K&N® 33-2106-1 - 33 Series Panel Air Filter

52 reviews / Item # mpn1918839
K&N® - 33 Series Air FilterK&N® - 33 Series Air FilterK&N® - 33 Series Air Filter - Installation InstructionsK&N® - 33 Series Air Filter Airflow TestK&N® - Cleaning GuideK&N® - Air Filter Overview 602x420K&N Authorized DealerK&N Special OffersK&N Special OffersK&N Special Offers
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K&N Air Filters

33 Series Panel Air Filter (33-2106-1) by K&N®. A K&N 33 series OE replacement air filter is designed to increase horsepower and acceleration. These washable and reusable panel air filters are easy to install because they fit directly into the existing vehicle factory air box.

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  • 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:

Vehicle Fitment

This part is compatible with 44 vehicle(s)
Year Make Model Fitment Notes:
2011 Ford Ranger
2010 Ford Ranger
2009 Ford Ranger
2009 Mazda B-Series
2008 Ford Ranger
2008 Mazda B-Series
2007 Ford Ranger
2007 Mazda B-Series
2006 Ford Ranger
2006 Mazda B-Series
2005 Ford Ranger
2005 Ford Sport Trac
2005 Mazda B-Series
2004 Ford Explorer
  • XLS Sport / XLT Sport 4.0L
2004 Ford Ranger
2004 Ford Sport Trac
2004 Mazda B-Series
2003 Ford Explorer
  • Sport / Sport XLS / Sport XLT
2003 Ford Ranger
2003 Ford Sport Trac
2003 Mazda B-Series
2002 Ford Explorer
  • Sport
2002 Ford Ranger
2002 Ford Sport Trac
2002 Mazda B-Series
2001 Ford Explorer
2001 Ford Ranger
2001 Ford Sport Trac
2001 Mazda B-Series
2001 Mercury Mountaineer
2000 Ford Explorer
2000 Ford Ranger
2000 Mazda B-Series
2000 Mercury Mountaineer
1999 Ford Explorer
1999 Ford Ranger
1999 Mazda B-Series
1999 Mercury Mountaineer
1998 Ford Explorer
1998 Ford Ranger
1998 Mazda B-Series
1998 Mercury Mountaineer
1997 Ford Explorer
1997 Mercury Mountaineer
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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 Air Filter
K&N® 33-2106-1 - 33 Series Panel Air Filter
Average Rating: 4.9 of 5
4.8 of 5
K&N Air Filter
2000 Mercury Mountaineer / Posted by (Sweeny, TX) /

My Mercury Mountineer runs great. It's faster, picks up faster, and a little more horsepower.

Was this review helpful for you? Yes1   people found this review helpful.
5 of 5
2011 Ford Ranger / Posted by (Sandy, OR) /

Great fit, super fast shipping.

Was this review helpful for you? Yes6   people found this review helpful.
K&N® - 33 Series Air FilterK&N® 33-2106-1 - 33 Series Panel Air Filter    $51.99
52 reviews
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