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
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.
Frequently Asked Questions
Do you ship to the UK?
Yes, we ship to mainland UK, Scotland, Wales, and Northern Ireland. Shipping rates and estimated delivery times are displayed at checkout.
Will I be charged import duties or VAT?
Our prices do not include VAT or import duties. UK and European customers are responsible for any applicable import taxes, VAT, and customs fees charged upon entry into their country. These charges vary depending on the commodity code, order value, and destination country. We recommend checking with your local customs authority or HMRC (for UK customers) before placing your order.
How long will delivery take to the UK?
Standard delivery to UK addresses is typically 4–7 business days from dispatch. Express options may be available at checkout. Customs clearance can add 1–3 additional business days in some cases.
Are your parts compatible with UK and European specifications?
Many of our engine, hydraulic, and powertrain components are compatible with EU and UK-market machines. Please verify the part number against your OEM manual or machine serial plate before ordering. Contact us with your machine make, model, and serial number if you need fitment confirmation.
What currency will I be charged in?
UK customers are billed in GBP (£).
What is your returns policy for UK orders?
We accept returns within 30 days of delivery for unused parts in original packaging. UK customers are protected under the Consumer Contracts Regulations 2013, which grants a 14-day right to cancel an order before it has been dispatched. Once an order has been fulfilled and shipped, standard return terms apply. Return shipping costs for non-defective items are the buyer's responsibility.
How do I verify a part number before ordering?
Each listing includes part numbers and compatible machine models. Cross-reference with your OEM workshop manual, or contact our technical team via the contact form with your machine make, model, year, and serial number.
Do you offer trade accounts for UK buyers?
Yes. UK trade customers can apply for a B2B account to access volume pricing and dedicated account support.
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 (BACS) and net payment terms may be available upon account approval — please contact us to discuss your requirements.
