AF25139M Heavy-Duty Air Filter for Freightliner Trucks: Applications and Cross-References

A reliable engine air filter is essential for helping protect a heavy-duty truck’s engine from dust, dirt and airborne contaminants. If you are searching for a replacement air filter for select Freightliner trucks, the JTL Parts AF25139M heavy-duty air filter may be the right option for your application.

Designed for heavy-duty engine air intake systems, the AF25139M is compatible with several Freightliner truck models and can be identified using commonly used cross-reference numbers, including RS3518, P185069, P527682 and LAF1849.

What Is the AF25139M Engine Air Filter?

The AF25139M engine air filter is a direct-replacement filter designed for select heavy-duty Freightliner trucks. Its primary function is to filter dust and contaminants before they enter the engine’s air intake system.

A properly matched air filter helps support clean airflow and protects engine components from particles that could contribute to premature wear. For this reason, selecting a replacement based on the correct part number, vehicle application and filter dimensions is important.

AF25139M Cross-Reference Numbers

Cross-reference numbers help connect equivalent or comparable part numbers used by different manufacturers and catalogs. The AF25139M crosses to the following commonly searched filter numbers:

RS3518
P185069
P527682 (Blue)
LAF1849

These numbers can help narrow your search when replacing an existing Freightliner engine air filter. However, a cross-reference number should not be the only factor used to confirm compatibility.

Always compare the current filter number, dimensions and vehicle information before placing an order.

Freightliner Truck Compatibility

The AF25139M heavy-duty air filter is designed for select Freightliner truck applications, including:

Freightliner Columbia: 2000–2013
Freightliner Century Class: 1997–2011
Freightliner Coronado: 2001–2013
Freightliner FLD120: 1988–2008

Some configurations of the Freightliner FLD120SD and other related models may also use this type of filter.

Vehicle configurations can vary according to year, engine, trim and air intake system. Before ordering, verify compatibility using the existing filter number, an OEM reference, the filter measurements or the truck’s VIN.

Why Is the Engine Air Filter Important?

Heavy-duty trucks frequently operate in environments where dirt, dust and road debris are present. The engine air filter creates a barrier that helps keep these contaminants out of the air intake system.

A properly selected and maintained air filter can help:

Filter dust and airborne contaminants
Support clean airflow through the intake system
Protect internal engine components
Maintain dependable performance in heavy-duty applications
Provide a direct replacement for the existing filter

The air filter should be inspected as part of the truck’s regular maintenance schedule. Replacement intervals can vary depending on operating conditions, mileage and the vehicle manufacturer’s recommendations.

How to Confirm the Correct Replacement Filter

Two air filters may look similar while having different dimensions, sealing surfaces or applications. Before replacing an LAF1849 air filter, RS3518, P185069 or P527682, confirm the following information:

The part number printed on the current filter
The truck’s make, model and year
The engine and air intake configuration
The filter’s overall dimensions
The VIN, when available

Checking this information helps reduce the risk of ordering a filter that does not match the vehicle’s air intake system.

Find the Right Heavy-Duty Air Filter

The JTL Parts AF25139M engine air filter provides a replacement option for select Freightliner Columbia, Century Class, Coronado and FLD120 trucks.

Before ordering, verify the application using the current filter number, cross-reference, measurements and vehicle information.

Explore heavy-duty replacement parts and find more information at jtlparts.com.