OMALWAYS 21335900 Urea Pump 0444042012 85003864 21577507 21577511 21332701

( Brand: Omalways ), ( Manufacturer Part Number: 21335900 ), ( Ipn: 0444042012 ), ( Manufacturer Warranty: 3 Months ), ( Oe/oem Part Number: 21577507 0444042002 ), ( Type: Def Pump )

Review OMALWAYS Urea Def Pump Volvo Mack 12v fits D13

The **Omalways 21335900 Urea DEF Pump (Part Number: 85003864)** is a high-performance, precision-engineered auxiliary component designed exclusively for Volvo and Mack heavy-duty diesel engines equipped with Selective Catalytic Reduction (SCR) systems. This pump is specifically engineered to deliver a consistent and metered flow of **AdBlue (urea solution)** into the exhaust stream, ensuring optimal functionality of the SCR system while adhering to stringent emissions regulations such as EPA Tier 4, EU Stage V, and other global compliance standards. Built to integrate seamlessly with the **Volvo D13** and **Mack E7/E9** engine families (covering model numbers like **21577507, 21577511, and 21332701**), this pump is crafted from durable materials, including corrosion-resistant plastics and reinforced metal components, to withstand the harsh conditions of commercial trucking, construction, and off-road applications.

The **Omalways DEF Pump** operates with exceptional reliability, utilizing a robust diaphragm-driven mechanism that ensures precise dosing of urea solution without clogging or leakage. Its compact yet sturdy design allows for easy installation within the engine bay, minimizing space constraints while maintaining optimal accessibility for maintenance and diagnostics. The pump incorporates a self-priming feature, reducing the risk of airlocks and ensuring a steady supply of DEF to the SCR system, even under varying engine loads or temperature fluctuations. Additionally, it is equipped with a **low-DEF warning system**, alerting operators to refill the urea reservoir before depletion, thereby preventing potential engine shutdowns or damage to the SCR catalyst.

For enhanced durability, the pump is engineered with **sealed bearings and a reinforced motor assembly**, resistant to moisture, dust, and extreme temperatures critical factors in long-haul and heavy-duty operations. The **Omalways brand** guarantees compatibility with Volvo and Mack s proprietary DEF delivery systems, ensuring seamless integration with the engine s ECM (Engine Control Module) for accurate emissions monitoring and compliance tracking. Whether used in a **Volvo VNL, VNR, or Mack Granite ** truck, this pump plays a vital role in maintaining peak performance while adhering to the latest environmental standards, making it an indispensable upgrade for fleets prioritizing efficiency, longevity, and regulatory compliance.

### **Pros and Cons of buying a OMA (OEM Alternative) Urea DEF Pump (Part Numbers: 21335900, 85003864) for Volvo/Mack 12V D13 Engines (Part Numbers: 21577507, 21577511, 21332701)**

1. **Cost-Effective Alternative to OEM Parts**

- OMA (OEM Alternative) parts are typically priced significantly lower than genuine Volvo/Mack OEM components, making them an attractive option for budget-conscious operators.

- The urea DEF pump (21335900) is designed to be a direct replacement for the original parts (21577507, 21577511, 21332701), ensuring compatibility without requiring engine modifications.

2. **High Quality and Durability**

- OMA parts are manufactured to meet or exceed OEM specifications, using materials and engineering standards similar to those of original equipment.

- Many OMA components undergo rigorous testing to ensure reliability, reducing the risk of premature failure compared to aftermarket knockoffs.

3. **Wider Availability and Faster Shipping**

- OMA parts are often stocked by multiple distributors, making them easier to source quickly compared to OEM parts, which may have longer lead times.

- This can be particularly beneficial in emergency situations where a DEF pump failure could leave a vehicle or piece of equipment out of service.

4. **Compatibility with Aftermarket and OEM Systems**

- The OMA DEF pump is designed to integrate seamlessly with both OEM and aftermarket SCR (Selective Catalytic Reduction) systems, ensuring proper DEF injection and engine compliance with emissions regulations.

- It works with the standard DEF lines and connectors used in Volvo/Mack 12V D13 engines, avoiding the need for additional adapters or modifications.

5. **Warranty and Support**

- OMA parts often come with warranties (typically 12 24 months), providing some level of protection against defects. While not as extensive as OEM warranties, this can offer peace of mind.

- OMA maintains customer support and technical resources to assist with installation, troubleshooting, and compatibility questions.

6. **Environmental and Regulatory Compliance**

- Using a DEF pump that meets emissions standards ensures the engine continues to comply with EPA and EU regulations for diesel exhaust aftertreatment. This is critical for fleets operating in regulated environments.

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1. **Potential Quality Variability**

- While OMA parts are generally high-quality, there is a risk of encountering lower-quality counterfeit or generic alternatives masquerading as OMA products. Always purchase from authorized OMA distributors to avoid this issue.

- Some operators report minor differences in fit or finish compared to OEM parts, though these are usually negligible for performance.

2. **Limited OEM Warranty Coverage**

- If the vehicle or engine is still under an OEM warranty, installing non-OEM parts (even OMA) may void the warranty coverage for related components. This is a critical consideration for fleets relying on warranty protection.

- Some OMA warranties may not cover labor or installation issues, leaving the operator responsible for any additional costs.

3. **Brand Perception and Long-Term Reliability**

- Some operators or fleet managers may prefer OEM parts due to brand loyalty or concerns about the long-term reliability of OMA components, especially in high-stress applications (e.g., heavy-duty hauling, off-road use, or extreme environments).

- While OMA parts are designed for durability, they may not have the same track record as OEM parts in extreme or prolonged use.

4. **Potential for Higher Long-Term Costs**

- If the OMA DEF pump fails prematurely due to quality issues (though rare), replacement costs could offset the initial savings. However, this is uncommon with reputable OMA parts.

- Some operators may also face challenges finding OMA-specific technical support or spare parts for older models, though this is less likely with major OMA distributors.

5. **Installation Complexity**

- Replacing a DEF pump requires careful handling of DEF lines, electrical connections, and sometimes engine bay wiring. Improper installation can lead to leaks, electrical issues, or system malfunctions.

- While OMA parts are designed for easy replacement, inexperienced installers may encounter difficulties, potentially increasing labor costs.

6. **Limited Customization Options**

- OMA parts are designed as direct replacements and may not offer customization options (e.g., upgraded materials or performance enhancements) that some aftermarket or OEM upgrades provide.

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The OMA urea DEF pump (21335900) is a **strong, cost-effective alternative to OEM parts** for Volvo/Mack 12V D13 engines, offering high quality, compatibility, and faster availability without sacrificing performance. It is particularly well-suited for fleets or operators who prioritize affordability, quick turnaround times, and compliance with emissions regulations. However, potential drawbacks such as warranty concerns, brand perception, and the risk of counterfeit products must be carefully considered.

For most applications, **OMA parts are a reliable and practical choice**, especially when purchased from authorized distributors. If the vehicle is still under OEM warranty or if the operator has strict brand preferences, OEM parts may be preferable despite the higher cost.

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1. **Verify the Source:** Purchase the OMA DEF pump (21335900) exclusively from **authorized OMA distributors** or reputable dealers to ensure authenticity and quality. Avoid third-party sellers with no OMA affiliation.

2. **Check Warranty Coverage:** Confirm whether the OMA pump s warranty aligns with your fleet s maintenance policies and whether installing it could void existing OEM warranties.

3. **Consult Technical Resources:** Review OMA s technical documentation or consult with a Volvo/Mack-certified technician to ensure proper installation and compatibility with your specific engine configuration (21577507, 21577511, 21332701).

4. **Consider Long-Term Costs:** While OMA parts save upfront, factor in potential long-term reliability and support costs. For critical applications, a risk assessment may justify OEM parts.

5. **Installation Precision:** If replacing the pump yourself, follow OMA s installation guidelines meticulously to avoid leaks or electrical issues. For complex installations, hire a professional.

6. **Monitor Performance:** After installation, monitor the DEF system for proper function (e.g., DEF injection pressure, engine diagnostics) to ensure the pump is operating as intended.

**Final Verdict:** The OMA urea DEF pump is a **highly recommended choice** for most Volvo/Mack 12V D13 applications due to its balance of cost, quality, and performance. It is ideal for fleets seeking a reliable, OEM-compatible alternative without the premium price of original equipment. However, always prioritize quality sourcing and professional installation to maximize longevity and reliability.

Details:

Free shipping. For Volvo Mack 12V def pump 21577507. Brand new Def pump for Volvo Mack trucks, heavy duty, best quality. This module may also be referred to as a def pump, delivery module, urea injection diesel exhaust fluid Knox supply or .

This is 12V DEF UREA PUMP. Compatible with Volvo D13 Engine FH13 FH4 VNL Truck. 21332701-P02. Compatibility.

specifications intakefuelmotorcycle:

• for models: D13
• for makes: Volvo, Mack
• brand: Omalways
• mpn: 21335900
• ipn: 0444042012
• manufacturer warranty: 3 Months
• oe/oem part number: 21577507 0444042002
• type: Def Pump

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• rating: 100.0%
• # reviews: 1
• city: Hebron, Kentucky

offer intakefuelmotorcycle:

• best offers: True
• quantity: 5
• sold: 0
• started: March 26, 2026
• availability: In Stock
• options: Ship-to-home

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• carrier: UPS
• type: Fixed
• class: Standard
• cost: $0.00
• service: UPS Ground
• transit: 4-8 Days

returns intakefuelmotorcycle:

• time: 30 Days
• paid by: Seller
• policy: Returns Accepted

general intakefuelmotorcycle:

• condition: New
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