Volvo/Mack D13/MP8 DEF Head Unit

Emissions Control for Volvo/Mack – OEM DEF Head Unit (24382877)

What is it?
The OEM 24382877 DEF Head Unit is the factory header assembly for Volvo and Mack engines (specifically D13 and MP8 platforms) equipped with DEF systems. It mounts on top of the DEF (Diesel Exhaust Fluid) tank and houses sensors that monitor fluid level, temperature, and support the control logic for SCR (Selective Catalytic Reduction) operation.

Why choose this OEM DEF Head Unit?
Manufactured to Volvo/Mack specifications, this unit ensures proper sensor calibration, reliable sealing, and compatibility with diagnostics and control systems. Using the genuine component helps prevent DEF level errors, leaks, or false diagnostic codes that are common with inadequate aftermarket replacements.

Key Benefits
 ✅ Direct drop-in replacement for Volvo/Mack D13 / MP8 DEF systems
 ✅ Accurate monitoring of DEF fluid level and temperature
 ✅ Proper sealing to prevent leaks and contamination
 ✅ Full compatibility with factory SCR/ECU systems
 ✅ Durable construction suited for heavy-duty service

Applications
Ideal for Volvo and Mack trucks and chassis that run DEF-equipped D13 or MP8 engines—used in over-the-road, vocational, or regional haul operations where emissions compliance and DEF system accuracy are essential.

Installation Notes
Have a qualified technician perform the installation. First, depressurize or isolate the DEF system to prevent fluid spill. Clean the mounting surface and inspect for damage. Replace any worn O‑rings or seals. Install the head unit and torque to OEM specifications. After installation, confirm sensor outputs, check for leaks, and clear any DEF or SCR fault codes with diagnostics to ensure proper operation.

Final Thoughts
If your Volvo or Mack engine is giving DEF-level warnings, erratic sensor readings, or emissions faults, the OEM 24382877 DEF Head Unit delivers accurate monitoring and restores reliable SCR system function—keeping your vehicle compliant and performing.