Mercedes W177 Automatic Gearbox Oil Pump 12479063203 A2479063203

Mercedes W177 Automatic Gearbox Oil Pump is an original component from the Oil pumps and parts category, designed for the drivetrain in Mercedes compact class models. This used pump allows for a technical, cost-effective, and precise repair of the automatic transmission while maintaining the factory performance characteristics of the lubrication system.

Specifications and technical data

• SKU: A2479063203
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2479063203
• Substitutable numbers: A2479063203, A 247 906 32 03, 12479063203
• Gearbox type: Automatic
• Category: Oil Pumps & Parts

Function and application in the automatic transmission

The oil pump in an automatic transmission is responsible for generating the appropriate operating oil pressure, which controls the operation of clutches, planetary gears, and hydraulic control systems. In the case of the transmission in the Mercedes W177, a properly functioning pump ensures:

• stable oil pressure across the full load range,
• smooth and predictable gear shifts,
• protection of friction elements against overheating,
• maintenance of proper lubrication during city and highway driving.

By maintaining the original design, the pump works in harmony with the factory automatic transmission control system, which reduces the risk of malfunctions or diagnostic errors after installation.

Benefits of using an original oil pump

Using an original oil pump in a Mercedes automatic transmission translates into a number of practical service and operational benefits. Compared to aftermarket replacements, the OEM component ensures:

• factory fitment to the transmission housing and oil channel system,
• compliance with pressure parameters specified by the manufacturer,
• proper cooperation with the original transmission control unit software,
• reduced risk of leaks and pressure drops in the long term.

For workshops specializing in Mercedes automatic transmissions, this means a more predictable repair result and a lower number of complaints related to the operation of the lubrication system.

Installation characteristics and part selection

The oil pump designed for the automatic transmission in the Mercedes W177 is engineered as a component compatible with a specific type of transmission. When selecting the part, it is crucial to match it to the transmission type and verify compatibility with the OEM number and interchangeable numbers in the service documentation or manufacturer's catalog.

During installation, it is recommended to:

• thoroughly clean the oil channels and the transmission housing,
• check the condition of seals and replace them with new ones if necessary,
• use oil with the specification required by Mercedes for the given transmission,
• perform adaptations or service procedures required for the automatic transmission after replacing hydraulic components.

This approach allows for fully utilizing the potential of the installed pump and limiting the risk of secondary failures resulting from contamination or improper system filling.

Used condition and economic aspects

The offered pump comes from the used parts segment, which provides an attractive cost solution while maintaining the manufacturer's original specification. In many cases, choosing a verified used oil pump for an automatic transmission is a favorable compromise between a full transmission rebuild and installing a new component.

If you want to better understand the differences between rebuilding and installing original salvaged parts, it is worth reading the article: Refurbished or original used – which part to choose for repairs?. This will allow you to consciously choose a service strategy for your specific automatic transmission repair case.

Expanding repairs within the Mercedes lubrication system

If you are planning a comprehensive repair or upgrade of the automatic transmission lubrication system in your Mercedes and need other elements from the same group, such as pump housings, drive elements, or additional hydraulic components, check out the available parts in the Mercedes oil pumps and parts category.