Wix 46138 Engine Air Filter

Engine Air Filter for Select GM Cars

The Wix 46138 engine air filter is a panel-style replacement built for select Buick, Chevrolet, Oldsmobile, and Pontiac applications. It is made for normal and severe driving conditions, including stop-and-go traffic, dirt roads, construction sites, short trips, and highway use.

• Panel-style air filter with cellulose media
• Phenolic resin treatment adds durability against moisture ingestion
• Contains more media than comparable OES filters
• Recommended for OEM air filter change intervals
• Laboratory-tested to at least 99.5% efficiency per ISO 5011, based on Wix 42389

Filter Construction and Performance

Wix 46138 uses enhanced cellulose media treated with phenolic resin to improve durability in damp conditions. The closed-top panel design and 210 CFM rating support steady airflow while helping maintain engine protection during routine service intervals. This Wix air filter is a direct service part for vehicles such as the Pontiac Grand Prix, Chevrolet Cavalier, and Buick Skylark, and it is identified by part number 46138.

What This Air Filter Helps Address

• Restricted airflow from a dirty or loaded engine air filter
• Dust and debris entering the intake system
• Reduced filtration performance during stop-and-go driving
• Moisture-related media breakdown in demanding conditions
• Service intervals that call for a replacement filter

Installation Notes and Tips

Verify the panel dimensions and filter style before installation: 9.528 inches long, 4.488 inches wide, and 1.264 inches high. The filter has a closed inner diameter top and is intended for applications that use a panel air filter. Confirm the vehicle’s air box configuration against the listed fitment before ordering.

Quality Assurance

Wix recommends this filter for OEM air filter change intervals. It is built with enhanced cellulose media and tested to ISO 5011 efficiency standards, with laboratory results of at least 99.5% efficiency based on Wix 42389. Part number 46138 is also referenced by multiple aftermarket and OE cross numbers for the same application.