Welcome to partflux!
partflux is a free, open cross-reference search engine for automotive and equipment filters, belts, and spark plugs (more part types coming soon). We've built it to make finding equivalent part numbers fast and painless.
What's here so far:
- 835,000+ parts across 3,700 manufacturers and OEMs
- 135,000 cross-reference groups linking equivalent parts from brands like WIX, Baldwin, Fleetguard, FRAM, Donaldson, NAPA, and many more
- Application search — search by vehicle (e.g. "2006 nissan altima oil filter") to find the right part
- Obsolete part tracking — obsolete parts are flagged and linked to their replacements when available
- Specs comparison — see dimensions, thread size, and other specs side-by-side across cross-referenced parts
Data is sourced from manufacturer cross-reference catalogs and is continuously being expanded. More brands and part types are on the way.
If you notice incorrect data or have suggestions, reach out — this is very much a work in progress.