Premium Guard PC9978X Cabin Air Filter

Premium Guard PUREFLOW Cabin Air Filter

Premium Guard PUREFLOW PC9978X is a cabin air filter built for Lexus vehicles that use a behind-the-glove-box filter location. Its antibacterial filter media is designed to help maintain cleaner air inside the cabin while supporting HVAC airflow and everyday comfort.

Compatible with Lexus IS350, IS300, IS500, RC F, RC300, RC350, GS F, GS350, GS300, GS450h, GS200t, IS200t, RC200t, and IS250 applications, this filter is sized for the listed fitments and follows the PUREFLOW product line format for direct replacement service.

Key Features

• Antibacterial filter media for cabin air filtration
• PUREFLOW product line cabin air filter
• Direct-fit dimensions: 8.75 in. length, 7.96 in. width, 1.14 in. thickness
• Designed for behind-glove-box installation locations
• Cross-references OE and aftermarket numbers including 87139-30100 and Wix WP10099
• Part number: PC9978X

Fitment Details

• Fits 2014-2026 Lexus IS350, located behind glove box.
• Fits 2016-2025 Lexus IS300, located behind glove box.
• Fits 2022-2025 Lexus IS500, located behind glove box.
• Fits 2015-2025 Lexus RC F, located behind glove box.
• Fits 2016-2025 Lexus RC300, located behind glove box.
• Fits 2015-2025 Lexus RC350, located behind glove box.
• Fits 2016-2020 Lexus GS F, located behind glove box.
• Fits 2013-2020 Lexus GS350, located behind glove box.
• Fits 2018-2019 Lexus GS300, located behind glove box.
• Fits 2013-2018 Lexus GS450h, located behind glove box.
• Fits 2016-2017 Lexus GS200t, located behind glove box.
• Fits 2016-2017 Lexus IS200t, located behind glove box.
• Fits 2016-2017 Lexus RC200t, located behind glove box.
• Fits 2014-2015 Lexus IS250, located behind glove box.

Detailed Description

PC9978X is a Premium Guard PUREFLOW cabin air filter for Lexus sedans and coupes that use the behind-glove-box filter housing. The antibacterial media is selected to support cabin air filtration in daily driving, helping capture airborne contaminants before they enter the HVAC system. For Lexus IS350, IS300, IS500, RC F, RC300, and RC350 owners, this is a direct replacement option that matches the listed dimensions and application notes.

This part cross-references OE and aftermarket numbers such as 87139-30100 and Wix WP10099 for the same application. The PUREFLOW line identifies this filter as part of Premium Guard’s cabin air filtration range, with fitment coverage spanning 2013-2026 Lexus models listed above. Part number PC9978X is the identifier to verify before ordering or service.

Common Problems It Can Help Address

• Reduced cabin air quality from dust and road debris
• Musty or stale HVAC airflow caused by a loaded filter
• Restricted airflow through the climate control system
• Premature buildup of contaminants in the cabin air path
• Service intervals where the existing Lexus cabin filter is due for replacement

Installation Notes

Install in the behind-glove-box filter location specified for the listed Lexus applications. Confirm the vehicle year, model, and existing filter dimensions before installation, and compare the old filter to PC9978X to verify orientation and size. Access is typically through the glove box area, so take care when removing trim or the filter cover.

Quality Assurance

Premium Guard PUREFLOW cabin air filters are built to match the listed application data and dimensional specifications for the confirmed Lexus fitments. Verify part number PC9978X against the vehicle’s service information before installation.