7809671

7809671 is an original component from the Intake manifolds group, designed for the M57N2 engine in high-performance BMW 335d units and selected facelifted X3 and 3 Series models. Using an intake manifold of this type allows for maintaining the factory cylinder filling characteristics, which translates into stable engine operation and predictable performance.

Specifications and technical data

• SKU: 7809671-4
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7809671
• Substitutable numbers: 11617809671, 7809671
• Category: Intake Manifolds

Purpose and compatibility

The presented intake manifold is dedicated to the M57N2 diesel engine installed in BMW X3 E83 models and facelifted (LCI) BMW 3 Series E90, E91, and E92 in the 335d version. Using an original component from the same engine family ensures proper fitment to the cylinder head, correct cooperation with auxiliary equipment, and maintenance of factory air flow parameters. Thanks to a design consistent with the factory specifications, the manifold works with the stock intake system, engine management, and other powertrain components, which facilitates installation and reduces the risk of operational issues.

Technical characteristics of the intake manifold

The intake manifold in the M57N2 engine is responsible for the even distribution of air to individual cylinders, which has a direct impact on engine refinement, dynamics, and fuel consumption. The use of the original intake port geometry allows for maintaining:

• stable cylinder filling across the entire rev range,
• proper cooperation with the turbocharging system,
• consistency with engine control unit maps,
• appropriate torque characteristics. Choosing a used, original manifold from this series is a beneficial solution for users who want to maintain the factory engine specification without the need to use aftermarket replacements with uncertain parameters. The original design also facilitates easier diagnostics and future servicing.

Condition, origin, and benefits of installation

The item comes from dismantling and is offered as a used part, which allows for significantly reducing repair costs compared to a new OEM component. At the same time, you retain the advantages of the factory design, such as proper fitment, adequate body rigidity, and predictable behavior under high thermal and pressure load conditions. The main benefits of using this manifold in a BMW X3 or 3 Series 335d include:

• maintaining the stock operating characteristics of the M57N2 engine,
• easier installation thanks to factory mounting points,
• compatibility with stock intake equipment and controls,
• economical restoration of the intake system's efficiency.

Technical support and part selection

When selecting an intake manifold for a BMW, it is worth paying attention to compatibility with the specific engine version and body generation. This model is intended for the M57N2 unit in 335d versions and corresponding X3 E83 and 3 Series E90/E91/E92 LCI configurations, making it the right choice for intake system repairs in these vehicles. In case of doubt, it is worth comparing the shape and layout of the ports with the currently installed element. 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 manifolds, intake elements, or related components, check the available parts in the BMW intake manifolds category.

More information about intake and exhaust systems

For users interested in a broader context of modifications and servicing of BMW diesel engines and other brands, materials regarding the cooperation of manifolds with the exhaust system and performance elements may be useful. To better understand the relationships between the manifold, turbocharger, and the rest of the system, it is worth reading the article Performance exhaust system: used manifolds and sports catalytic converters on the road, which discusses practical aspects of selecting and operating used components.