Mercedes W166 Vacuum Hose Line Pipe Tube A1664300429

Mercedes W166 Vacuum Hose Line Pipe Tube is an original vacuum system component designed for the W166 series models. As part of the Lines, hoses and pipes group, it ensures stable vacuum routing in critical areas of the engine and auxiliary equipment, which translates into predictable operation of vacuum-controlled systems. Using an OEM component is a sensible choice when servicing the factory installation without interfering with its design.

Specifications and technical data

• SKU: A1664300429
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1664300429
• Substitutable numbers: A1664300429, A 166 430 04 29
• Category: Hoses, Lines & Pipes

Technical characteristics of the vacuum hose

The vacuum hose in the Mercedes W166 is responsible for the controlled transmission of vacuum between engine control system components and auxiliary equipment. The properly selected internal diameter, wall rigidity, and routing geometry of the hose limit pressure drops and minimize the risk of kinking, which is crucial for the correct operation of valves, actuators, and regulators.

The original design of the hose was engineered for specific mounting points in the body and engine compartment, ensuring:

• stable vacuum line routing without collision with other components,
• appropriate bending radius in critical areas,
• repeatable flow parameters throughout the entire working section.

Purpose and application in the vehicle system

Mercedes W166 Vacuum Hose Line Pipe Tube is a component factory-fitted to the architecture of the vacuum system in this model. Its task is to provide a tight connection between the vacuum pump, manifolds, and vacuum receivers, which contributes to:

• correct response of vacuum-controlled systems,
• stability of engine operating parameters under various load conditions,
• reduced risk of diagnostic errors related to system leaks.

Thanks to the factory fitment for the specific W166 body platform, installation is orderly, without the need to modify the hose route or use additional clamps and adapters.

Benefits of using an original vacuum hose

Using an original hose from the Lines, hoses and pipes group instead of universal elements reduces the risk of operational problems resulting from mismatched diameter, length, or shape. In practice, this means:

• maintaining the factory operating characteristics of the vacuum system,
• lower load on the vacuum pump due to proper line throughput,
• easier diagnostics in the future, as the hose routing corresponds to service documentation.

Using an OEM component allows for maintaining the consistency of the entire system while optimizing repair costs, which is particularly important for comprehensive servicing of premium class vehicles.

Component condition and installation aspects

The offered hose comes from dismantling and has the status of a used component, which in practice means it retains the original geometry and mounting points characteristic of the factory installation. This type of part is particularly useful in situations where the existing hose has suffered mechanical damage, abrasion, or has lost flexibility due to wear.

During installation, it is recommended to:

• check the condition of the sockets and connectors to which the hose is connected,
• verify correct positioning relative to adjacent wiring harnesses and thermally loaded components,
• perform a vacuum system leak test after completing the work.

Selection by OEM number and purchase support

To precisely verify the compatibility of the hose with the specific engine version and model year of your Mercedes, it is worth using the OEM number and vehicle data. A practical guide describing step-by-step how to verify parts by numbers and car data may be helpful – you can find it in the article Guide: how to choose the right car part by VIN and OEM number.

If you are planning a comprehensive repair or upgrade of the vacuum system area in your Mercedes and need other elements from the same group, such as flexible hoses, rigid pipes, or additional service lines, check the available parts in the Mercedes lines, hoses and pipes category.