Mercedes W166 Fuel Tank AdBlue Pump ML250 BlueTEC 2.1 Diesel 651960 A1664705501

Mercedes W166 Fuel Tank AdBlue Pump ML250 BlueTEC 2.1 Diesel is a specialized component of the fuel supply system in diesel vehicles, responsible for the precise delivery of AdBlue solution to the exhaust gas treatment system. Thanks to its factory-fit for the 2.1 Diesel unit and integration with the tank system, this part allows for maintaining the proper operation of the SCR system and stable emission parameters. Choosing an original component from dismantling is a sensible way to restore the system's efficiency while maintaining compliance with Mercedes factory specifications.

Specifications and technical data

• SKU: A1664705501-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1664705501
• Substitutable numbers: A1664706001, A 166 470 60 01, A1664705501, A 166 470 55 01
• Fuel type: Diesel
• Part type: Fuel Tank
• Category: Fuel Tanks & Filler Necks

Purpose and function in the fuel supply system

The described AdBlue pump works with the diesel engine in Mercedes SUV models from the W166 series, in the ML 250 BlueTEC version. It is integrated with the emission reduction system tank and is responsible for transporting the urea solution to the exhaust system, which enables the effective operation of the SCR system. A properly functioning pump ensures stable pressure and appropriate medium flow, which translates into the correct operation of the engine control unit and the absence of errors related to exhaust emissions.

Construction and fitment for the Mercedes system

The element belongs to the Fuel tanks and filler pipes group, working with the fuel supply system in Mercedes vehicles. The pump's construction is prepared for installation in factory mounting points, with appropriate routing of hoses and connectors. This makes it possible to maintain the original geometry of the system, which facilitates installation and reduces the risk of leaks or stress in the lines. The pump is designed to work with Diesel fuel, which means it is compatible with the operating characteristics of diesel units and their exhaust gas treatment systems. Using an original solution allows for maintaining the consistency of the entire fuel supply and exhaust system, without the need for adaptation or modification of the installation.

Benefits of using an original AdBlue pump

Choosing an original AdBlue pump from dismantling brings a number of practical technical benefits:

• maintaining the factory operating characteristics of the emission reduction system in the diesel engine,
• proper cooperation with the vehicle's electronics and diagnostic system,
• appropriate fitment to the tank and AdBlue system lines,
• reduced risk of problems with solution dosing and the appearance of errors on the dashboard. Thanks to this, the installation of such an element is a good solution for repairs of the fuel supply system in Mercedes vehicles with a diesel engine, where both durability and compliance with emission requirements are important.

Condition, origin, and practical application

The AdBlue pump comes from a Mercedes vehicle and is offered as a used part, which allows for reducing repair costs while maintaining the original construction. This type of component is particularly useful in situations where the vehicle experiences problems with AdBlue solution dosing, SCR system errors, or power limitation messages related to the exhaust gas treatment system. Using a factory element from the same model group increases the chance of seamless integration with the existing installation. If you want to better understand what to pay attention to when selecting fuel supply system elements from the secondary market, the guide on selecting components from dismantling will be helpful – check the article Fuel dosing problems – how to safely choose a used pump and fuel supply system elements to plan your repair consciously.

Support with selection and system expansion

If you are planning a comprehensive repair or modernization of the fuel supply and tank area in your Mercedes and need other elements from the same group, such as additional hose sections, mounting elements, or components working with the tank, check the available parts in the Mercedes Fuel tanks and filler pipes category. When planning a repair, it is also worth considering the impact of using original used elements on the vehicle's subsequent value – you can find more on this topic in the guide original used parts and car resale price, which helps to choose solutions that are beneficial both technically and economically.