines. Thanks to its factory geometry and precise casting, it ensures proper exhaust gas flow and stable mounting of the turbine core, which translates into correct turbocharger operation and the maintenance of the engine's factory parameters.

Specifications and technical data

• SKU: 8506722-4
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8506722
• Substitutable numbers: 11658506722, 8506722, 7812321
• Fuel type: Diesel
• Part type: Turbocharger
• Category: Turbos & Parts

Purpose and function of the turbocharger housing

The turbocharger housing in a diesel engine plays a key role in the turbocharging system – it is responsible for directing the exhaust gas stream onto the rotor, maintaining airtightness, and ensuring a stable connection with the exhaust manifold and the rest of the system. In the case of N47N units installed in BMW 3 Series E90/E91 LCI models, a correctly selected housing is essential for maintaining proper boost pressure, dynamics at low RPM, and the correct operating temperature of the turbine. Using a dedicated housing for the 316d and 318d versions allows you to avoid problems with fitment, leaks, or incorrect positioning of ports and mounting points. This is particularly important when servicing the turbocharging system, when the goal is to maintain the factory engine performance characteristics and compatibility with auxiliary equipment.

Benefits of using an original BMW housing

Choosing an original turbocharger housing from the Turbochargers and parts group provides a number of practical benefits in daily operation:

• factory fitment for the N47N unit in 316d and 318d versions, without the need for modifications to mounts or lines,
• maintenance of the correct exhaust channel geometry, which promotes stable boost pressure build-up,
• compatibility with original turbine accessories and the exhaust system in E90 and E91 LCI bodies,
• possibility of using the existing engine control configuration without software changes. As a result, the housing serves as a solid base for turbocharger regeneration or staged repair, especially when only the housing is damaged while the remaining turbocharging system components remain functional.

Characteristics of the used component

The offered housing comes from dismantling and is a used component, which allows for an economical repair of the turbocharging system while maintaining the original BMW specification. This type of part is particularly attractive in situations where damage affects only the housing (e.g., cracks, damaged mounts), and the remaining turbocharger components qualify for further use or regeneration. Choosing a used OEM housing is often preferred by workshops specializing in diesel engine service, as it allows for maintaining the structural integrity of the system while reducing costs compared to purchasing a complete new turbocharger.

Professional installation and powertrain diagnostics

When replacing the turbocharger housing in a diesel engine, it is worth simultaneously verifying the condition of the entire powertrain – from the turbocharging system and intake to the clutch and transmission. Good practice includes checking the tightness of lines, the condition of the intercooler, and elements responsible for torque transmission. Detailed tips on diagnostics and component selection in this area can be found in the article Clutch and dual-mass flywheel – diagnostics and selection of parts for the powertrain, which discusses practical aspects of drivetrain service in vehicles with diesel engines.

Expanding turbocharging system service in BMW

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 turbine housings, mounting elements, or associated components, check the available parts in the BMW Turbochargers and parts category.