Mercedes W639 W906 Engine Oil Pump OM651 Vane Pump Part Sprocket A6511801400

Mercedes W639 W906 Engine Oil Pump OM651 Vane Pump Part Sprocket is a component from the Oil pumps and parts group, designed for the engine lubrication system in Mercedes vehicles with the OM651 petrol engine unit. It is responsible for the stable transmission of the oil pump drive, which translates into correct lubrication pressure and safe operation of the power unit. A used OEM component is a sensible choice for technical repairs or engine reconstruction when you care about factory geometry and fitment.

Specifications and technical data

• SKU: A6511801400-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6511801400
• Substitutable numbers: A6511801400, A 651 180 14 00, A6511811801, A 651 181 18 01, A6511801301, A 651 180 13 01, A6511810512, A 651 181 05 12, A6511810312, A 651 181 03 12
• Fuel type: Petrol
• Category: Oil Pumps & Parts

Purpose and function in the OM651 engine

The oil pump sprocket in the OM651 engine is responsible for the mechanical coupling of the pump with the engine's drive system. A correctly selected component ensures:

• stable torque transmission to the oil pump,
• maintenance of proper oil pressure throughout the entire rev range,
• even lubrication of critical power unit components.

By maintaining the original design, the used OEM component allows for the preservation of lubrication system operating parameters in accordance with the manufacturer's specifications, which is particularly important in modern petrol engines.

Benefits of using an original oil pump and sprocket

Choosing an original solution from the Oil pumps and parts group is important for both durability and engine refinement. Compared to random replacements, the factory component ensures:

• precise fitment with other lubrication system components,
• preservation of factory clearances and gear geometry,
• lower risk of noise, vibrations, and accelerated wear.

For petrol engines, where oil operates at high temperatures and under variable loads, stable oil pump operation is crucial for protecting bearings, the camshaft, and the turbocharger (if present in the specific configuration).

Application in Mercedes W639 and W906 vehicles

The presented component is intended for Mercedes W639 and W906 series vehicles equipped with the OM651 petrol engine. Using a used OEM component allows for:

• restoring the factory operating characteristics of the lubrication system,
• reducing repair costs while maintaining high-quality parts,
• easier identification and matching thanks to compliance with the OEM part number and interchangeable numbers (visible in the specification).

This solution works well for both standard repairs and more extensive power unit rebuilds when you want to maintain the original Mercedes design concept.

Why it is worth choosing a used OEM component

A used original component is a compromise between cost and quality. In the case of elements such as the oil pump sprocket, the following are important:

• factory materials and heat treatment technology,
• accuracy of gear teeth and mating surfaces,
• compliance with the requirements of the OM651 engine manufacturer.

Thanks to this, you can reduce the risk of oil pressure problems, which in extreme cases lead to serious damage to the power unit. The original Mercedes solution is designed for long-term operation in demanding conditions, which is especially important in commercial and delivery vehicles.

Lubrication system expansion and selection of other components

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other elements from the same group, such as the oil pump housing, drive shaft, or additional mounting elements, check the available parts in the Mercedes Oil pumps and parts category.

When planning a repair, it is also worth paying attention to the general condition of the power unit, oil pressure parameters, and service history. A good practice is to combine the replacement of lubrication system components with a check of the condition of bearings, seals, and oil lines, which helps reduce the risk of further vehicle downtime.

Technical support and part selection

When making decisions about the scope of repairs, materials comparing different approaches to vehicle regeneration after damage can be helpful. If you want to better understand when it is worth reaching for used components and when for replacements, read the article Post-accident repair of your car: why are used body parts a better choice than replacements?. Although it mainly concerns body parts, it well illustrates the logic of choosing used OEM parts in the context of quality and fitment.