Mercedes A207 W204 W212 Transmission Oil Coller Line Right O/S A6421807030

Mercedes A207 W204 W212 Transmission Oil Coller Line Right O/S is an original component from the Oil coolers and lines group, designed for the precise routing of oil in the automatic transmission on the right side of the vehicle. A properly selected oil line ensures stable operating pressure, supports efficient cooling, and reduces the risk of leaks, which translates into safe and predictable operation of the drivetrain. This is a solution for users who expect factory-fit quality and consistency with the transmission design in Mercedes vehicles.

Specifications and technical data

• SKU: A6421807030
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6421807030
• Substitutable numbers: A6421807030, A 642 180 70 30
• Location on the vehicle: Right
• Part type: Oil Cooler Line
• Category: Oil Coolers & Lines

Purpose and function of the oil line

The described transmission oil line is designed to operate within the transmission oil circuit, where it is responsible for transporting the medium between the transmission and the cooling system components. Its placement on the right side of the vehicle allows for proper routing of the oil line in accordance with the factory geometry of the body and drivetrain components. This ensures an appropriate distance from heat-generating elements and moving suspension parts.

A properly selected oil line is crucial for:

• maintaining a stable transmission oil temperature,
• reducing pressure drops in the system,
• minimizing the risk of leaks and air entering the circuit,
• maintaining the smooth operation of the automatic transmission.

Benefits of using an original Mercedes line

Using an oil line from the same production line as other Mercedes drivetrain components allows for maintaining the technical consistency of the entire system. The original connection geometry and line length facilitate installation and reduce the need for system modifications, which is particularly important in vehicles equipped with extensive oil cooling systems.

The main advantages of this solution include:

• factory fit for transmission mounts and ports as well as the oil cooler,
• preservation of the oil flow path designed by the manufacturer,
• reduced risk of collision with other lines and suspension components,
• easier diagnostics of potential leaks in the future.

Installation and operational characteristics

The transmission oil line on the right side is a component that operates under conditions of variable pressure and temperature, which is why its correct installation has a direct impact on the durability of the entire system. During installation, attention should be paid to the proper positioning of the line in the brackets and the correct tightening of the connectors to avoid micro-leaks and mechanical stress.

In service practice, replacing the oil line is recommended in situations where:

• there are visible signs of corrosion or mechanical damage,
• oil leaks appear in the vicinity of the connections,
• the oil cooling system was disconnected during other repairs,
• diagnostics indicate pressure drops in the transmission oil circuit.

Selecting a line consistent with the design of the transmission and cooling system helps reduce the risk of overheating and extends the service life of the automatic transmission.

Integration with the oil cooling system

The transmission oil line belongs to the group of components referred to as Oil coolers and lines, which are responsible for maintaining stable transmission oil operating parameters. In Mercedes vehicles, this system is designed to ensure the most uniform heat dissipation possible, which is important both in city driving and under highway conditions.

To better understand the impact of a functional oil and coolant circuit on the durability of the engine and transmission, it is worth reading the guide material on the diagnostics and operation of cooling systems – this is discussed in detail in the article Engine cooling system – overheating, repair, and used radiators.

Informed choice of a used component

Choosing a used transmission oil line for a Mercedes is a solution that allows you to maintain factory specifications while reducing service costs. A dismantled part, coming from an original installation, ensures structural compatibility with the drivetrain and enables the maintenance of high vehicle functionality without the need to use unreliable replacements.

If you want to deepen your knowledge about the impact of reusing original components on the environment and vehicle operation, the article Sustainable automotive: How purchasing original used parts reduces the carbon footprint and protects the environment?, which discusses the benefits of using dismantled parts, will be helpful.

If you are planning a comprehensive repair or upgrade of the oil cooling area in your Mercedes and need other components from the same group, such as oil lines, oil coolers, or oil line connectors, check the available parts in the Mercedes oil coolers and lines category.