FS1003 FUEL WATER SEPARATOR FOR CUMMINS ISB ISC ISL ISM N14 10 MICRON

iFJF part No.: FJ-1003. Product Overview The FS1003 Fuel Water Separator is a high-performance filtration solution engineered for Cummins heavy-duty diesel engines. Designed to remove both free and emulsified water from diesel fuel, this 10-micron filter provides critical protection for modern high-pressure common rail (HPCR) fuel injection systems. Whether you're maintaining a fleet of trucks, agricultural equipment, or construction machinery, the FS1003 delivers the reliability and filtration efficiency your engine demands. Key Features Superior Water Separation Effectively removes water and contaminants from diesel fuel with 10-micron filtration media, protecting injectors and fuel pumps from catastrophic failure. Heavy-Duty Construction Built with industrial-grade materials designed to withstand high-pressure diesel fuel systems in heavy-duty truck applications. OEM Compatibility Direct replacement for Cummins FS1003 fuel water separator filters. Precision-engineered to match OEM specifications for fit and performance. Extended Service Life High-capacity filtration media provides longer service intervals compared to standard aftermarket filters, reducing downtime and maintenance costs. Fuel System Protection Removes both free and emulsified water from diesel fuel, preventing rust, corrosion, and microbial growth in your fuel system. Compatibility Make Model Engine Year Range Cummins ISB ISB6.7 6.7L Various Cummins ISC ISC8.3 8.3L Various Cummins ISL ISL8.9 / ISL9 8.9L / 9L Various Cummins ISM ISM11 11L Various Always verify fitment with your specific vehicle before ordering. Contact us with your engine serial number for confirmation. Technical Specifications Specification Value Part Number FS1003 Micron Rating 10 Micron SKU FJ-1003 Brand iFJF Condition New Cross References FS1003, Fleetguard FS1003, P564872, FF1003, FS1000 Why Choose iFJF Quality Guaranteed: Every product is manufactured to meet or exceed OEM specifications for fit, form, and function. Expert Support: Our team specializes in diesel aftermarket parts. We know these components inside and out. Fast Shipping: Orders ship within 1 business day from our US warehouses. Hassle-Free Returns: 30-day return policy. If it doesn't fit or perform, we'll make it right. Frequently Asked Questions Q: How often should I replace this fuel water separator? A: For heavy-duty diesel applications, we recommend replacing the FS1003 fuel water separator every 15,000-25,000 miles or every 500-800 engine hours, whichever comes first. More frequent replacement may be necessary in high-humidity environments or when using biodiesel blends. Q: What happens if I don't drain the water separator? A: Failure to drain accumulated water can lead to water passing through to your injectors, causing tip erosion, corrosion, and eventual injector failure. In severe cases, water can cause hydrolock damage. Always drain the water bowl at every oil change or when the water-in-fuel light illuminates. Q: Is this filter compatible with biodiesel? A: Yes, the FS1003 is compatible with biodiesel blends up to B20. For higher biodiesel concentrations, more frequent filter changes are recommended as biodiesel tends to clean fuel systems and may cause faster filter loading initially. Q: Will this fit my truck? A: The FS1003 is designed for Cummins diesel engines. Please verify your engine model and year against the compatibility table above. If you're unsure, contact us with your engine serial number and we'll confirm