BMW E90 320si Petrol N45 Intake Manifold Air Inlet 11617547644 7547644

BMW E90 320si Petrol N45 Intake Manifold Air Inlet is a precisely engineered intake system component, dedicated to the N45 petrol engine in the 3 Series E90. It is responsible for the controlled supply of air to the cylinders, which has a direct impact on stable engine operation, smooth running, and performance parameters. This is an OEM solution from the Intake Manifolds category, intended for users looking for a technically matched component for the specific 320si version.

Specifications and technical data

• SKU: 7547644
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7547644
• Substitutable numbers: 11617547644, 7547644
• Fuel type: Petrol
• Category: Intake Manifolds

Function of the intake manifold in the N45 engine

The intake manifold in the N45 petrol engine is responsible for the even distribution of air to all cylinders, which is crucial for the correct mixture composition and efficient combustion. In the 320si unit, this is of particular importance due to the high-performance nature of the design, which requires a stable air supply across the entire rev range.

A properly selected intake manifold helps maintain:

• correct throttle response in the low and mid rev ranges,
• repeatable performance parameters during dynamic driving,
• consistency of the engine control system with factory ECU maps.

Dedicated application in the BMW E90 320si

The presented item is intended for installation in the BMW 3 Series E90 in the 320si version with the N45 petrol engine. Thanks to this, the user receives an intake manifold designed for the specific configuration of the power unit, without the need to adapt universal elements.

Such a fit translates into:

• preservation of the factory geometry of the intake channels,
• proper cooperation with engine accessories and sensors,
• reduction of the risk of leaks and problems with ECU adaptation.

Characteristics of the used intake manifold

The offered intake manifold is a used item, which allows for an economical replacement while maintaining the original design specification. This type of solution is particularly attractive for repairs of specialized versions, such as the 320si, where the availability of new components can be limited or costly.

Choosing a used manifold with preserved OEM structure allows you to:

• maintain factory airflow parameters,
• ensure compatibility with original engine accessories,
• optimize service costs while maintaining technical repair correctness.

Benefits of using an original BMW intake manifold

Using an original intake manifold in the BMW E90 320si supports the stable operation of the petrol unit, reduces the risk of ECU errors, and facilitates future diagnostics. The factory design is engineered with a specific engine in mind, ensuring compatibility with the intake, ignition, and exhaust systems.

This solution is recommended especially in situations where:

• the existing manifold has suffered mechanical damage or has leaks,
• there are problems with uneven engine operation related to the intake system,
• the priority is to maintain the performance characteristics typical of the 320si version.

Related elements and further system optimization

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 components cooperating with the air supply system, check the available parts in the BMW Intake Manifolds category.

For users interested in a broader look at gas flow in the power unit and the influence of elements such as manifolds on engine performance characteristics, we have prepared a guide: Performance exhaust system: used manifolds and sports catalytic converters on the road. There you will find practical tips on selecting used components in premium brand cars, including BMW.