DODGE RAM 6.7L CUMMINS FUEL WATER SEPARATOR FILTER 2025-2026

iFJF part No.: FJ-00AA. Product Overview The Fuel Water Separator Filter is a direct replacement for the 2025-2026 Ram 2500, 3500, 4500, and 5500 heavy-duty trucks equipped with the 6.7L Cummins turbo diesel engine. This 5-micron absolute fuel filter replaces OEM 68677800AA and is the primary defense against water and particulate contamination that can destroy the CP4.2 high-pressure fuel pump. Includes new O-ring seals for leak-free installation. Key Features 5-Micron Absolute Filtration : Removes 99.9% of particulates 5 microns critical for protecting the CP4.2 high-pressure fuel pump operating at 29,000+ PSI. Water Separation Technology : Hydrophobic media repels and coalesces water droplets, keeping them in the collection bowl where the WIF (Water-In-Fuel) sensor can detect them. Direct OEM Replacement : Identical dimensions, thread pitch, and sealing surface as Mopar 68677800AA. Drops into the factory filter housing with zero modifications. Complete Seal Kit : Includes replacement O-rings critical because the OEM seals harden with heat cycling and can cause air intrusion if reused. CP4.2 Protection : Catastrophic CP4.2 pump failure is a $4,000-8,000 repair. This filter is your cheapest insurance policy. Compatibility Year Make Model Engine Location 2025-2026 Ram 2500 6.7L Cummins Front Frame Rail (Under Driver) 2025-2026 Ram 3500 6.7L Cummins Front Frame Rail (Under Driver) 2025-2026 Ram 4500 6.7L Cummins Front Frame Rail (Under Driver) 2025-2026 Ram 5500 6.7L Cummins Front Frame Rail (Under Driver) Specifications Specification Value Part Number FJ-00AA OE Cross Reference 68677800AA Micron Rating 5 Micron Absolute Filter Media Cellulose/Synthetic Blend with Hydrophobic Treatment Service Interval 15,000 miles (Normal) / 10,000 miles (Severe) Frequently Asked Questions Q: How often should I replace this fuel filter? A: Ram recommends replacing the fuel water separator filter every 15,000 miles or every other oil change under normal conditions. For severe-duty use (heavy towing, biodiesel blends, dusty conditions), replace every 10,000-12,000 miles. Q: Why is the fuel filter so critical on the 2025-2026 Cummins? A: The 6.7L Cummins uses a Bosch CP4.2 high-pressure fuel pump that operates at up to 29,000 PSI. Any water or particulate contamination can destroy the pump ($4,000+ repair). The 5-micron fuel water separator is your first and most important line of defense. Q: Does this include the water-in-fuel sensor? A: No. This is the filter element only. The water-in-fuel sensor is integrated into the filter housing and does not need to be replaced during normal filter service just unplug it during the change. Q: Is this OEM or aftermarket? A: This is a high-quality aftermarket filter manufactured to IATF 16949 standards, matching or exceeding the OEM 68677800AA filtration specifications. Same 5-micron absolute rating same protection at a better price.