K&N® 33-2128 - 33 Series Panel Air Filter

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K&N® - AF-33 Series Air Filter
K&N® - AF-33 Series Air FilterK&N® - AF-33 Series Air Filter - Installation InstructionsK&N® - Cleaning GuideK&N® - Air Filter Overview 602x420K&N Authorized Dealer
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K&N Air Filters

33 Series Panel Air Filter (33-2128) 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.

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


  • 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 70 vehicle(s)
Year Make Model Fitment Notes:
2010 Volkswagen Beetle / Beetle Cabrio
2009 Volkswagen Beetle
2009 Volkswagen Jetta City
2008 Volkswagen Beetle
2008 Volkswagen Golf City
2008 Volkswagen Jetta City
2007 Volkswagen Beetle
2007 Volkswagen Golf City
2007 Volkswagen Jetta City
2006 Audi TT / TT Quattro
  • 1.8L
2006 Volkswagen Beetle
2006 Volkswagen Golf
2006 Volkswagen Golf GTI 1.8T
2005 Audi TT / TT Quattro
  • 1.8L
2005 Seat Leon
2005 Seat Toledo
2005 Volkswagen Beetle
2005 Volkswagen Golf
2005 Volkswagen Golf Gti / Golf GTI 1.8T / Golf GTI VR6
2005 Volkswagen Jetta
  • AWP Engine / BBW Engine / BEV Engine / BEW Engine
2004 Audi TT / TT Quattro
2004 Seat Leon
2004 Seat Toledo
2004 Volkswagen Beetle
2004 Volkswagen Golf
2004 Volkswagen Golf Gti / Golf GTI 1.8T / Golf GTI VR6
2004 Volkswagen Jetta
2003 Audi A3
2003 Audi S3
2003 Audi TT / TT Quattro
2003 Seat Leon
2003 Seat Toledo
2003 Volkswagen Beetle
2003 Volkswagen Golf
  • 1.9L / 2.0L
2003 Volkswagen Golf GTI 1.8T / Golf GTI 20th Anniversary / Golf Gti Turbo / Golf GTI VR6
2003 Volkswagen Jetta
2002 Audi A3
2002 Audi S3
2002 Audi TT / TT Quattro
2002 Seat Leon
2002 Seat Toledo
2002 Volkswagen Beetle
2002 Volkswagen Golf
2002 Volkswagen Golf GTI 1.8T / Golf GTI 337 / Golf Gti Turbo / Golf GTI VR6
2002 Volkswagen Jetta
2001 Audi A3
2001 Audi S3
2001 Audi TT / TT Quattro
2001 Seat Leon
2001 Seat Toledo
2001 Volkswagen Beetle
2001 Volkswagen Golf
2001 Volkswagen Golf Gti GLX
2001 Volkswagen Jetta
2000 Audi A3
2000 Audi S3
2000 Audi TT / TT Quattro
2000 Volkswagen Beetle
2000 Volkswagen Golf
2000 Volkswagen Golf Gti GLX
2000 Volkswagen Jetta
1999 Audi A3
1999 Audi TT
1999 Volkswagen Beetle
1999 Volkswagen Golf
  • 1.9L / 2.0L
1999 Volkswagen Golf Gti / Golf GTI VR6
  • 2.8L
1999 Volkswagen Jetta
  • AEG Engine / AFP Engine / AHU Engine / ALH Engine
1998 Audi A3
1998 Volkswagen Beetle
1998 Volkswagen Golf
  • 1.8L
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K&N® - AF-33 Series Air FilterK&N® 33-2128 - 33 Series Panel Air Filter    $55.99
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