K&N 33-2031-2 Engine Air Filter

Overview of the K&N 33-2031-2 Engine Air Filter

The K&N 33-2031-2 replacement air filter is designed to provide reliable air filtration for select INFINITI, Nissan, and Subaru vehicles. Featuring a panel design with cotton gauze material, this high-performance filter supports engine efficiency and longevity.

• High-performance engine air filter with cotton gauze media
• Panel shape with flexible frame design for secure fitment
• Pre-oiled filter requiring 1.06 oz (31 ml) of re-oiling for maintenance
• Dimensions: 11 in length x 6.563 in width x 1.125 in height
• Washable and reusable for extended service life
• Compatible with multiple INFINITI, Nissan, and Subaru models
• Backed by a 1,000,000 mile/10 year warranty

Detailed Product Description

The K&N 33-2031-2 engine air filter utilizes a cotton gauze filtration material that balances airflow and particle capture, helping maintain engine performance. Its panel air filter style and flexible frame design ensure a proper seal and fit within the air intake system. The filter comes pre-oiled, simplifying initial installation, and requires periodic re-oiling of 1.06 oz (31 ml) to maintain optimal filtration efficiency. Measuring 11 inches in length, 6.563 inches in width, and 1.125 inches in height, this filter is engineered to fit specific INFINITI, Nissan, and Subaru vehicles including models such as the Nissan 240SX, 350Z, Altima, and the Subaru Impreza.

Compatible Vehicles and Applications

• INFINITI models: FX35, G35, I30, I35, JX35, M30, Q45, QX4, QX60
• Nissan models: 200SX, 240SX, 300ZX, 350Z, Altima, D21, Frontier, Maxima, Murano, NX, Pathfinder, Pickup, Pulsar NX, Quest, Sentra, X-Trail, Xterra
• Subaru model: Impreza

Common Issues Addressed by This Air Filter

• Reduced engine airflow due to clogged or dirty filters
• Decreased fuel efficiency from restricted air intake
• Engine performance loss caused by poor air filtration
• Increased engine wear from contaminants entering the combustion chamber
• Frequent replacement costs with disposable filters

Installation Notes and Tips

Installation of the K&N 33-2031-2 air filter is straightforward and designed to replace the factory panel filter. Ensure the air filter housing is clean before installation. Since the filter is pre-oiled, no additional oiling is necessary at first installation. For maintenance, clean and re-oil the filter using 1.06 oz (31 ml) of K&N filter oil to maintain filtration performance. Always verify fitment with your vehicle’s specifications before installation.

Quality Assurance and Warranty

This K&N engine air filter is washable and reusable, supporting long-term use and cost savings. It is backed by a 1,000,000 mile or 10-year limited warranty, reflecting the manufacturer’s confidence in durability and performance. The flexible frame design and high-quality cotton gauze media contribute to consistent filtration and engine protection over the filter’s service life.