Mercedes C Class W203 OM646 Diesel Oil Pump Intake Manifold Pipe A6461800151

Oil pump manifold suction pipe for Mercedes C-Class W203 with OM646 diesel engine is an original lubrication system component, designed for installation at the front of the engine unit. Thanks to its factory geometry and precise fit for OM646 Diesel engines, it ensures stable oil intake from the sump and proper pump operation under demanding conditions.

Specifications and technical data

• SKU: A6461800151
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6461800151
• Substitutable numbers: A6461800151, A 646 180 01 51, BG
• Location on the vehicle: Front
• Fuel type: Diesel
• Category: Oil Pumps & Parts

Purpose and Function in OM646 Engine

The described oil pump manifold suction pipe is a component of the lubrication system in the OM646 diesel engine used in the Mercedes C-Class W203. It is responsible for delivering oil from the sump to the pump, which is crucial for maintaining adequate lubrication pressure for all engine components during operation at various RPMs.

Its location at the front of the engine unit facilitates servicing and inspection of the component's condition during work related to the lubrication system, oil sump, or oil pump. Using a dedicated component for the Diesel engine reduces the risk of leaks and oil suction problems, which can lead to accelerated wear of the engine unit.

Construction and Fit for Mercedes C‑Class W203

The oil pump manifold suction pipe has been specifically designed for the OM646 engine construction in the Mercedes C-Class W203, ensuring proper oil channel routing and compatibility with the factory oil sump and the pump itself. The appropriately selected cross-section of the pipe and the shape of the connection spigots support stable oil flow across the entire engine operating range.

Its original origin from the Oil Pumps and Parts group means adherence to factory dimensional tolerances, which is important for installation in the confined space at the front of the engine. This allows the component to work well with the engine unit's accessories, minimizing the risk of assembly stress and leaks at the connections.

Condition, Verification, and Service Application

The component is offered in used condition, allowing for economical repair of the lubrication system while maintaining the original manufacturer's specifications. This type of component is particularly useful for:

• overhauling or replacing the oil pump in the OM646 engine,
• repairs after damage to the oil sump or contamination of the lubrication system,
• servicing diesel units where oil pressure drops have occurred.

Using an original suction pipe helps to reduce the risk of problems typical for ill-fitting aftermarket parts, such as leaks at connections, flow turbulence, or difficult system bleeding.

Benefits of Choosing an Original Mercedes Component

Selecting the correct oil pump manifold suction pipe directly impacts the durability of the diesel engine. By choosing an original component designed for the Mercedes C-Class W203 with the OM646 unit, you gain:

• guaranteed fit for the lubrication system – compliance with the factory Diesel engine construction,
• stable oil intake by the pump across the entire RPM range,
• reduced risk of moving parts seizing with properly maintained oil levels,
• easier installation due to preserved original geometry and mounting points.

If you are planning comprehensive engine area repairs or upgrades for your Mercedes and need other parts from the same group, such as suction pipes, pump housings, or mounting elements, check the available parts in the Mercedes Oil Pumps and Parts category.

Technical Support and Service Knowledge

When planning a larger scope of service work, it is advisable to familiarize yourself with the principles of assembling used original components and selecting them for a specific engine version. Practical tips for one-stop-shop purchases and avoiding problematic aftermarket parts can be found in the article Comprehensive Supply: From Engine to the Smallest Clip – How to Assemble Used Car Parts in One Place?.

If you are interested in a broader context of operating and servicing Mercedes engine units, including selecting engine accessories and preventing typical faults, the guide dedicated to C-Class and E-Class models may also be helpful: Reliability Under the Star – How to Care for Engine Accessories in Popular Mercedes-Benz C-Class and E-Class Models?.