K&N® 33-2031-2 - 33 Series Panel Red Air Filter (11" L x 6.563" W x 1.125" H)

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Product Details

K&N Air Filters

33 Series Panel Red Air Filter (33-2031-2) by K&N®. K&N's replacement air filters are designed to increase horsepower and acceleration while providing excellent filtration. K&N makes 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. K&N stock replacement air filters for street vehicles are covered by K&N famous K&N Million-Mile Limited Warranty and will be the last air filter your vehicle will ever need.

K&N - F.A.Q.K&N - Air Filter CleaningK&N - Warranty


Filter Types: Direct Fit Filter
Filter Shape: Panel
Filter Style: Non-Flanged
Filter Color: Red
Filter Outside Width: 6.563"
Filter Outside Length: 11"
Filter Height: 1.125"
Air Filter Material: Cotton Gauze
Filter Re-Oiling Amount: 1.06oz


  • Designed to boost horsepower and rate of acceleration
  • Can be cleaned and used again
  • High air flow with exceptional filtration
  • Lasts up to 50,000 miles before cleaning is required depending on driving conditions
  • Works with original equipment manufacturer vehicle electronics
  • Emissions legal in all 50 US states
  • Will NOT void vehicle warranty
  • Million Mile Limited Warranty®


  • 1 Air Filter

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

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.

K&N wants 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. K&N also want you to feel confident that even if you experience difficulties with a dealership repair department, K&N 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

2017 Nissan Altima
  • 3.5L
2017 Nissan Maxima 
2017 Nissan Murano 
2017 Nissan Pathfinder 
2017 Nissan Quest 
2016 Infiniti QX60
  • 3.5L
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 
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
  • 3.3L
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 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
  • E / G Engine VIN Character
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
  • E / G Engine VIN Character
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
  • E / G Engine VIN Character
1991 Nissan Stanza 
1990 Infiniti M30 
1990 Nissan 240SX 
1990 Nissan Axxess 
1990 Nissan Maxima 
1990 Nissan Pathfinder 
1990 Nissan D21
  • 3.0L
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
  • H Engine VIN Character
1987 Nissan Pulsar NX 
1984 Nissan Maxima 
1983 Nissan Maxima 
1982 Nissan Maxima 
1981 Nissan 810 

Product Reviews


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K&N® - 33 Series Air Filter
K&N® 33-2031-2 - 33 Series Panel Red Air Filter (11" L x 6.563" W x 1.125" H)
Average Rating: 5 of 5
5 of 5
Easy to Install
K&N® - 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? YesThis review was helpful for 2 users!

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