K&N Engine Air Filter KNA-5049 — Long-Life 18,000-Mile Replacement, High-Flow Filtration

The K&N Engine Air Filter KNA-5049 is a long-life replacement air filter designed to deliver up to 18,000 miles of reliable engine protection and high-flow performance.

K&N has built a reputation for high-flow filtration since 1969; this KNA-5049 variant brings that proven technology to drivers who want extended service intervals without sacrificing filtration efficiency. Engineered to meet or exceed original equipment manufacturer (OEM) fit and function, the KNA-5049 drops into your factory air box for a fast swap and uses premium synthetic or cellulose-blend media to capture contaminants while supporting airflow.

How does the KNA-5049 extend maintenance intervals?

This K&N long-life filter is rated for up to 18,000 miles of typical highway driving, giving about 50% longer service life compared with many 12,000-mile disposable filters. Longer life reduces the frequency of replacements and downtime for routine maintenance.

• 18,000-mile recommended replacement interval under normal highway conditions
• Premium media (synthetic or cellulose-blend depending on application)
• Durable construction designed for extended use
• May reduce replacement costs and service events over time

What level of protection and airflow does this filter provide?

The media used in the KNA-5049 achieves up to 99% filtration efficiency for many particle sizes while still supporting the high airflow K&N is known for. That balance helps protect the engine from harmful debris without unnecessarily restricting intake air.

• Up to 99% engine protection with application-specific media
• Designed for high-flow performance to maintain engine response
• Engineered to meet or exceed OEM filtration and airflow targets
• Quality control to ensure consistent performance across replacements

How simple is installation for a typical vehicle owner?

Installation is straightforward: the KNA-5049 is shaped to fit the factory air box and usually installs without tools. Most drivers can complete the replacement in minutes by removing the old filter and dropping the K&N unit into place.

• Direct-fit design for compatible vehicles listed by K&N
• Typical no-tools installation into the factory air box
• OEM-style sealing surfaces to ensure proper fit and function
• Clear install procedure reduces time and potential errors

Which vehicles are compatible with this K&N part number?

The KNA-5049 fits a range of Buick, Cadillac, Chevrolet, Holden, Opel and Vauxhall models across recent model years. Always verify part fitment for your specific engine and model year before purchasing.

• 2021–2026 Buick Envision
• 2019–2025 Cadillac XT4
• 2016–2025 Chevrolet Malibu and other listed GM models
• See the full compatible list for Buick Regal, Insignia, LaCrosse, Holden, Opel and Vauxhall applications

Who this is for: The K&N KNA-5049 is intended for drivers who want a factory-fit replacement that extends service intervals without sacrificing filtration efficiency or airflow. It suits everyday commuters, vehicle owners looking to lower routine maintenance frequency, and DIYers who prefer quick, tool-free swaps. If your vehicle is listed among the compatible models and you want a dependable, longer-life air filter, the KNA-5049 is crafted for that balance of protection and convenience.