Koilonio Engine Air Filter for Freightliner Cascadia 2018–2023 — Direct Replacement 03-42776-010, High-Efficiency Pleated Media

Koilonio 03-42776-010 is a direct-replacement engine air filter engineered to fit Freightliner Cascadia models from 2018–2023, trapping dust and debris to help preserve engine airflow.

This Koilonio air filter replaces OEM numbers 03-42776-010 / 0342776010 and equivalent references (P628541, TR504-EF, AF76010, 997879). It’s built to meet OEM fit and filtration expectations so you can swap it in without modification. Whether you maintain a single truck or a fleet, a properly sized, well-made air filter reduces the risk of debris reaching sensitive engine components and helps engines breathe more consistently under real-world operating conditions.

How does this filter protect a Freightliner Cascadia engine?

The Koilonio element captures airborne particles before they enter the intake, reducing abrasive wear on cylinders, valves, and sensors. Better filtration helps maintain stable airflow and can reduce strain on the engine’s air metering systems.

• High-efficiency pleated media traps fine dust and larger debris.
• Reinforced frame maintains shape under airflow and vibration.
• Exact-fit dimensions align with factory housings for proper sealing.

Will this part fit my truck and replace the OEM part number I have?

This Koilonio filter is designed as a direct replacement for listed OEM numbers and fits Freightliner Cascadia model years 2018–2023 when the original part matches those references. Always compare your existing part number and housing shape before installing.

• Replaces: 03-42776-010 / 0342776010 and equivalents like P628541, TR504-EF, AF76010, 997879.
• Compatible with Freightliner Cascadia 2018–2023—verify against your truck’s current filter number.
• Installation uses factory mounting points; no cutting or adapters required.

How often should I replace this air filter in daily operation?

Recommended replacement intervals are general guidance; actual needs depend on road and load conditions. For many heavy-duty trucks the suggested range is roughly 10,000–20,000 km (6,000–12,000 miles), but dusty routes require more frequent checks and earlier replacement.

• Typical interval: 10,000–20,000 km (6,000–12,000 miles).
• Inspect more often when operating in dusty, off-road, or high-load environments.
• A visibly clogged filter or reduced performance indicates immediate replacement.

What are the visible quality features to expect on this Koilonio filter?

The Koilonio unit uses durable pleated filtration media and a reinforced outer frame to maintain shape and seal under vibration and airflow. Proper sealing and consistent pleat spacing maximize usable filter area for longer service life.

• Pleated media for increased surface area and dust-holding capacity.
• Rigid frame to prevent collapse and ensure a tight housing seal.
• Manufactured to match OEM dimensions for straightforward replacement.

Who is this for: Fleet managers, owner-operators, and maintenance technicians who service Freightliner Cascadia trucks from 2018–2023 and need a reliable, OEM-compatible air filter. Choose this Koilonio replacement when you require correct fitment, robust construction, and a filtration element sized and specified to work with factory intake housings. Always confirm your vehicle’s existing part number and inspect the filter housing before purchase to ensure compatibility.