Volvo Mack D13, D11, MP8, MP7 Doser DEF Pump 2008-2018: OEM 21577511

Clean Power Starts Here – Volvo Mack Doser DEF Pump OEM 21577511

What is it?
The Volvo Mack Doser DEF Pump (OEM 21577511) is a genuine OEM component designed to deliver Diesel Exhaust Fluid (DEF) into the Selective Catalytic Reduction (SCR) system. Specifically made for D13, D11, MP8, and MP7 engines from 2008–2018, this pump plays a critical role in reducing nitrogen oxide (NOx) emissions and keeping your vehicle compliant with emissions regulations.

Why Choose Volvo Mack Doser DEF Pump – OEM 21577511
Built to Volvo and Mack’s strict specifications, the OEM 21577511 offers a direct-fit, durable solution for restoring proper DEF dosing. Faulty or inconsistent dosing can lead to engine derates and emissions faults—this OEM replacement helps you avoid costly downtime and ensures long-term emissions control performance.

Key Benefits:
✅ Accurate DEF Flow – Precisely meters DEF into the SCR system to reduce NOx emissions
✅ OEM-Engineered Reliability – Built for exact fit and long service life under demanding conditions
✅ Supports Emissions Compliance – Helps keep the system within EPA and CARB standards
✅ Reduces Downtime – Prevents derate conditions caused by DEF delivery failures
✅ Resistant to DEF Crystallization – Designed to withstand DEF-related corrosion and clogging

Applications
The OEM 21577511 DEF pump is designed for use with Volvo D13 and D11, as well as Mack MP8 and MP7 engines built between 2008 and 2018. These engines are widely found in Class 8 trucks across long-haul, regional, and vocational sectors—where proper DEF delivery is essential for EPA compliance and vehicle performance.

Installation Notes
Before installation, disconnect the battery and depressurize the DEF system. Remove the old pump and inspect hoses and fittings for DEF crystallization or wear. Install the new pump with new seals if necessary, and reconnect using proper torque specs. Clear any fault codes using diagnostic tools and verify system function.

Final Thoughts
A failing DEF pump can sideline your truck and create costly delays. Trust the Volvo Mack Doser DEF Pump OEM 21577511 to restore emissions system performance and get you back on the road. Now available at Tamerx—your source for dependable OEM diesel solutions.