24V Urea DEF Injector Doser Pump 4377650 Fits for Cummins Engine B6.7 ISL9 QSB6.7 QSG12 X12 X15 QSK60 Replacement
24V Urea DEF Injector Doser Pump 4377650 Fits for Cummins Engine B6.7 ISL9 QSB6.7 QSG12 X12 X15 QSK60 Replacement is backordered and will ship as soon as it is back in stock.
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Powering 10,000+ Commercial Fleets
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One Year Warranty
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Easy 60-day Return
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Expert support & Fitment Guarantee
Description
Description
24V Urea DEF Injector Doser Pump 4377650 – Premium Replacement for Cummins Engines
High-performance aftermarket 24V urea DEF injector doser pump engineered for precise diesel exhaust fluid delivery in Cummins diesel engines. Precision-manufactured for drop-in compatibility and reliable SCR aftertreatment performance in demanding on-highway and industrial environments.
Technical Specifications
Fits Part Numbers: 5578983, 4377649, 4377650, A050S599
Condition: New, aftermarket replacement
Function: 24V DEF urea dosing pump for SCR aftertreatment system
Verified Engine Compatibility
Fits Cummins Engines:
- B6.7 CM2350 B121B, B6.7 CM2350 B136C
- ISL9 CM2350 L111
- ISX15 CM2350 X101
- L9 CM2350 L116B, L9 CM2350 L120C, L9 CM2350 L133C
- QSB6.7 CM850, QSB6.7 CM2850
- QSG12 CM2350 G110
- QSK60 CM850 MCRS
- X12 CM2350 G110, X12 CM2350 X119B
- X15 CM2350 X114B, X15 CM2350 X116B, X15 CM2350 X123B, X15 CM2350 X129B
- X15 CM2450 X124B
Why Choose This DEF Doser Pump
The DEF injector doser pump is a critical component of your engine's SCR aftertreatment system, precisely metering and injecting urea solution into the exhaust stream to reduce NOx emissions and maintain regulatory compliance. This replacement unit delivers:
- Reliable DEF dosing performance – Consistent and precise urea injection for optimal SCR system operation
- Exact-fit installation – Direct replacement with correct 24V specifications and connector configuration
- Durable construction – Built to withstand continuous operation in heavy-duty diesel aftertreatment environments
- Cost-effective solution – Premium aftermarket quality at a fraction of dealer pricing
Package Contents
1 × 24V Urea DEF Injector Doser Pump (4377650)
Essential for engine maintenance, DEF system repair, and preventive service. Keep your Cummins B6.7, L9, X12, X15, and QSK60 engines compliant and operating efficiently on every route and job site.
1 Year Warranty
1 Year Warranty
Fab Heavy Parts is excited to offer a 12-month warranty on all new replacement/aftermarket parts starting from your original purchase date.
Enjoy peace of mind with Fab Heavy Parts!
For more warranty details, please check out our warranty policy.
Fast Delivery
Fast Delivery
Estimated delivery time 3-6 workdays
No Core Charge
No Core Charge
We don't have a core charge for any products.
Frequently Asked Questions
Shipping and Delivery
What countries do you ship to?
What countries do you ship to?
We can ship to these countries:
Indonesia, Japan, Malaysia, Philippines, Singapore, South Korea, Thailand, Vietnam
United States
Belgium, San Marino, Italy, Spain, Netherlands, France, Germany, Finland, Austria, Denmark, Ireland, Luxembourg, Monaco, Norway, Sweden, Switzerland, Portugal, Poland, Hungary, Canada, Estonia, Australia, Mexico, New Zealand, Bulgaria, Croatia, Cyprus, Czechia, Greece, Greenland, Iceland, Liechtenstein, Lithuania, Malta, Romania, Russia, Slovakia, Slovenia, Latvia, Turkey, United Kingdom
How long will it take to receive my order?
How long will it take to receive my order?
Estimated delivery time to USA: 3-6 workdays;
Estimated delivery time to Canada, Mexico: 4-7 workdays;
Estimated delivery time to Australia: 4-7 workdays;
Estimated delivery time to European countries: 4-7 workdays;
Estimated delivery time to Asian countries: 3-5 workdays.
Returns and Refunds
How do I return a product?
How do I return a product?
Our return policy lasts 60 days. If 60 days have gone by since the delivery, unfortunately, we can’t offer you a refund or exchange.
To be eligible for a return, your item must be unused, not installed, clean and in the same condition that you received it. Shrink wrapping must not be broken. It must also be in the original packaging.
To complete your return, we require a receipt or proof of purchase.
Please do not send your purchase back to the manufacturer.
Steps of Returning Products to Fab Heavy Parts
1. Request returns in seconds at our return portal.
2. Fill in the email address you left with the order & the order number to start the return. Note: a correct order number format starts with a # hashtag
3. Select the items you wish to return and choose the return reason and upload photos of the received package.
Then, Fab Heavy Parts receives your return request and starts to process your return request. We may contact you for more details.
Steps after the approval of your return request:
1. A Return label will be sent to you via email. Print out the return label, place it on the parcel, and take it to the drop-off point. Make sure you properly pack the product for return if it’s returnable.
2. A refund of the original purchase price will be issued.
Any questions about returning products, please feel free to contact us at info@fabheavy.com
How long will it take to receive my refund?
How long will it take to receive my refund?
Once your return is received and inspected, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund.If you are approved, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment within 3-10 business days.
Payment Methods
What kind of payment methods do you accept?
What kind of payment methods do you accept?
We accept all major credit cards, PayPal, Google Pay, Apply Pay, Shop Pay, debit cards.
If you prefer offline payment, please contact us to get our bank transfer details.
Taxes or duties
Will I receive customs/import duties?
Will I receive customs/import duties?
For orders shipping to the United States, our price includes the import fees. The receiver/buyer doesn't need to pay any extra customs taxes, or duties for their packages. For orders shipping to non-US countries, please check our policy here.
