The Cummins Doser Injector 5305254 is a precision-engineered component designed to accurately inject Diesel Exhaust Fluid (DEF) into the SCR (Selective Catalytic Reduction) system of Cummins engines. Compatible with B6.7, 4B 3.9L, and 6B engines, this doser injector ensures efficient NOx reduction, emissions compliance, and optimal engine operation.
Built to OEM standards, the 5305254 doser injector delivers precise DEF flow to maintain proper chemical conversion in the SCR system, reducing nitrogen oxides into harmless nitrogen and water vapor. Constructed with high-quality, corrosion-resistant materials, it withstands harsh operating conditions, high exhaust temperatures, and continuous duty cycles.
A malfunctioning doser injector can cause SCR faults, check engine lights, poor emissions performance, and engine derate. Replacing it with the Cummins 5305254 doser injector restores SCR efficiency, protects exhaust aftertreatment components, and maintains regulatory compliance. Ideal for fleet maintenance, emissions system repair, and preventive servicing of diesel engines.
✔ PRODUCT FEATURES & COMPONENTS
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OEM-quality DEF doser injector
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Cummins part number: 5305254
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Precise urea dosing for SCR systems
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Corrosion-resistant and durable construction
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Maintains SCR efficiency and NOx reduction
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Direct-fit replacement for Cummins engines
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Ensures reliable emissions system operation
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Ideal for maintenance and preventive replacement
✅ ENGINE COMPATIBILITY
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Cummins B6.7
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Cummins 4B 3.9L
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Cummins 6B
✅ VEHICLE & EQUIPMENT APPLICATIONS
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Heavy-duty trucks and buses
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Construction and industrial equipment
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Agricultural machinery
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Off-highway vehicles with SCR systems
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Fleet vehicles requiring emissions compliance
✅ KEY FEATURES & BENEFITS
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Accurate DEF injection for SCR efficiency
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Reduces engine derate and fault codes
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OEM-grade fit and durability
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Protects SCR catalysts and exhaust components
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Long service life under high-temperature conditions
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Restores emissions system performance
Which engines use Cummins doser injector 5305254?
Cummins doser injector 5305254 fits B6.7, 4B 3.9L, and 6B engines with SCR systems.
What is the purpose of a DEF doser injector?
It injects precise amounts of Diesel Exhaust Fluid into the exhaust stream to enable SCR systems to reduce NOx emissions.
What happens if the doser injector fails?
A failed doser injector can cause SCR faults, check engine lights, engine derate, and poor emissions performance.
Is 5305254 an OEM-quality replacement?
Yes, Cummins 5305254 meets OEM specifications for fit, performance, and emissions system reliability.
