On-Demand DEF Precision: Cummins B6.7 / ISL / QSL DEF Doser Injector (2021–2024), OEM 5508582RX
What is it?
The Cummins DEF Doser Injector (OEM 5508582RX) is a vital component for post-2021 engines in the B6.7, ISL, and QSL series. It accurately meters Diesel Exhaust Fluid (DEF) into the aftertreatment stream, ensuring the right dosage for clean operation and system consistency.
Why opt for this OEM DEF Doser Injector?
This injector is perfectly matched to Cummins ECM settings and DEF management standards, installing directly without calibration needs. Choosing OEM ensures reliable metering, avoiding dosing faults, SCR system alerts, or limp-mode activation that can arise with aftermarket parts.
Key Benefits
✅ Direct-fit for Cummins B6.7, ISL, and QSL engines (2021–2024)
✅ Maintains accurate DEF delivery for system stability
✅ Incorporates compensating mechanisms to uphold flow consistency
✅ Designed for durability under heat, vibration, and chemical exposure
✅ Helps minimize DEF system faults and maintain uptime
Applications
Ideal for newer trucks, industrial units, and generators powered by Cummins B6.7, ISL, or QSL engines within the 2021–2024 production range. Delivers dependable DEF control for demanding drive cycles, variable workloads, and diverse operating environments.
Installation Notes
Start by shutting down the engine and safely relieving DEF system pressure. Remove the old injector and prepare the port by clearing debris. Install the new OEM unit using the correct sealing washer and torque specifications. Once installed, power the system on, clear any service codes, and confirm accurate dosing and sensor feedback via diagnostic scan.
Final Thoughts
If your vehicle with a Cummins B6.7, ISL, or QSL engine built between 2021 and 2024 is showing dosing irregularities, warning codes, or reduced DEF system performance, this OEM DEF Doser Injector is your solution. It restores smooth DEF delivery and system integrity—available now at Tamerx.