KAX Engine & Cabin Air Filter Kit CA4309/CF11776 — 2-Piece Activated Charcoal for Nissan & INFINITI (Select Models)

KAX CA4309 CF11776 is a two-piece engine and cabin air filter kit designed to restore airflow, reduce odors, and protect both the motor and passengers in select Nissan and INFINITI models.

This KAX maintenance bundle pairs an engine air filter with a cabin air filter so you can update both systems at once. Built for specific Nissan and INFINITI fitments—including Pathfinder, Murano, Maxima, Altima and QX60/JX35 ranges—the kit uses multi-layer filtration and coconut shell activated charcoal to help trap particulates and mitigate unpleasant smells. The set is intended as a direct-fit replacement, simplifying routine service and helping maintain engine efficiency and interior comfort.

Which vehicles does this kit fit?

The KAX CA4309 CF11776 is engineered for a set of Nissan and INFINITI models that share compatible filter sizes and housings. It covers model years where these vehicles were factory-equipped with the same filter specifications, so it’s a direct swap in those applications.

• Nissan Pathfinder: 2013–2020 with 3.5L engines
• Nissan Murano: 2015–2024 3.5L
• Nissan Maxima: 2016–2023
• Nissan Altima: 2013–2018 3.5L
• INFINITI QX60 and JX35: 2014–2020

How do these filters improve driving performance and cabin comfort?

The engine air filter helps preserve engine breathing by catching dust and debris before they reach intake components, which supports steady fuel combustion and longevity. The cabin air filter reduces airborne contaminants and uses activated charcoal to lower interior odors, improving comfort for the driver and passengers.

• Engine filter: blocks dust, pollen, and road grit from intake system
• Cabin filter: traps pollen, dust and reduces odors with charcoal
• Combined replacement: synchronizes maintenance for consistent protection

How easy is installation and routine service?

Both pieces are designed as direct-fit replacements for the listed vehicles, so installation is straightforward and typically requires only common hand tools. Many owners report a quick swap in under 10 minutes, making this set suitable for a DIY service interval or a standard shop visit.

• Direct-fit design: no trimming or modification required
• Installation time: generally 5–10 minutes per filter for experienced users
• Recommended interval: replace together every 12 months or ~12,000 miles

What is special about the materials and filtration design?

The filters use a multi-layer media to capture a wide range of particle sizes while maintaining airflow. The cabin filter includes coconut shell activated charcoal to adsorb and neutralize odors rather than simply masking them, and the engine filter is built to withstand normal engine bay conditions while filtering efficiently.

• Multi-layer media: balances particle capture with airflow
• Activated charcoal: reduces odors in the cabin air stream
• Durable construction: resists collapse under engine vacuum and temperature changes

Who is this for? The KAX CA4309 CF11776 kit is intended for owners of the listed Nissan and INFINITI models who want a convenient, value-focused way to refresh both engine and cabin filtration at once. It’s well suited to drivers who perform basic vehicle upkeep themselves or shops looking to offer a paired replacement that saves time and reduces the chance of overlooking the companion filter during service. Replace both parts together to maintain engine performance and a more pleasant in-cabin air experience without extra trips or separate orders.