AdBlue Dosing Valve – 1644900513 | Mercedes Sprinter DEF Injection Nozzle

SKU: 1644900513 - qty 1

Ensure your Mercedes Sprinter’s SCR (Selective Catalytic Reduction) emissions system functions properly with the AdBlue Dosing Valve – part #1644900513. This precision-engineered injector, often called a DEF (Diesel Exhaust Fluid) dosing valve or injector nozzle, delivers the correct amount of AdBlue (aqueous urea solution) into the exhaust stream. Proper dosing is essential for reducing NOₓ emissions, meeting emissions regulations, and maintaining engine performance. A faulty or clogged dosing valve can trigger DEF system warnings, reduced power, or failed emissions tests, so replacing worn or damaged units helps restore smooth, legal diesel operation. 

✔ OEM-Style DEF Injection Nozzle

• Designed to meet Mercedes-Benz 1644900513 / A1644900513 specifications — the direct-fit solution for your Sprinter’s SCR system. 

• Also cross-referenced to Bosch DEF modules (e.g., Bosch 0444021024) used in various Bluetec diesel applications. 

✔ Critical for Emissions Control

• Injects precise amounts of AdBlue into the exhaust, enabling the catalytic converter to chemically reduce harmful nitrogen oxides (NOₓ). 

• Helps prevent inefficient dosing, DEF faults, and SCR system errors that can lead to dashboard warning lights or degraded performance.

✔ Built for Durability & Easy Installation

• Manufactured for automotive use with robust materials suited for high-temperature exhaust environments.

• Installs directly into the dosing system — a common DIY or professional replacement when servicing the AdBlue injector.

📌 Fitment Reminder: Always verify compatibility with your Sprinter’s VIN, model year, and engine type — emission components are often specific to vehicle configurations and emissions standards.