K&N® 33-2031-2 - 33 Series Panel Air Filter

51 review / Item # mpn1920836
K&N® - 33 Series Panel Air Filter
K&N® - 33 Series Panel Air FilterK&N® - 33 Series Panel Air FilterK&N® - 33 Series Panel Air Filter Installation InstructionsK&N® - 33 Series Panel Air Filter Dyno ChartK&N® - 33 Series Panel Air Filter InformationK&N® - Cleaning GuideK&N® - WarrantyK&N® - Air Filter Overview 602x420Made In USAK&N Authorized Dealer
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Product Details

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K&N Air Filters

33 Series Panel Air Filter (33-2031-2) by K&N®. Air Filter Color: Red. Filter Material: Cotton Gauze. Filter Re-Oiling Amount: 1.06 oz (31 ml). Height: 1.125" (29 mm). Outside Length: 11" (279 mm). Outside Width: 6.563" (167 mm). Includes: 1 Air Filter. K&N's replacement air filters are designed to increase horsepower and acceleration while providing excellent filtration. We make over 1,200 different replacement air filters for the majority of vehicles on the road. These filters are washable and reusable and are custom designed to fit into your existing factory air box. Their drop-in design means adding performance is simple. With most vehicles you simply remove the disposable air filter and replace it with a K&N. See applicable instruction sheet for details. Our stock replacement air filters for street vehicles are covered by our famous K&N Million-Mile Limited Warranty and will be the last air filter your vehicle will ever need.


  • Improves engine airflow
  • Increases horsepower and acceleration
  • Superior filtration without reduced airflow
  • Reduces maintenance costs
  • Washable and reusable
  • Get up to 50,000 miles between cleanings under normal driving conditions
  • Emissions legal in all States
  • Backed by K&N's Million Mile Limited Warranty

Most air filters on the market are a compromise. Many high-performance filters deliver better airflow, but sacrifice filtering ability and engine protection in the process. OEM filters, which are usually made of paper, filter adequately but at the expense of airflow. And airflow decreases as these air filters become dirty. Not so the K&N air filter. K&N air filters increase airflow without decreasing filtration ability, and the increased airflow remains consistent throughout the filter's service interval. The secret is in the K&N filter's construction.

K&N's initial goal was to develop a filter that would deliver increased airflow during dirty, dusty off-road racing conditions. Increased airflow improves the efficiency of the combustion process, increasing horsepower and torque. But just increasing airflow without ensuring adequate filtration under those conditions would result in a ruined engine. K&N's solution was a filter design consisting of 4 to 6 layers of cotton gauze sandwiched between two aluminum wire screens. The cotton is then treated with a specially formulated grade of oil that causes tackiness throughout the cotton’s microscopic strands. The resulting K&N filter not only delivers increased airflow while trapping dirt particles that could harm your engine, that level of airflow is maintained even as the filter gets dirty. The layers of oiled cotton fibers in the K&N filter trap dirt particles that are smaller than the holes in the filter media. The thickness of the layers also allows the K&N filter to trap dirt and dust on many levels, trapping more dirt without decreasing airflow. Contrast this with a paper filter that only traps dirt on its surface; as the surface area becomes clogged, the airflow rate goes down.

Each K&N air filter is custom designed to fit into your existing factory air box. The K&N filter is economical because it's the last air filter you'll have to buy for your car. It can be washed and reused many times, and since you can usually drive up to 50,000 miles between servicing, you won't have to clean it very often. And every K&N filter is backed by K&N's Million Mile Limited Warranty. By the way, check the CARiD reviews and read what the customers think of K&N porducts.

K&N® is the inventor and leading innovator of reusable cotton gauze filter technology for automotive applications. The first K&N filter was conceived for racing over 40 years ago and a performance enthusiast mindset continues today throughout all levels of the company. K&N is the sales and brand leader for performance filters, including an extensive line of factory replacement filters and performance air intake kits. The company actively promotes the environmental, economical and performance advantages of long-life reusable cotton gauze filters.

Part Number:

Warranty Information

Find out everything you need to know about the product warranty

K & N O/E Replacement Air Filters and Air Intake Systems purchased from Authorized Dealers are backed by a Million Mile Limited Warranty when used primarily on paved roads and on vehicles for which they were designed. If one of these products ever fails to provide complete satisfaction, K&N will replace it.

K&N Aftermarket Air Filters should be cleaned every 50,000 miles for normal highway use, more often in dusty conditions. Cleaning should be done with K&N cleaner and air filter oil (or comparable air filter cleaner and oil). Use of compressed air, or chemicals not specifically designed to clean and re-oil cotton air filters (i.e. gasoline, transmission fluid, motor oil, lightweight oil, or diesel fuel) will void the warranty. Any damaged, abused or modified K&N Air Filters will not be warranted.

Any K&N product returned to K&N will need a Return Goods Authorization number and must be sent at customers' expense along with proof of purchase.

Any defective K&N Air Filter properly returned to K&N will be replaced. K&N reserves the right to determine whether the terms of the warranty, set out above, have been properly complied with. In the event that the terms are not complied with, K&N shall be under no obligation to honor this warranty. K&N will not be responsible for any indirect, consequential, special, contingent, or other damages.

We want to make sure that when you buy a K&N Lifetime Air Filter or Air Intake System, you can be confident your vehicle's warranty will not be impacted. We also want you to feel confident that even if you experience difficulties with a dealership repair department, we will step-in and resolve the issue, so you won't have to. Therefore, K & N makes the following Pledge: K&N pledges to their customers that they will not be taken advantage of and charged for a repair due to a manufacturer warranty denial blamed on the presence of a K&N product.

Magnuson-Moss Warranty Act:
Legally, a vehicle manufacturer cannot void the warranty on a vehicle due to an aftermarket part unless they can prove that the aftermarket part caused or contributed to the failure in the vehicle (per the Magnuson Moss Warranty Act (15 U.S.C. 2302(C)) Learn More

Vehicle Fitment

This part is compatible with 221 vehicle(s)
Year Make Model Fitment Notes:
2017 Nissan Maxima
2016 Nissan Altima
  • 3.5L
2016 Nissan Maxima
2016 Nissan Murano
  • 3.5L
2016 Nissan Pathfinder
2016 Nissan Quest
2015 Infiniti QX60
  • 3.5L
2015 Nissan Altima
  • 3.5L
2015 Nissan Murano
2015 Nissan Pathfinder
2015 Nissan Quest
2014 Infiniti QX60
  • 3.5L
2014 Nissan Altima
  • 3.5L
2014 Nissan Maxima
2014 Nissan Murano
2014 Nissan Pathfinder
  • 3.5L
2014 Nissan Quest
2013 Infiniti JX
2013 Nissan Altima
  • 3.5L
2013 Nissan Maxima
2013 Nissan Murano
2013 Nissan Pathfinder
2013 Nissan Quest
2012 Nissan Altima
  • 3.5L
2012 Nissan Maxima
2012 Nissan Murano
2012 Nissan Quest
2011 Nissan Altima
  • 3.5L
2011 Nissan Maxima
2011 Nissan Murano
2011 Nissan Quest
2010 Nissan Altima
  • 3.5L
2010 Nissan Maxima
2010 Nissan Murano
2009 Nissan Altima
  • 3.5L
2009 Nissan Maxima
2009 Nissan Murano
2009 Nissan Quest
2008 Infiniti FX35
2008 Nissan Altima
  • 3.5L
2008 Nissan Maxima
2008 Nissan Murano
2008 Nissan Quest
2007 Infiniti FX35
2007 Infiniti G35
  • Coupe
2007 Nissan Altima
  • 3.5L
2007 Nissan Maxima
2007 Nissan Murano
2007 Nissan Quest
2006 Infiniti FX35
2006 Infiniti G35
2006 Nissan 350Z
2006 Nissan Altima
2006 Nissan Maxima
2006 Nissan Murano
2006 Nissan Quest
2006 Nissan Sentra
2006 Nissan X-TRAIL
2005 Infiniti FX35
2005 Infiniti G35
2005 Nissan 350Z
2005 Nissan Altima
2005 Nissan Maxima
2005 Nissan Murano
2005 Nissan Quest
2005 Nissan Sentra
2005 Nissan X-TRAIL
2004 Infiniti FX35
2004 Infiniti G35
2004 Infiniti I35
2004 Nissan 350Z
2004 Nissan Altima
2004 Nissan Frontier
  • 3.3L
2004 Nissan Maxima
2004 Nissan Murano
2004 Nissan Pathfinder
  • 3462 CC / 3498 CC
2004 Nissan Quest
2004 Nissan Sentra
2004 Nissan X-TRAIL
2004 Nissan Xterra
  • 3.3L
2003 Infiniti FX35
2003 Infiniti G35
2003 Infiniti I35
2003 Infiniti QX4
2003 Nissan 350Z
2003 Nissan Altima
2003 Nissan Frontier
  • 3.3L
2003 Nissan Maxima
  • 3.5L
2003 Nissan Murano
2003 Nissan Pathfinder
2003 Nissan Sentra
2003 Nissan X-TRAIL
2003 Nissan Xterra
  • 3.3L
2002 Infiniti G20
2002 Infiniti I35
2002 Infiniti QX4
2002 Nissan Altima
2002 Nissan Frontier
  • 3.3L
2002 Nissan Maxima
  • 3.5L
2002 Nissan Pathfinder
2002 Nissan Sentra
2002 Nissan Xterra
  • 3.3L
2001 Infiniti G20
2001 Infiniti I30
2001 Infiniti Q45
2001 Infiniti QX4
2001 Nissan Altima
2001 Nissan Frontier
  • 3.3L
2001 Nissan Maxima
2001 Nissan Pathfinder
2001 Nissan Sentra
2001 Nissan Xterra
  • 3.3L
2000 Infiniti G20
2000 Infiniti I30
2000 Infiniti QX4
2000 Nissan Altima
2000 Nissan Frontier
  • 3.3L
2000 Nissan Maxima
2000 Nissan Pathfinder
2000 Nissan Sentra
  • 1.8L / 2.0L
2000 Nissan Xterra
  • 3.3L
1999 Infiniti G20
1999 Infiniti I30
1999 Infiniti QX4
1999 Nissan Altima
1999 Nissan Frontier
  • 3.3L
1999 Nissan Maxima
1999 Nissan Pathfinder
1999 Nissan Sentra
1998 Infiniti I30
1998 Infiniti QX4
1998 Nissan 200SX
1998 Nissan 240SX
1998 Nissan Altima
1998 Nissan Maxima
1998 Nissan Pathfinder
1998 Nissan Sentra
1997 Infiniti I30
1997 Infiniti J30
1997 Infiniti QX4
1997 Nissan 200SX
1997 Nissan 240SX
1997 Nissan Altima
1997 Nissan Maxima
1997 Nissan Pathfinder
1997 Nissan Sentra
  • 1.6L
1996 Infiniti G20
1996 Infiniti I30
1996 Infiniti J30
1996 Nissan 200SX
1996 Nissan 240SX
1996 Nissan Altima
1996 Nissan Maxima
1996 Nissan Pathfinder
1996 Nissan Pick Up
  • 3.0L
1996 Nissan Sentra
  • 1.6L
1995 Infiniti G20
1995 Infiniti J30
1995 Nissan 200SX
1995 Nissan 240SX
1995 Nissan Altima
1995 Nissan Axxess
1995 Nissan Maxima
1995 Nissan Pathfinder
1995 Nissan Pick Up
  • 3.0L
1995 Nissan Sentra
1994 Infiniti G20
1994 Infiniti J30
1994 Nissan 240SX
1994 Nissan Altima
1994 Nissan Maxima
1994 Nissan Pathfinder
1994 Nissan D21
  • 3.0L
1994 Nissan Sentra
1993 Infiniti G20
1993 Infiniti J30
1993 Nissan 240SX
1993 Nissan Altima
1993 Nissan Maxima
1993 Nissan NX
1993 Nissan Pathfinder
1993 Nissan D21
  • 3.0L
1993 Nissan Sentra
1992 Infiniti G20
1992 Infiniti M30
1992 Nissan 240SX
1992 Nissan Maxima
1992 Nissan NX
1992 Nissan Pathfinder
1992 Nissan D21
  • 3.0L
1992 Nissan Sentra
1992 Nissan Stanza
1991 Infiniti G20
1991 Infiniti M30
1991 Nissan 240SX
1991 Nissan Axxess
1991 Nissan Maxima
1991 Nissan NX
1991 Nissan Pathfinder
1991 Nissan D21
  • 3.0L
1991 Nissan Sentra
1991 Nissan Stanza
1990 Infiniti M30
1990 Nissan 240SX
1990 Nissan Axxess
1990 Nissan Maxima
1990 Nissan Pathfinder
  • With Panel Filter
1990 Nissan D21
  • 3.0L With Panel Filter
1990 Nissan Stanza
1989 Nissan 240SX
1989 Nissan 300ZX
1989 Nissan Maxima
1989 Nissan Pulsar NX
  • 1.8L
1988 Nissan 300ZX
1988 Nissan Pulsar NX
  • 1.8L
1987 Nissan 300ZX
  • Naturally Aspirated
1987 Nissan Pulsar NX
  • With Panel Filter
1984 Nissan Maxima
1983 Nissan Maxima
1982 Nissan Maxima
1981 Nissan 810

Product Reviews


Every Customer can leave a review about our service and the product that was purchased. In order to leave your review for your new product, please follow the link in the email you receive after completing your purchase. You can rate appearance, ease of installation, price/value and product quality.

K&N® - 33 Series Panel Air Filter
K&N® 33-2031-2 - 33 Series Panel Air Filter
Average Rating: 5 of 5
5 of 5
Easy to Install
K&N® 33-2031-2 - 33 Series Panel Air Filter
The filter was very to install and it fits perfectly. The quality seem well built. And I noticed some improvements when I'm driving my Z, such as smoother take off, and more kicks during high rpm.
YPosted by (Seymour, TN) /
2006 Nissan 350Z
Was this review helpful for you? Yes2  people found this review helpful.

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