{"product_id":"doser-injector-4394644-fit-for-cummins-engine-b4-5-d4-0-f3-8-f4-5","title":"Doser Injector 4394644 Fit for Cummins Engine B4.5 D4.0 F3.8 F4.5","description":"\u003cp\u003eThe DEF doser injector is a critical component of the Selective Catalytic Reduction (SCR) aftertreatment system on Tier 4 Final \/ Stage V Cummins engines. It precisely meters and injects Diesel Exhaust Fluid (DEF\/AdBlue) into the exhaust stream to reduce NOx emissions to regulatory compliance levels. When it fails, you'll trigger SCR fault codes, DEF system warnings, and — if left unresolved — engine derate or shutdown. This is a \u003cstrong\u003enew original\u003c\/strong\u003e Cummins doser injector covering part numbers \u003cstrong\u003e4394644\u003c\/strong\u003e and \u003cstrong\u003e0444B05704\u003c\/strong\u003e, engineered to restore precise DEF dosing and keep your aftertreatment system in full compliance.\u003c\/p\u003e\n\n\u003ch3\u003e✅ Direct-Fit Compatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCummins Engines:\u003c\/strong\u003e B4.5, D4.0, F3.8, F4.5\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEmissions Platforms:\u003c\/strong\u003e CM2350 B146C, CM2620 B158B, CM2620 B180B, CM2620 D103B\u003c\/li\u003e\n  \u003cli\u003eDirect replacement — no modifications required\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e🔧 Product Highlights\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNew Original Cummins OEM:\u003c\/strong\u003e Genuine factory unit — not aftermarket or remanufactured\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecise DEF Dosing:\u003c\/strong\u003e Correct spray pattern and flow rate for accurate SCR catalyst dosing and NOx reduction\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClears SCR Fault Codes:\u003c\/strong\u003e Restores proper aftertreatment system operation and eliminates DEF-related engine derate risk\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDirect Drop-In Fit:\u003c\/strong\u003e No modifications required; installs like the original\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual Cross-Reference:\u003c\/strong\u003e Covers both 4394644 and 0444B05704 (Bosch) for confirmed fitment\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEmissions Compliance:\u003c\/strong\u003e Maintains Tier 4 Final \/ Stage V regulatory compliance for your equipment\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e📦 What's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × New Original Doser Injector (4394644 \/ 0444B05704)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e🔑 Key Specs\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePart Numbers:\u003c\/strong\u003e 4394644, 0444B05704\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e New Original (OEM)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Cummins B4.5 \/ D4.0 \/ F3.8 \/ F4.5 engines (CM2350 \/ CM2620 platforms)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSystem:\u003c\/strong\u003e SCR Aftertreatment \/ DEF Dosing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003ePlease verify your engine serial number, emissions platform, and existing part number before ordering. Contact us for fitment confirmation if needed.\u003c\/em\u003e\u003c\/p\u003e","brand":"Fuel Parts Depot","offers":[{"title":"Default Title","offer_id":47103695290524,"sku":"4394644","price":219.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0705\/7843\/8300\/files\/doser-injector-4394644-fit-for-cummins-engine-b45-d40-f38-f45-7235187.png?v=1782318977","url":"https:\/\/fuelpartsdepot.com\/en-gb\/products\/doser-injector-4394644-fit-for-cummins-engine-b4-5-d4-0-f3-8-f4-5","provider":"Fuel Parts Depot","version":"1.0","type":"link"}