Mercedes W221 Adblue Injector Nozzle Fuel Sensor A1644900513

Visual condition of the part

The product shows signs of use visible in the photos.

Mercedes W221 Adblue Injector Nozzle Fuel Sensor is an item from the Injector Nozzles category, designed for the exhaust emission reduction system in Mercedes vehicles. It enables precise delivery of AdBlue solution into the exhaust stream, which supports the efficient operation of the SCR system and helps maintain the vehicle's compliance with emission standards. Thanks to its factory origin from Mercedes, it provides a consistent service solution for W221 series models.

Specifications and technical data

• SKU: A1644900513-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1644900513
• Substitutable numbers: A1644900513, A 164 490 05 13
• Category: Fuel Injectors

Purpose and function in the AdBlue system

The presented AdBlue injector is responsible for the controlled dosing of the agent into the exhaust system, which is crucial for the proper operation of the SCR catalytic converter. Stable atomization of the urea solution allows for effective reduction of nitrogen oxides in the exhaust gases, thereby maintaining the correct operating parameters of the diesel engine and reducing the risk of the vehicle entering limp mode.

A properly functioning injector nozzle translates into:

• even atomization of AdBlue in the exhaust stream,
• correct operation of the SCR exhaust gas cleaning system,
• stability of engine power and torque,
• reduced risk of clogging exhaust system components.

Benefits of using an original injector nozzle

Using an injector dedicated to the Mercedes W221 ensures proper geometric fit and compatibility with factory controls. The appropriate spray pattern and flow parameters are tailored to the characteristics of this model's exhaust system, which limits the risk of engine control unit errors and incorrect readings from NOx sensors.

The main advantages of this solution include:

• consistency with the factory engine control unit software,
• maintaining the AdBlue dosing characteristics specified by the manufacturer,
• easier diagnostics in the event of potential SCR system faults,
• reducing the risk of costly repairs resulting from improper agent atomization.

Component condition and service application

The offered AdBlue injector is a used part, making it an attractive service alternative for drivers looking for a solution with a favorable price-to-functionality ratio. This type of component is particularly useful for exhaust emission system repairs when it is necessary to replace a worn or damaged injector nozzle, and the priority is to maintain compliance with the factory Mercedes configuration.

Choosing an original injector nozzle from this group allows for reducing the risk of adaptation problems and facilitates subsequent service and computer diagnostics in specialized workshops.

Technical support and fault diagnostics

When replacing the AdBlue injector in a Mercedes W221, it is recommended to perform a full diagnostic of the SCR system, including checking pressure, lines, sensors, and any errors stored in the controller. This allows confirming that the source of the problem was indeed the injector nozzle and not other system components.

If you want to better understand the symptoms of injector damage in diesel engines, their impact on engine performance, and the possible consequences of neglect, it is worth reading the article: Diesel injector faults – how to recognize them and the risks of neglecting them. This is a practical supplement to your knowledge when planning repairs to the fuel supply and exhaust gas cleaning system.

Related items from the Mercedes Injector Nozzles group

If you are planning a comprehensive repair or upgrade of the fuel supply and exhaust cleaning area in your Mercedes and need other components from the same group, such as additional injectors, dosing nozzles, or supplementary atomizing elements, check the available parts in the Mercedes Injector Nozzles category.