BMW X3 E83 E90 E91 E92 LCI 335d M57N2 Engine Intake Inlet Manifold 7790480

BMW X3 E83 E90 E91 E92 LCI 335d M57N2 Engine Intake Inlet Manifold is an original component from the Intake Manifolds category, designed for the M57N2 engine in BMW X3 and 3 Series LCI models. This used OEM intake manifold ensures proper airflow to the cylinders, which translates into stable engine operation and predictable performance. It is an ideal solution for users who require factory intake geometry and full compatibility with engine accessories.

Specifications and technical data

• SKU: 7809671-3
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7809671
• Substitutable numbers: 7809671, 11617809671, 7790480, 11617790480
• Category: Intake Manifolds

Purpose and compatibility

The presented intake manifold is dedicated to the M57N2 engine in the 335d version, used in the BMW X3 E83 and the BMW 3 Series E90, E91, and E92 LCI (Life Cycle Impulse) models. The manifold's design is tailored to the intake system of these units, allowing for the maintenance of stock performance parameters, proper cylinder filling, and correct interaction with the factory engine control unit.

By maintaining the original architecture of the intake runners, the manifold supports even air distribution between cylinders, which is essential for smooth operation, dynamics, and fuel efficiency. This is particularly important in high-performance diesel engines, where stable pressure and airflow are crucial for the durability of the engine components.

Construction and function of the intake manifold

The intake manifold in the M57N2 engine is responsible for directing air from the forced induction system to individual cylinders while maintaining the appropriate flow velocity and minimal pressure loss. The original BMW design ensures:

• channels with an optimized cross-section, matched to the characteristics of the 335d engine,
• mounting points for stock sensors and accessory components,
• maintenance of factory intake system tightness when installed correctly.

Such a solution allows for maintaining engine performance parameters in accordance with the manufacturer's specifications, without the need for ECU map modifications or interference with other intake system components. For the user, this means predictable vehicle behavior and easier diagnostics in the future.

Benefits of using an original BMW intake manifold

Choosing an original manifold from the Intake Manifolds group for your BMW offers a number of practical advantages:

• Factory fitment – compatibility with M57N2 engine mounts, seals, and accessories, with no modifications required.
• Consistency with the control system – maintenance of airflow parameters to which the stock engine controller is calibrated.
• Easier service installation – the mechanic works with a known, stock design, which reduces replacement time and minimizes the risk of installation issues.
• Stable engine operation – a properly selected intake manifold reduces the risk of rough idling, power drops, or airflow-related error codes.

Condition, origin, and service application

The part is sourced from vehicle dismantling and is offered as a used OEM BMW intake manifold. This is a particularly cost-effective solution compared to new aftermarket replacements, while retaining the original design and purpose. This type of part is suitable both for standard replacement of a damaged manifold and for comprehensive servicing of the M57N2 335d engine.

Due to its factory origin, the manifold is suitable for users who want to keep their car in a configuration close to stock, without experimenting with unreliable tuning solutions. It is also a beneficial option for workshops specializing in BMW service, where installation repeatability and predictable repair results are paramount.

More parts from this group and technical knowledge

If you are planning a comprehensive repair or upgrade of your BMW's engine area and need other items from the same group, such as other intake manifolds, intake duct components, or parts cooperating with the air supply system, check out the available parts in the BMW Intake Manifolds category.

If you are interested in a broader context of how the intake system works and its interaction with the exhaust system in cars like BMW, it is worth reading our guide: Performance exhaust systems: used manifolds and sports catalytic converters on the road. Additionally, to better understand the importance of original components in vehicle maintenance, you can use the article OEM quality assurance and safety – why used original car parts are the best choice for your car?, which discusses the benefits of using OEM parts in daily operation.