Wix 42991 Engine Crankcase Breather Element

Wix 42991 Engine Crankcase Breather Element

The Wix 42991 engine crankcase breather element is a synthetic breather filter built for light-duty applications that need clean crankcase ventilation. Its compact 1.220-inch height, 4.000-inch length, and 1.750-inch width make it a direct-service style breather element for select Ford, Mercury, Pontiac, Buick, and Lincoln vehicles.

Compatible With classic Ford Bronco, F-150, F-250, Mustang, and related applications, this breather element supports filtration in the crankcase ventilation path. The Wix 42991 is also cross-referenced to ACDelco A2986C and FRAM BA24 for the same application.

Key Features

• Brand: Wix
• Part number: 42991
• Part type: Engine crankcase breather element
• Style: Breather filter
• Media material: Synthetic
• Closed inner diameter top
• Light-duty duty type
• Compact dimensions for select OE-style housings

Detailed Description

Filtration is a core part of maintenance because it helps keep engine systems cleaner over time. This Wix breather element uses synthetic media to filter crankcase air as it passes through the breather assembly. The closed-top design and compact form factor support fitment in applications that call for a small, serviceable breather element rather than a full canister-style filter.

Fits 1966-1977 Ford Bronco, N/A; Fits 1980-1985 Ford Bronco, N/A; Fits 1975-1985 Ford F-150, N/A; Fits 1971-1985 Ford F-250, N/A; Fits 1971-1985 Ford F-350, N/A; Fits 1970-1973 Ford Mustang, N/A; Fits 1979-1982 Ford Mustang, N/A; Fits 1985 Ford Mustang, N/A. Additional coverage includes select Ford E-Series vans, Ford F-100, Ford Fairmont, Ford LTD, Mercury Marquis, Mercury Zephyr, Mercury Capri, Mercury Cougar, Mercury Monarch, Mercury Bobcat, Mercury Montego, Lincoln Continental, Lincoln Versailles, Pontiac Firebird, Pontiac Laurentian, Pontiac Grand LeMans, Pontiac LeMans, and Buick LeSabre applications listed in the fitment data.

What It Helps Address

• Dirty or restricted crankcase breather media
• Unstable crankcase ventilation flow caused by a worn breather element
• Service replacement needs for OE-style breather filter housings
• Maintenance on classic Ford, Mercury, Pontiac, Buick, and Lincoln applications
• Fitment replacement for vehicles calling for Wix 42991 or listed cross-reference numbers

Installation Notes and Tips

Verify the housing dimensions and OE part number before installation. This breather element is listed for N/A position applications, so match the original breather location and housing style on the vehicle. Inspect the breather housing for debris, oil saturation, or damage before installing the new element, and confirm the element seats fully in the filter base.

Quality Assurance

Wix filtration products are built around maintenance-focused service parts and supplemental filtration components. The 42991 breather element follows that approach with a synthetic media design intended for routine service in listed applications. No warranty information was provided in the product data.