FF5825NN Fuel Filter for Cummins ISX11.9 / ISX15.0 Engines
Buy FF5825NN fuel filter for Cummins ISX11.9, ISX15.0, QSX11.9, X15 & Freightliner trucks. OEM cross reference 5599456, 5365988. Factory direct, bulk pricing.
Description
The FF5825NN fuel filter is a heavy-duty spin-on fuel filter engineered for Cummins ISX11.9, ISX15.0, QSX11.9 and X15 diesel engines, widely used in Freightliner trucks and other Class 8 commercial vehicles. IXIN Filter manufactures the FF5825NN to OEM-equivalent specifications, delivering reliable fuel filter performance, effective water separation, and consistent flow for fleets operating in demanding, high-mileage conditions.
As a TS16949-certified filter manufacturer, IXIN supplies the FF5825NN fuel filter to distributors, fleet operators and service centers in 60+ countries, with full traceability and consistent batch quality for bulk and OEM orders.
Product Specifications
| Attribute | Detail |
|---|---|
| Filter Type | Spin-on fuel filter, secondary/final stage |
| Thread Size | 1-14 UNS (confirm before order) |
| Outer Diameter | 93.7 mm |
| Height | 152 mm |
| Micron Rating | 2 micron (nominal) |
| Media Material | Multi-layer synthetic fuel media |
| Gasket Material | Nitrile rubber (NBR) |
| Application | Diesel fuel systems, water separation |
| Certification | TS16949 |
Fits the Following Engines & Vehicles
- Cummins ISX11.9
- Cummins ISX15.0
- Cummins QSX11.9
- Cummins X15
- Freightliner Cascadia (Cummins-powered models)
- Other heavy-duty trucks and equipment using Cummins ISX/X15 engine platforms
FF5825NN Cross Reference / OE Replacement Numbers
The FF5825NN fuel filter is a direct cross reference and replacement for the following OE and aftermarket part numbers:
| Brand / Source | Part Number |
|---|---|
| Cummins OE | FF5825NN |
| Cummins OE | 5599456 |
| Cummins OE | 5365988 |
| Donaldson | DBF6776 |
| Baldwin | BF46129 |
| WIX | WF10515 |
Note: OE numbers can vary slightly by engine year and configuration. Please confirm your equipment nameplate or original part number before ordering.
Why Choose IXIN’s FF5825NN Fuel Filter
- Consistent Filtration Efficiency — Multi-layer synthetic media captures fine particulates and maintains stable flow rate across the service interval, protecting high-pressure common-rail injectors from premature wear.
- Reliable Water Separation — Reduces the risk of water contamination reaching injectors and the fuel pump, one of the leading causes of Cummins ISX fuel system failure. Learn more about how filter quality affects reliability in our guide on OEM vs aftermarket fuel filters.
- OEM-Equivalent Fit — Manufactured to match OE dimensions and thread specifications for the FF5825NN, ensuring drop-in compatibility without modification.
- Factory-Direct Supply — As a manufacturer (not a trading company), IXIN offers stable lead times and customization options for private label, packaging and paper media specification.
- Bulk & OEM Pricing — Volume discounts available for fleet operators, distributors and workshops. See our tips on choosing a fuel filter supplier before placing a bulk order.
Installation & Maintenance Notes
For Cummins ISX11.9 / ISX15.0 / X15 engines, the fuel filter is typically replaced alongside the primary fuel filter as part of scheduled maintenance. Key steps:
- Relieve fuel system pressure before removing the old filter.
- Lightly oil the new gasket with clean diesel fuel before installation to ensure a proper seal.
- Hand-tighten the FF5825NN filter per manufacturer torque specification — avoid over-tightening, which can damage the gasket seal.
- Prime the fuel system per OEM procedure before restarting the engine.
- Recommended replacement interval: follow OEM service schedule, typically every 15,000–25,000 miles depending on fuel quality and duty cycle.
FAQ
Q: Is the FF5825NN fuel filter compatible with all Cummins ISX engines? A: The FF5825NN fits Cummins ISX11.9, ISX15.0, QSX11.9 and X15 engine platforms. Confirm your engine’s exact model and production year against the OE part number before ordering, as configurations can vary.
Q: What’s the difference between IXIN’s FF5825NN and the OEM Cummins filter? A: IXIN manufactures the FF5825NN to match OEM dimensions, thread specifications and filtration performance, using equivalent multi-layer synthetic media. The main difference is price and lead time — IXIN offers factory-direct pricing for bulk and OEM orders without compromising fit or filtration efficiency.
Q: Can I order the FF5825NN with custom packaging or private label? A: Yes. IXIN supports customized packaging, labeling and paper media specifications for distributors and private-label buyers. Contact our sales team with your requirements.
Q: What is the minimum order quantity (MOQ)? A: MOQ varies by customization level. Get in touch with us via WhatsApp or email for current MOQ and lead time on the FF5825NN fuel filter.
