Koilonio Engine Air Filter for Freightliner Cascadia 2018–2023 — Direct-Fit, High-Efficiency

Koilonio 03-42776-010 engine air filter is a direct-fit replacement for Freightliner Cascadia 2018–2023, engineered to trap dust and debris and restore proper airflow to your engine.

When heavy-duty trucks spend long hours on the road, a clean air supply is essential for steady performance. This Koilonio replacement matches OE fitment for part numbers including 0342776010, P628541, TR504-EF, AF76010, and 997879, and is built to capture airborne contaminants before they reach the engine. It’s intended for fleet technicians, owner-operators, and maintenance teams who need a reliable, easy-to-install option that maintains airflow and protects critical components.

How does this filter protect my Cascadia’s engine?

The Koilonio element uses pleated filtration media sized to intercept dust, dirt, and road debris while allowing intended airflow. By keeping particles out of the intake system, it helps preserve combustion components and prolong service intervals. Proper filtration reduces the risk of abrasive wear on cylinders and sensors without changing your engine’s designed airflow characteristics.

• High-efficiency pleated media captures fine dust and larger debris
• Seals and frame designed to prevent bypass and ensure full airflow through the media
• Direct replacement shape for an accurate fit in the factory housing

Will this actually fit my Freightliner Cascadia model?

This Koilonio filter is made to replace OEM part number 03-42776-010 and equivalent references listed above for Cascadia model years 2018–2023. Fitment is guaranteed when matched to those specific part numbers, but always verify your vehicle’s part number or housing dimensions before purchase. Installing the correct part prevents leaks and ensures the filtration works as intended.

• Compatible with Freightliner Cascadia 2018–2023 when OEM numbers match
• Designed to match factory mounting points and seal surfaces
• Check your current filter’s part number before ordering

How often should I replace this air filter and why does it matter?

Replacement intervals depend on operating conditions; Koilonio recommends inspection and likely replacement every 10,000–20,000 km (6,000–12,000 miles) under typical conditions. Vehicles operating in dusty or off-road environments will need more frequent changes. Replacing a clogged filter restores airflow, helps maintain fuel efficiency, and reduces stress on the engine’s intake system.

• General guideline: 10,000–20,000 km (6,000–12,000 miles)
• Inspect more often in dusty, construction, or agricultural settings
• Timely replacement helps prevent reduced power and increased fuel use

What are the practical benefits for fleet maintenance and uptime?

Using a correct-fit replacement like this Koilonio unit simplifies inventory and service routines. Technicians can swap filters quickly with minimal adjustment, helping to reduce downtime during routine maintenance. Consistent filtration also reduces the likelihood of downstream repairs caused by contaminated intake air.

• Standardized fit reduces installation time and errors
• Affordable replacement helps control maintenance budgets
• Improves reliability by protecting downstream engine components

Who is this for: This Koilonio 03-42776-010 engine air filter is intended for Freightliner Cascadia owners, fleet maintenance managers, and service technicians who need a dependable, OE-equivalent replacement for model years 2018–2023. Choose this filter if you require an accurate fit, reliable particle capture, and a simple swap-in solution to keep trucks operating efficiently and reduce the risk of intake-related wear between scheduled services.