Filter Cross Reference

    Baldwin BF9921-O cross reference

    Manufacturer numbers Baldwin lists BF9921-O as the replacement for

    Baldwin lists BF9921-O as the replacement for these manufacturer part numbers:

    ManufacturerTheir part number
    CARQUEST86986
    CARQUEST96547
    GRAINGER36VX19
    JOHN DEERERE503676
    KNECHTKC430D
    MAHLEKC430D
    (manufacturer not verified)NLRE503676
    (manufacturer not verified)SK3725

    Source: Baldwin Manufacturers' Cross-Reference, Form 560-24 (2024). Baldwin's published direction is manufacturer part → Baldwin replacement. This list shows what Baldwin published in 2024. It does not verify that the numbers interchange today.

    Upgrade chains run one way: equipment spec'd with a newer filter number should not step back to the older one. Go by what the truck was spec'd with.

    Always verify against the current OEM catalog before ordering. Cross references are a starting point, not a guarantee of fit.