BMW 3 Series 1 E90 E91 E92 E93 LCI Front Hood Suction Air Intake Inlet Duct

BMW 3 Series 1 E90 E91 E92 E93 LCI Front Hood Suction Air Intake Inlet Duct is an original air supply system component designed for installation in the front part of the engine bay. As part of the Intake Manifolds group, it is responsible for precisely directing air to the subsequent intake components, supporting the stable operation of the power unit. This used OEM component is a sensible choice for servicing the factory intake system in a facelifted (LCI) BMW 3 Series.

Specifications and technical data

• SKU: 7791985-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7791985
• Substitutable numbers: 13717791985, 7791985
• Location on the vehicle: Front
• Category: Intake Manifolds

Purpose and function in the intake system

The presented air intake duct is a component mounted in the front part of the vehicle, directly behind the hood, where it captures the airflow coming from the outside. Its task is to direct air to the further sections of the supply system, which promotes even filling of the intake manifold and stable engine operating parameters.

This type of solution used in the BMW 3 Series E90/E91/E92/E93 LCI generation allows for:

• orderly airflow in the front zone of the engine bay,
• reduction of turbulence and flow losses before the intake manifold,
• maintaining the consistency of the factory intake system geometry.

Compatibility with BMW 3 Series E90/E91/E92/E93 LCI

BMW 3 Series E90/E91/E92/E93 LCI uses dedicated intake components, matched to the shape of the front panel, hood, and engine accessories. Using the original air intake duct ensures:

• proper fitment with factory mounts in the front part of the body,
• compliance with the geometry of the stock intake manifold,
• maintenance of the airflow path intended by the manufacturer.

Thanks to this, the installation proceeds in a predictable manner, without the need for structural modifications or fitting universal parts.

Characteristics of the used OEM component

The offered air intake duct is an original BMW part from the aftermarket. The used component allows for maintaining the factory concept of the intake system while optimizing service costs. Compared to universal replacements, the OEM element ensures:

• compliance with factory mounting points in the front zone of the vehicle,
• appropriate cross-sectional shape for the Intake Manifolds system,
• consistency with other intake components in the BMW 3 Series LCI.

This is a practical solution when replacing a damaged or missing air intake duct after a collision, body repairs, or engine bay upgrades.

Benefits of maintaining the factory intake system

Using the original air intake duct in the BMW 3 Series E90/E91/E92/E93 LCI helps maintain predictable power unit operating parameters. Preserving the stock airflow path promotes:

• stable intake manifold filling characteristics,
• proper cooperation with the stock engine control unit calibration,
• reduction of the risk of unwanted changes in airflow.

For users who want to keep the car in a configuration close to the factory one, this is a technically consistent solution that is easy to integrate with other intake sub-assemblies.

Related components and technical knowledge

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other components from the same group, such as additional air intake ducts, transition elements, or housings working with the intake, check the available parts in the BMW Intake Manifolds category.

For users interested in a broader view of gas flow in a car – from the intake to the exhaust – an article describing the relationships between manifolds and the rest of the system may be useful. More information can be found in the material: Performance exhaust system: used manifolds and sports catalytic converters on the road.