The Mercedes W221 AdBlue Injector is a component of the AdBlue dosing system in Mercedes S-Class W221 vehicles, responsible for precisely delivering the reducing agent to the exhaust system. A used injector nozzle from this series allows for the restoration of proper SCR system operation, reduction of nitrogen oxide emissions, and elimination of errors related to incorrect AdBlue dosing.
Specifications and technical data
- SKU: A1644900513
- Mark: Mercedes (Genuine OE)
- Condition: Used
- OEM Part Number: A1644900513
- Substitutable numbers: A1644900513, A 164 490 05 13, EM
- Category: Fuel Injectors
Technical Characteristics of the Mercedes W221 AdBlue Injector
The AdBlue injector for Mercedes W221 belongs to the injector nozzles category and is factory-designed to work with the selective catalytic reduction system in diesel engines. It is responsible for atomizing the urea solution into the exhaust stream in a way that ensures stable operation of the SCR catalyst and compliance with the emission standards set for this vehicle generation.
The precise geometry of the nozzle and its compatibility with the factory engine control unit allow for maintaining the correct injection pressure and timing, which translates to:
- stable operation of the exhaust gas purification system without sudden drops in NOx reduction efficiency,
- proper interaction with exhaust gas temperature and composition sensors,
- reduced risk of AdBlue crystallization around the injection point due to appropriate atomization.
Benefits of Using an Original Mercedes Injector Nozzle
Choosing an original injector nozzle designed for the AdBlue system in the Mercedes W221 primarily offers guaranteed fit for the factory installation. The component is structurally compliant with the vehicle manufacturer's requirements, which facilitates installation and minimizes the risk of software compatibility issues with the engine control unit.
Key advantages of using this injector in the SCR system include:
- maintaining correct exhaust gas composition and efficient SCR catalyst operation,
- reduced risk of the vehicle entering limp mode due to AdBlue dosing errors,
- stable engine operation while maintaining factory emission parameters,
- no need for installation modifications – the component is designed for the factory Mercedes system.
Component Condition and Service Application
The offered AdBlue injector is a used part, which represents a cost-effective service solution for users seeking a technically compatible component at a reasonable price. A used injector nozzle from the original Mercedes production line allows for maintaining the factory performance characteristics of the SCR system without the need for cheaper aftermarket alternatives with uncertain parameters.
This solution is particularly useful in situations where:
- AdBlue system errors related to incorrect dosing or lack of injection occur,
- a leak or mechanical damage to the nozzle has been identified,
- the component needs replacement as part of exhaust system repairs following mechanical intervention or corrosion.
Technical Support and Knowledge of Injection Systems
When diagnosing problems with the injection system in diesel engines, it is advisable to use reliable sources of information. A detailed discussion of the symptoms and consequences of improper injector operation can be found in the article: Diesel Injector Failures – How to Recognize Them and What Their Neglect Entails. This will help you better assess whether replacing the AdBlue injector nozzle is the only necessary service action, or if the system requires broader diagnostics.
If you are considering a choice between an original used part and an aftermarket alternative, a practical guide may also be helpful: 5 Reasons Why a Used OEM Part is a Better Choice Than an Aftermarket Replacement. The criteria presented there will facilitate your decision-making when planning AdBlue system repairs.
Other Mercedes Injector Nozzles
If you are looking for other injector nozzles for Mercedes, check out the Mercedes injector nozzles available in our store to select a component suitable for your specific model and engine version.
