Description
Product Overview
Protect your engine with the Air Filter AF25551 For Fleetguard RS3704 - P821575 - CA9550 . Engineered for superior filtration efficiency, this direct replacement filter traps harmful contaminants while maintaining optimal airflow. Designed to meet or exceed Fleetguard OEM specifications at $25.99.
Key Features
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High Filtration Efficiency: Multi-layer media traps 99%+ of harmful contaminants
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Optimal Airflow: Engineered pleat design maximizes airflow while maintaining filtration
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OEM Cross-Reference: Direct replacement for Fleetguard, Donaldson, and OEM filters
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Heavy-Duty Construction: Built for diesel engine demands in commercial and industrial use
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Extended Service Life: Premium media provides longer service intervals under normal conditions
Compatibility
The following table lists confirmed compatible applications. Please verify your vehicle's year, make, model, and engine before ordering.
| Make |
Model |
Year Range |
Notes |
| Fleetguard |
— |
Various |
Verify fitment |
Specifications
| Specification |
Value |
| Brand |
iFJF |
| Part Number |
M131802, RS3704, AF25551, P821575 |
| Cross-Reference |
Fleetguard RS3704, P821575, CA9550 |
| Type |
Engine Air Filter |
| Media |
Synthetic/Cellulose Blend |
| Application |
Diesel Engine Air Intake |
Why Choose iFJF
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OEM-Quality Standards: Every iFJF product is manufactured to meet or exceed OEM specifications for fit, durability, and performance.
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Rigorous Quality Control: Each component undergoes thorough inspection before shipping to ensure you receive a flawless product.
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Direct Savings: By selling factory-direct, we eliminate middleman markups — passing significant savings to you compared to dealership pricing.
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US-Based Support: Our customer service team is ready to help with fitment questions, installation guidance, and order support.
Installation Tips
DIY-Friendly: Air filter replacement is one of the easiest maintenance tasks. Locate the air filter housing, unclip the cover, remove the old filter, and drop in the new one. Most installations take under 5 minutes.
Service Interval: Inspect air filters every 15,000 miles or 12 months, whichever comes first. Replace more frequently in dusty or off-road conditions. A clean air filter improves fuel economy and engine performance.
Frequently Asked Questions
Q: Will this fit my engine?
A: This air filter is a direct cross-reference for Fleetguard RS3704, P821575, and CA9550. It fits various diesel engine applications. Please verify your existing filter part number before ordering.
Q: How does this compare to Fleetguard OEM?
A: Our filter meets or exceeds Fleetguard filtration specifications for particle efficiency and dust-holding capacity. The same multi-layer synthetic media construction ensures reliable engine protection.
Q: How often should I replace the air filter?
A: Under normal highway conditions, replace every 30,000-45,000 miles or annually. For commercial, off-road, or dusty conditions, inspect every 15,000 miles and replace as needed. A restricted air filter reduces fuel economy and power.
Q: Is this a genuine Fleetguard product?
A: This is a premium aftermarket replacement filter that cross-references with the Fleetguard part numbers listed. It is manufactured to equivalent specifications and performance standards.
