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WIX · Filtration
49478
In stock · ships from Knoxville
The WIX 49478 is a heavy-duty panel air filter designed for diesel engines in Freightliner trucks such as the Cascadia, Coronado, and 122SD.
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Verified fitment for 3 applications
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All confirmed applications for this part number.
Primarily used on Freightliner heavy-duty trucks. Verify compatibility with your specific engine and air-cleaner housing before purchase.
Part data verified against 5 catalog sources
Numbers this part supersedes or interchanges with. Showing 13 of 13.
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It uses cellulose filtration media to trap dirt, dust, and debris, protecting the engine from premature wear and ensuring proper airflow. Replacing a clogged filter at recommended service intervals helps maintain fuel efficiency and engine performance. The filter features durable construction with pleat stabilization and corrosion-resistant components to meet OEM standards.
Part Number: 49478
AIR FILTER
Dealer: Knox Trailers
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