When you rely on heavy-duty machines or equipment with Cummins motors under the hood, the emissions aftertreatment system must operate flawlessly. One component that is easy to overlook until trouble strikes is the DEF (Diesel Exhaust Fluid) head unit. For Doosan Bobcat Cummins applications, the DEF Head Unit (OEM 46854881, Tamerx part 4310-22-2) is the crucial link that monitors, controls, and ensures the integrity of your DEF circuit. A failure in this unit can lead to fault codes, derates, or even system shutdowns—none of which are acceptable in the middle of a job.
-
Tracks DEF fluid level, temperature, concentration, providing real-time data to the engine control module
-
Regulates precise dosing of urea into the exhaust stream so the SCR (Selective Catalytic Reduction) system can convert NOx emissions
-
Engineered to OEM 46854881 standards to ensure drop-in compatibility with Doosan Bobcat Cummins systems
-
Helps prevent emissions warnings, fault codes, and engine derates that arise when sensor signals go awry
-
Constructed to resist harsh operating conditions—vibration, thermal cycling, and exposure to DEF’s corrosive nature
-
Designed for efficient replacement to cut downtime and get your machine back to work
-
Covered by a 1,000,000-mile / 1-year warranty when properly installed
Don’t wait until your emissions system warns you with error codes or compromised performance. Installing the OEM 46854881 Doosan Bobcat Cummins DEF Head Unit restores system accuracy, protects against faults, and ensures your machine remains emissions-compliant during every operation. Keep this component on your maintenance radar—you’ll thank yourself when issues are avoided before they begin.