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Caterpillar (CAT) · Engine
3805839
In stock · ships from Knoxville
This is a crankcase breather filter element, often listed as a Filterbreather or Element AS by Caterpillar.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
We don't publish fitment for this part yet. Rather than guess, get it confirmed against your truck in under a minute.
It is designed to filter oil mist and contaminants from the crankcase ventilation gases in heavy-duty diesel engines before the air is recirculated into the intake or vented to the atmosphere. You typically replace this element when it becomes clogged with sludge or soot, which can cause increased crankcase pressure, oil leaks, or reduced engine efficiency. Maintaining a clean breather filter is essential for preventing engine seal damage and keeping your turbo and aftercooler free of oily residue.
Part Number: 3805839
CRANK CASE ELEMENT
Vendor: STOWERS MACHINERY
Dealer: Post Onsite
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