PHILTOP CA4309+CF11776 Engine & Cabin Air Filter Set

PHILTOP CA4309+CF11776 is a matched engine and cabin air filter kit designed to fit select Nissan and INFINITI models, combining intake protection and interior air cleaning in one convenient purchase.

This two-piece kit includes an engine air filter (CA4309) and a cabin air filter (CF11776) tailored for Nissan Pathfinder (2013–2020 3.5L), Nissan Murano (2015–2024 3.5L), INFINITI QX60 (2014–2020 3.5L), Nissan Maxima (2016–2023), Nissan Altima (2013–2018 3.5L), and INFINITI JX35 (2013). PHILTOP engineered the pair to simplify maintenance: one order supplies both filters that work together to help protect your engine and improve cabin air quality. The set saves time and ensures you replace both elements on the same service interval for balanced performance.

How does replacing both filters at once benefit my vehicle?

Swapping the engine and cabin filters together helps maintain consistent airflow management for the vehicle and keeps contaminants out of both the intake and passenger compartment. Coordinated replacement avoids mismatched service intervals that can compromise engine efficiency or cabin comfort.

• Engine filter traps road dust and debris to protect engine components.
• Cabin filter captures pollen, dust, and odors to improve air quality.
• Replacing both reduces the chance one worn filter undermines the other's performance.
• One maintenance interval simplifies record-keeping and saves time.

Will these filters fit my Nissan or INFINITI model?

The set is made to directly replace the specified OEM part numbers for the listed model years and engines. Fitment is model- and year-specific; check your vehicle’s year and engine size to confirm compatibility before ordering.

• Fits Nissan Pathfinder 2013–2020 3.5L and Murano 2015–2024 3.5L.
• Compatible with INFINITI QX60 2014–2020 3.5L and JX35 2013.
• Also fits Nissan Maxima 2016–2023 and Altima 2013–2018 3.5L.
• Engine part CA4309 and cabin part CF11776 match OEM sizing.

How difficult is installation for a DIYer?

Both filters are designed for direct OE fit and straightforward installation. The cabin filter is usually accessed behind the glovebox and can often be replaced without tools; the engine air filter sits in the engine bay housing for quick swap-out.

• Cabin filter typically swaps in minutes, often tool-free.
• Engine filter fits into the factory airbox under the hood.
• Clear instructions included to guide each step.
• Ideal for home maintenance or quick shop service.

When should I replace these filters?

PHILTOP recommends replacing both the cabin and engine air filters together every 12 months or 12,000 miles to maintain performance and air quality. Driving conditions such as heavy dust, pollen, or urban pollution may justify more frequent changes.

• Standard recommendation: every 12 months or 12,000 miles.
• Replace sooner when driving in dusty or high-pollen areas.
• Follow owner’s manual for vehicle-specific maintenance intervals.
• Keeping records of combined replacements simplifies future service.

Who is this for: The PHILTOP CA4309+CF11776 kit is aimed at owners of the listed Nissan and INFINITI models who want a simple, reliable way to maintain engine protection and cabin air quality. It's also a smart choice for DIY enthusiasts who value a direct-fit, two-filter solution packed for convenience, and for fleet managers who prefer uniform maintenance intervals across vehicles. If you want both the intake and passenger cabin protected with one purchase, this paired kit delivers an easy, practical maintenance upgrade.