Mercedes W164 W251 W639 Intake Manifold Charge Air Line Left N/S A6420902737

Visual condition of the part

The product shows signs of use visible in the photos.

Mercedes W164 W251 W639 Intake Manifold Charge Air Line Left N/S is an original air supply system component designed for installation on the left side of the engine in selected Mercedes models. This used manifold from this series ensures factory-standard intake duct geometry, which promotes stable engine performance and proper interaction with the control electronics. It is an ideal solution for users who expect a part that is structurally consistent with the factory design while maintaining cost-effective maintenance.

Specifications and technical data

• SKU: A6420902737-2
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6420902737
• Substitutable numbers: A6420902737, A 642 090 27 37
• Location on the vehicle: Left
• Category: Intake Manifolds

Purpose and vehicle placement

The presented manifold belongs to the Intake manifolds group and is designed to operate on the left side of the engine. This placement on the vehicle allows for proper routing of the intake ducts, matching of factory mounting points, and correct connection of engine accessories. Using a dedicated left-side manifold reduces the risk of leaks, installation stress, and compatibility issues with factory components.

Technical and functional characteristics

The intake manifold is responsible for the even distribution of air to the cylinders, which has a direct impact on engine refinement, performance, and fuel consumption. The design of this component was developed by the manufacturer with the following in mind:

• maintaining the appropriate air flow velocity in the ducts,
• stable operation across the full load range,
• compatibility with the factory engine control system,
• correct positioning of sensors and accessories.

As a result, the manifold can be used as a replacement part in vehicles where it is necessary to maintain the original engine performance parameters without the need for software modifications or additional mechanical alterations.

Benefits of using an original Mercedes manifold

Choosing an original intake manifold for a Mercedes allows you to maintain the integrity of the entire air supply system. Key advantages of this solution include:

• Factory fitment – compatibility with the standard engine geometry and accessories, which facilitates installation and reduces service time.
• Predictable performance parameters – maintaining air flow characteristics consistent with the vehicle manufacturer's specifications.
• Compatibility with the control system – no need for engine map interference or additional adaptations.
• Economical repair option – a used component allows for lower costs while maintaining a design consistent with the original.

This approach is particularly beneficial for vehicles in intensive use, where both reliability and rational maintenance costs are important.

Condition, verification, and service application

The offered manifold comes from the used parts segment, which allows for combining functionality with an attractive purchase price. This type of component is frequently chosen by workshops specializing in the Mercedes brand when a quick replacement of a damaged manifold is necessary without waiting for new component deliveries. Using an original, used part enables the maintenance of structural consistency throughout the entire intake system.

Mercedes intake manifolds – expansion and modernization of the intake system

If you are planning a comprehensive repair or modernization of the engine area in your Mercedes and need other elements from the same group, such as additional manifolds, intake duct components, or intake housings, check the available parts in the Mercedes intake manifolds category.

More about selecting used exhaust and air flow system components

When planning work within the intake and exhaust system, it is worth paying attention to the relationships between the manifold, catalytic converter, and other components responsible for exhaust and air flow. For users interested in a broader perspective on the selection of used manifolds and performance elements, the following article will be useful: Performance exhaust system: used manifolds and sports catalytic converters on the road.