Try-H Engine Air Filter for Freightliner Cascadia 03-42776-010 — Heavy-Duty Multi-Layer Factory-Fit

The Try-H 03-42776-010 engine air filter is a direct-fit replacement for Freightliner Cascadia models (2019–2023), engineered to trap dust and particulates and help keep the intake system clean.

This heavy-duty replacement air filter (OE 03-42776-010; replaces 91559, TR504-EF, 0342776010, 997879) is built for long service life under commercial driving conditions. It uses multi-layer composite media and a rigid frame designed to resist deformation and high temperatures, delivering reliable airflow while intercepting fine contaminants before they reach the engine. The Try-H unit installs like the factory part, so technicians and fleet operators can swap it in quickly without modifying the intake housing.

How does this filter protect my Freightliner Cascadia engine?

The multi-layer filter media captures dust, road debris, and fine particulates that would otherwise enter the intake, reducing abrasive wear on internal components and helping maintain consistent engine performance. Its durable frame keeps the pleats stable for effective filtration even in high-vibration conditions.

• Multi-layer composite media traps a wide size range of particles
• Rigid, temperature-resistant frame preserves seal and shape
• Factory-matched dimensions ensure proper fit and intake sealing

What vehicles and OEM numbers does this replace?

This replacement is manufactured for Freightliner Cascadia trucks from 2019 through 2023 and matches the original equipment form and fit. It cross-references several OE and aftermarket part numbers so you can confirm compatibility with your maintenance records.

• Exact fit for Freightliner Cascadia (2019–2023)
• OE: 03-42776-010
• Replaces: 91559, TR504-EF, 0342776010, 997879

How often should I replace the Try-H 03-42776-010 air filter?

Service intervals are influenced by driving environment and duty cycle. Try-H recommends a routine replacement interval of about 12 months or 12,000 miles, with earlier replacement if heavy dust or visible blockage is present.

• Typical recommendation: every 12 months or 12,000 miles
• Replace sooner in dusty, off-road, or construction environments
• Monitor for reduced power, heavy soot, or visible clogging

Is installation difficult—what do I need to know?

Installation is straightforward because the filter is molded to match the factory intake housing. No cutting, adapters, or special tools are required for most service bays, making it suitable for quick fleet maintenance stops.

• Comes as one complete 03-42776-010 air filter unit
• Direct factory-fit design—no modifications needed
• Quick swap saves technician time during scheduled service

Who is this for? This Try-H 03-42776-010 engine air filter is intended for fleet managers, owner-operators, and mechanics who service Freightliner Cascadia tractors (2019–2023) and need a reliable, OE-equivalent replacement. It’s suited for long-haul and vocational trucks that require durable filtration under heavy use and varying environmental conditions. Choose Try-H when you want a direct-fit, high-efficiency air filter that helps keep intake systems clean and simplifies routine maintenance.