Wix WA11690 Engine Air Filter

Engine Air Filter for Subaru WRX STI

The Wix WA11690 is an engine air filter built for the Subaru WRX STI and other listed applications. It is a panel-style filter made with cellulose media and sized for the specified fitment, with coverage for 2018-2021 models.

Key Features

• Panel-style engine air filter for direct replacement use.
• Enhanced cellulose media with phenolic resin treatment for moisture resistance.
• Contains 30% more media than OES filters, according to Wix.
• Laboratory-tested to at least 99.5% efficiency per ISO 5011, based on Wix 42389.
• Recommended for OEM air filter change intervals.

Detailed Description

Wix WA11690 is an engine air filter designed for normal and severe driving conditions, including stop-and-go traffic, dirt roads, construction zones, short trips, and highway use. The filter uses enhanced cellulose media treated with phenolic resin to improve durability against moisture ingestion, and the polyurethane seal is used where applicable to handle hot and cold temperature extremes. For buyers searching for a Subaru WRX STI engine air filter, WA11690 provides a fitment-specific replacement option with published efficiency testing and media coverage details. This part cross-references Monroe Shocks & Struts (e.g., 16546-AA180, 201690) for the same application.

What It Is Used For

• Replacing a clogged or restricted engine air filter.
• Restoring normal airflow through the intake system.
• Reducing dirt and debris entry into the engine intake.
• Addressing service intervals for routine air filter maintenance.
• Supporting filtration needs in dusty or high-traffic driving conditions.

Installation Notes and Tips

Verify the panel dimensions and compare the old filter to the listed size before installation. Confirm the vehicle application against the fitment data for 2018-2021 Subaru WRX STI. Inspect the airbox for debris and clean the housing before installing the new filter. WA11690 should be matched to the correct OEM service interval for the vehicle.

Quality Assurance

Wix states that this filter meets laboratory efficiency testing to at least 99.5% per ISO 5011, based on Wix 42389. The brand also recommends this filter for OEM air filter change intervals.