DEF Filter

The 48089821 DEF filter is a genuine OEM CASE Construction filter that safeguards the diesel exhaust fluid system from contamination, available from Southeastern Equipment Company.

Compatible equipment

This part fits 6UZ1XASS01 - ISUZU DIESEL ENGINE - TIER 4B; 6WG1XASS11 - ISUZU DIESEL ENGINE - TIER 4B; CRAWLER EXCAVATOR STD W/BLADE - TIER 4B (NA); LONG CARRIAGE - CRAWLER EXCAVATOR - TIER 4B (NA); LONG CARRIAGE - LONG REACH - CRAWLER EXCAVATOR - TIER 4B (NA); NARROW LONG CARRIAGE - CRAWLER EXCAVATOR - TIER 4B (NA); RETRACTABLE CARRIAGE - CRAWLER EXCAVATOR - TIER 4B (NA) including models AQ, CX130D, CX130D LC, CX145D SR LC, CX145D SR LC W/BLADE, CX160D LC, CX210D LC, CX210D LC LR, CX210D NLC, CX245D, CX245D SR LC, CX250D LC, CX250D LC LR, CX290D LC MH.

Frequently asked questions

What is the part number?

The manufacturer part number is 48089821.

Is this a genuine OEM part?

Yes. Southeastern Equipment stocks OEM and quality aftermarket parts for heavy equipment. Contact us if you need a specific OEM source or aftermarket option.

Will this fit my machine?

See the compatible equipment list above. If your model is not listed, call us with your machine's serial number and we can confirm.

Where does this ship from?

Southeastern Equipment Company ships parts nationwide from our US warehouse. Orders placed before 2 PM ET typically ship same day.

Ships nationwide. In-stock parts ordered before 2:30 PM ET ship the same business day. Your exact shipping cost and delivery estimate are calculated at checkout from your ZIP code and the part’s size and weight; oversized and truck-freight items may need extra transit time and freight charges.

Free branch pickup is also available across Ohio, Indiana, Michigan, and Kentucky — just choose it at checkout.

30-day returns. New, unused parts in original packaging may be returned within 30 days. Some items — including electrical, special-order, and direct-from-supplier parts — are non-returnable. See our full return policy.