Volkswagen Passat B8 Arteon 3H Water Coolant Pipe Flange Connector 04L121131AA

Volkswagen Passat B8 Arteon 3H Water Coolant Pipe Flange Connector is an original cooling system component from the Lines, hoses and pipes category, designed for precise coolant flow within the engine. Thanks to its factory geometry and specific fitment for the Volkswagen platform, it ensures a stable connection of lines and proper fluid circulation, which promotes safe and predictable engine operation.

Specifications and technical data

• SKU: 04L121131AA
• Mark: Volkswagen
• Condition: Used
• OEM Part Number: 04L121131AA
• Substitutable numbers: 04L121131AA, 04L 121 131 AA
• Category: Hoses, Lines & Pipes

Purpose and function in the cooling system

The presented connector is a cooling system component responsible for directing coolant flow between individual sections of the installation. Its task is to maintain a tight, stable connection with adjacent lines and pipes, which reduces the risk of leaks and pressure drops in the circuit.

A properly selected connector helps to:

• maintain the correct engine operating temperature,
• ensure even coolant flow,
• minimize thermal stress on aluminum and plastic components in the engine compartment,
• reduce the risk of overheating under high engine load.

Original origin and Volkswagen fitment

The connector was designed by Volkswagen with the specific engine architecture used in the Passat B8 and Arteon 3H models in mind. This means maintaining factory mounting points, correct connection diameters, and pipe routing angles, which facilitates installation and avoids stress on adjacent lines.

In practice, this translates into:

• secure fitment with other cooling system components,
• no need for modifications or adjustments required by aftermarket replacements,
• preservation of the original coolant flow geometry.

Performance characteristics of the used component

The offered connector comes from the secondary market, which allows for an economical repair of the cooling system while maintaining a component of factory origin. A used part is a good solution in situations where the priority is compliance with the original specification and reducing service costs.

Choosing such a component is particularly beneficial when:

• the existing connector has suffered mechanical damage (cracking, breakage of the nozzle, damage to the mount),
• there are leaks around the coolant line connections,
• it is necessary to replace several cooling system components in one service cycle.

Benefits of using a dedicated connector

Using the correct water coolant pipe flange connector in a Passat B8 or Arteon 3H allows for maintaining stable engine operating conditions and reducing the risk of failures related to overheating. Factory fitment facilitates installation, shortens service time, and reduces the probability of leaks at critical points in the system.

In combination with properly selected lines, hoses, and other cooling pipes, such a component supports long-term, repeatable engine performance, which is important both in daily operation and during intensive vehicle use.

If you are planning a comprehensive repair or upgrade of the engine area in your Volkswagen and need other components from the same group, such as flexible hoses, rigid pipe sections, or cooling system connectors, check the available parts in the Volkswagen lines, hoses and pipes category.