Your cart is empty
Browse our catalog to find the parts you need.
These images are illustrative and may not match the product exactly. Always verify by part number — or confirm instantly with the assistant using a photo or VIN.
NAPA · Filtration
3849
In stock · ships from Knoxville
The NAPA 3849 is a fuel filter maintenance kit designed for Detroit Diesel DD13 and DD15 engines.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
Verified fitment for 10 applications
Add your truck to see whether it's one of them
All confirmed applications for this part number.
Freightliner
Sterling
Western Star
Freightliner
Sterling
Western Star
For Detroit Diesel DD13/DD15 engines. Kit contains 3 separate filter elements; not sold individually. Verify engine series before ordering.
Part data verified against 3 catalog sources
Numbers this part supersedes or interchanges with. Showing 12 of 12.
Different year, make, or config? Get a confirmation against your truck in under a minute.
It includes three separate filter elements—typically a primary, secondary, and water separator—to capture contaminants and water, protecting the high‑pressure fuel system from wear and injector damage. The kit is replaced at the engine manufacturer’s recommended service intervals to ensure clean fuel delivery and reliable operation. This kit fits many Freightliner, Western Star, and Sterling trucks equipped with DD13/DD15 engines.
Part Number: 3849
FUEL FILTER
Category: Filters
Unit: ea
Dealer: Post Onsite
Compatibility, alternatives, and more
