ATRACYPART CV50634 Crankcase Breather Filter for Cummins ISX15.0 — Direct-Fit OE Replacement, Heat-Resistant Housing

ATRACYPART CV50634 is a direct-fit crankcase breather filter designed to replace OE crankcase filtration on Cummins ISX 15.0 engines and compatible heavy-duty trucks.

This heavy-duty crankcase ventilation element prevents oil vapor and contaminants from re-entering the intake or escaping into the environment by capturing blow-by gases inside the valve cover/vent system. Built to match OE fitment and replace part numbers such as 904-7904, 99340, CB57 and CV50617/CV50633, the CV50634 offers a service-ready solution for a long list of truck makes and models—Volvo, Kenworth, Peterbilt, Freightliner, International, Western Star and more. The assembly is molded for heat resistance and designed for straightforward installation and reliable operation under commercial-use conditions.

Which vehicles and engines will this crankcase breather fit?

The CV50634 is intended for 15.0L Cummins ISX engines and a wide range of heavy trucks from 2008–2013. Confirm fitment by cross-referencing the OE numbers listed on your original breather or parts diagram before ordering.

• Direct compatibility: 2010–2012 Cummins ISX15.0 engines.
• Truck compatibility: Kenworth T660/T680/T800/W900 and many Peterbilt, Volvo, Freightliner, International models (2008–2013 ranges).
• Replaces OE: 904-7904, 99340, CB57, 3685528, CV50617, CV50634, CV50633.

How does this replacement breather help engine performance and maintenance?

A functioning crankcase breather controls oil vapor and particulate carryover from the crankcase. By capturing contaminants and venting gasses correctly, the breather helps maintain cleaner intake components and reduces oil consumption and visible leaks associated with failed breathers.

• Reduces oil vapor blow-by into intake and surrounding engine bay.
• Helps prevent excessive oil consumption and visible engine oil leaks.
• Molded housing resists heat and maintains sealing under heavy-duty duty cycles.

What are the build quality and replacement features of the ATRACYPART unit?

The CV50634 is manufactured to match OE design and dimensions for direct-fit replacement. The housing uses reinforced materials to resist elevated under-hood temperatures while the internal filter media captures oil mist and particulates, delivering a longer in-service life when compared to degraded or failed breathers.

• OE-style construction for direct fit and factory appearance.
• Reinforced housing material for improved temperature and durability resistance.
• Tested for trouble-free installation and lifespan consistent with heavy-duty use.

How do I confirm this is the correct part and install it?

Before purchase, compare your current breather’s part number or consult your vehicle parts diagram. Installation is typically a simple removal of the old element and secure placement of the new unit into the valve cover or breather port; tighten or clip per factory torque/clip instructions.

• Verify OEM numbers: 904-7904, 99340, CB57, 3685528, CV50617, CV50634, CV50633.
• Basic installation: remove old breather, clean sealing surface, install replacement and secure per OEM guidance.
• Service note: check for oil leaks and proper seating after installation; replace if housing is cracked or distorted.

Who is this for: The ATRACYPART CV50634 is aimed at fleet mechanics, owner-operators and repair shops servicing medium- and heavy-duty trucks with the Cummins ISX15.0 engine and the compatible model ranges listed. If you need an OE-style, direct-fit crankcase breather that replaces common part numbers and improves crankcase ventilation reliability, this unit provides a practical, service-oriented replacement with a 24-month support commitment from ATRACYPART.