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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No Hidden Charges Upon Arrival
Compatibility Information
| Make | Fits Cummins |
|---|---|
| Model | B6 |
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.
The Right Part, the First Time
Engine and hydraulic parts matched by part number, trusted by fleets, contractors and repair shops worldwide.
50,000+
Customers including fleets, workshops and machinery owners
100K+
Parts in stock and ready to ship
65+
Countries served worldwide
Since 2019
Supplying heavy equipment parts to the trade
Frequently Asked Questions
What is your return policy?
We accept returns within 60 days of delivery for unused parts in original packaging. To initiate a return, please submit your request through our return portal. Return shipping costs for non-defective items are the buyer's responsibility.
Can I cancel my order?
You may request a cancellation before your order has been dispatched. Once an order has been fulfilled and shipped, it cannot be cancelled — standard return terms will apply instead. Please contact us as soon as possible if you need to cancel.
What payment methods do you accept?
We accept all major credit and debit cards including Visa, Mastercard, and American Express. We also support PayPal, Apple Pay, and Google Pay at checkout. For B2B and trade customers, bank transfer and net payment terms may be available upon account approval — please contact us to discuss your requirements.
How long will delivery take?
Estimated delivery timeframes are displayed on most product pages and all tool listings. For parts without a displayed timeframe, standard delivery to US addresses is typically 5–10 business days from dispatch, depending on your location and the origin warehouse. Express shipping options may be available at checkout.
Will I be charged import tax or customs duties?
No. US customers are not charged any import fees or customs duties on their orders. The price you see is what you pay — there are no hidden charges added upon delivery.
How do I find out the shipping cost for my order?
You can get an estimated shipping cost directly on the cart page — just add your parts to the cart and enter your delivery zip code to see available shipping options and rates. For large or heavy orders requiring a freight quote, please contact us directly with your parts list and delivery zip code.
Do you offer trade accounts for US buyers?
Yes. US trade customers can apply for a B2B account to access volume pricing, bulk quotation, team invite and dedicated account support. Contact us directly to get started.
