Mercedes-Benz DEF Pump
Mercedes-Benz DEF pumps are essential components in SCR (Selective Catalytic Reduction) systems used on modern diesel engines. The pump moves Diesel Exhaust Fluid from the DEF tank to the dosing module where it is injected into the exhaust stream to reduce NOx emissions. At Advanced Truck Parts, we supply Mercedes-Benz DEF pumps designed for reliable operation in commercial and fleet diesel applications.
Click to view more
Mercedes-Benz DEF Pumps for SCR Aftertreatment Systems
SCR-equipped diesel engines rely on a DEF pump to deliver Diesel Exhaust Fluid at the proper pressure to the dosing injector. Consistent DEF delivery is necessary for emissions compliance and helps prevent warning lights or engine derate conditions.
Common Mercedes-Benz Engine Applications
Mercedes-Benz DEF pumps are commonly used across several OM-series diesel engine platforms found in commercial vehicles and fleet applications.
- Mercedes-Benz OM471 diesel engines
- Mercedes-Benz OM472 diesel engines
- Mercedes-Benz OM473 diesel engines
- Heavy-duty trucks and fleet vehicles
Each DEF pump is engineered to match the pressure and electronic control requirements used in the SCR aftertreatment system.
Common DEF Pump Failure Symptoms
- SCR or emissions system warning lights
- Low DEF pressure fault codes
- Engine derate or reduced power
- DEF dosing system errors
- Crystallized DEF buildup or pump blockage
DEF pump failures may occur due to contamination, crystallized DEF deposits, electrical issues, or internal wear. Replacing a faulty pump helps restore proper SCR system operation.
Verify Fitment Before You Buy
DEF pumps vary depending on engine configuration and model year. To confirm compatibility before ordering, provide:
- Vehicle or equipment model
- Engine model (OM471, OM472, OM473)
- Current DEF pump part number
- Photos of the pump or connectors if available
This information helps ensure the correct Mercedes-Benz DEF pump is selected for your vehicle.
Why Buy Mercedes-Benz DEF Pumps from Advanced Truck Parts?
- Fitment verification before purchase
- Reliable replacement aftertreatment components
- Fast shipping to minimize vehicle downtime
- Support for fleets, repair shops, and diesel owners
- Competitive pricing on SCR system parts
