Oil Pipe Mercedes W212 OM651 Automatic Transmission Cooler Line Hose A6511802430

Oil Pipe Mercedes W212 OM651 Automatic Transmission Cooler Line Hose is an original lubrication system component for automatic transmissions, designed for Mercedes models with the OM651 engine. This used set of lines ensures proper oil circulation between the transmission and the cooler, which translates into stable operating temperatures and safe conditions for the automatic transmission.

Specifications and technical data

• SKU: A6511802530
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6511802530
• Substitutable numbers: A6511802530, A 651 180 25 30, A6511802430, A 651 180 24 30, A6511800330, A 651 180 03 30, A6511800430, A 651 180 04 30
• Gearbox type: Automatic
• Category: Oil Coolers & Lines

Purpose and function in the oil cooling system

The oil lines in an automatic transmission are responsible for transporting the lubricating medium to the oil cooler and back, stabilizing the transmission's operating temperature. For OM651 family units, proper oil flow is crucial for the durability of the automatic transmission, reducing the risk of overheating, pressure loss, and accelerated wear of internal components.

This item belongs to the Oil coolers and lines category, meaning it works directly with the transmission oil cooling system, creating a tight and precise connection between the transmission and the heat exchanger.

Benefits of using original oil lines

Using original oil lines in a Mercedes with an automatic transmission allows you to maintain factory flow and pressure parameters. As a result:

• you maintain the proper transmission operating temperature across a wide range of loads,
• you minimize the risk of leaks at the connections with the oil cooler,
• you reduce the possibility of oil pressure drops in the transmission lubrication system,
• you increase the predictability of the automatic transmission's performance during city and highway driving.

For users who operate their vehicle under increased load conditions (towing, highway driving, high ambient temperatures), functional oil lines are an essential element of prevention against costly transmission repairs.

Application in automatic transmission

The lines have been designed to work with the automatic transmission, which means appropriate diameters, routing shapes, and end types for factory connectors. In practice, this translates into:

• secure mounting at original attachment points on the chassis and transmission,
• correct routing of the lines while maintaining required bending radii,
• reduction of mechanical stress and vibrations that could cause micro-cracks or leaks.

Such a fit is particularly important in modern transmissions, where the oil cooling system is an integral part of the entire control and thermal protection system.

Product characteristics and condition

The offered Mercedes brand component comes from dismantling and is classified as used. For many users, this represents a favorable compromise between cost and maintaining the manufacturer's original specifications. A used automatic transmission oil line, provided it maintains its integrity and correct geometry, can successfully continue to operate in the vehicle, ensuring proper oil flow and compatibility with the existing cooler.

Before installation, a standard visual inspection for any signs of external corrosion, mechanical damage, and the condition of the connection ends is recommended, as well as replacing seals in accordance with the vehicle manufacturer's service procedure.

Technical support and additional materials

If you want to better understand how the oil cooling system affects the durability of the powertrain and transmission, it is worth checking out the guide material describing engine overheating and the role of oil coolers – you can find it in the article Engine cooling system – overheating, repair, and used coolers. This is a practical addition to your knowledge when planning service work on your Mercedes.

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