HOW TO CLEAN YOUR K&N AIR FILTER

CHOOSE YOUR FILTER TYPE

Select your air filter type below to view detailed cleaning instructions. If you have any questions about the cleaning process, please contact customer service by calling 800-858-3333 (North America) or emailing tech@knfilters.com.

CLEANING A K&N® OILED COTTON STOCK REPLACEMENT OR UNIVERSAL HIGH-FLOW AIR FILTER

STEP 1 - APPLY K&N® POWER KLEEN®

Liberally spray Power Kleen® filter cleaner onto both sides of the filter and allow to sit for 10 minutes. Do not allow the cleaner to dry on the air filter.

STEP 2 - RINSE YOUR FILTER WITH LOW PRESSURE WATER

Rinse your air filter with cool low-pressure water from the clean side out in order to flush the dirt out of the filter. Continue to rinse the filter until the water runs clear. It may be necessary to repeat steps 1 and 2.

STEP 3 - ALLOW YOUR FILTER TO DRY NATURALLY

After rinsing your filter, gently shake off excess water and allow the filter to dry naturally. Do not apply oil until the air filter is completely dry.

STEP 4 - APPLY K&N® FILTER OIL

When using the air filter oil squeeze bottle found in K&N® filter cleaning kit 99-5050, apply K&N air filter oil evenly along the crown of each pleat. Allow the oil to wick for approximately 20 minutes, and then touch up any light areas on either side of filter until there is a uniform red color on all areas. When using the K&N® air filter oil aerosol spray found in K&N filter cleaning kit 99-5000 or K&N's 12.25 oz aerosol air filter oil, spray the oil evenly along the crown of each pleat while holding the nozzle about 3" away. Allow the oil to wick for approximately 20 minutes. Touch up any light areas on either side of the filter until there is a uniform red color on all areas. Please note that the above process is the only approved procedure for maintaining your K&N® High-Flow Air Filter™.

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CLEANING A K&N® DRYFLOW® AIR FILTER

k&n universal air filter

STEP 1 - REMOVE FILTER

Remove the air filter from the intake pipe, the OE airbox, or the custom assembly. Handling carefully, lightly tap off all loose dirt and debris.

STEP 2 - APPLY CLEANER

Liberally spray K&N® Synthetic Air Filter Cleaner onto both sides of the filter, with the majority of it applied to the dirty side. Allow to soak in for 10 minutes. Do not allow it to dry on the air filter.

STEP 3 - RINSE FILTER

Rinse off the filter element with cool or warm (not hot) water from the clean side out in order to flush the dirt out of the filter. It may be necessary to use your fingers on the hose, to apply light water pressure. Repeat steps 2 and 3, until the water flowing through the media is completely clear of any dirt and debris.

STEP 4 – DRY AND RE-INSTALL FILTER

After rinsing, gently shake off excess water. Allow filter to dry naturally, or use compressed air to speed the drying cycle. The filter should be dry, or just slightly damp before re-installing. Re-install the filter onto the intake system or into the airbox once it is dry. Follow all original installation instructions.

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CLEANING A K&N® SYNTHETIC OUTDOOR EQUIPMENT OR INDUSTRIAL AIR FILTER

STEP 1 - REMOVE FILTER

Remove the air filter from the intake pipe, the OE airbox, or the custom assembly. Handling carefully, lightly tap off all loose dirt and debris.

STEP 2 - APPLY CLEANER

Liberally spray K&N® Synthetic Air Filter Cleaner onto both sides of the filter, with the majority of it applied to the dirty side. Allow to soak in for 10 minutes. Do not allow it to dry on the air filter.

STEP 3 - RINSE FILTER

Rinse off the filter element with cool or warm (not hot) water from the clean side out in order to flush the dirt out of the filter. It may be necessary to use your fingers on the hose, to apply light water pressure. Repeat steps 2 and 3, until the water flowing through the media is completely clear of any dirt and debris.

STEP 4 - DRY AND RE-INSTALL FILTER

After rinsing, gently shake off excess water. Allow filter to dry naturally, or use compressed air to speed the drying cycle. The filter should be dry, or just slightly damp before re-installing. Re-install the filter onto the intake system or into the airbox once it is dry. Follow all original installation instructions.

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CLEANING A K&N® HEAVY DUTY HYBRID AIR FILTER

STEP 1 – REMOVE FILTER

Remove the air filter from the air filter housing. Handling with care, remove loose dirt and debris from the filter by tapping it with your hand and/or spraying it with compressed air. If compressed air is used, blow air from the clean side of the filter to the dirty side.

STEP 2 - APPLY CLEANER

Spray a generous amount of K&N® Heavy Duty Air Filter Cleaner onto both sides of the filter, with the majority of it applied to the dirty side. Allow to soak in for 20 minutes. Do not allow it to dry on the air filter.

STEP 3 - RINSE FILTER

Using a pressure washer or garden hose, begin by rinsing any large dirt particles off of the dirty side of the filter. Then rinse the filter element with cool or warm (not hot) water from the clean side out in order to flush the rest of the dirt out of the filter. Continue rinsing until the water flowing through the media is completely clear of any dirt or debris. Depending on the volume of dirt in the filter, a second or third application of cleaner and rinsing may be required.

STEP 4 - DRY AND RE-INSTALL

After rinsing, gently shake off excess water. Allow filter to dry naturally, or use compressed air to speed the drying cycle. The filter should be dry, or just slightly damp before re-installing. Re-install the air filter element back into the air filter housing of the vehicle, following original installation instructions.

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CLEANING A K&N® WASHABLE CABIN AIR FILTER

STEP 1 - REMOVE FILTER

Remove the K&N cabin air filter from the cabin air filter housing and or cabin air filter tray. Handling with care, remove loose dirt and debris from the filter by tapping it with your hand or against a hard surface.

STEP 2 - APPLY CLEANER

Spray a generous amount of K&N’s specially formulated cabin air filter cleaner onto both sides of the filter, with a majority of it applied to the dirty side. Allow the cleaner to soak in for 10 minutes. Do not allow the cleaner to dry on the cabin air filter.

STEP 3 - RINSE FILTER

Rinse off the filter element with cool or warm (not hot) water from the clean side out in order to flush the dirt out of the filter. It may be necessary to use your fingers on the hose, to apply light water pressure. Repeat steps 2 and 3, until the water flowing through the media is completely clear of any dirt and debris.

STEP 4 - DRY

After rinsing, gently shake off excess water. Allow filter to dry naturally for 20-30 minutes. The filter does not need to be completely dry and can be slightly damp before moving to the next step.

STEP 5 – REFRESH

Apply K&N cabin air filter Refresher™ onto the cabin air filter element. Apply liberally, so that the entire area of the cabin air filter media is treated.

STEP 6 - RE-INSTALL

Re-install the cabin air filter into the filter housing or tray. Follow original installation instructions that were provided with your K&N cabin air filter.

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CLEANING A K&N® LIFETIME WASHABLE HOME AIR FILTER

STEP 1 – REMOVE FILTER

Remove your filter from its housing.

STEP 2 – WET WITH WATER AND APPLY CLEANER

Wet both sides of the filter, and heavily spray K&N® HVAC cleaner onto the dirty side of the filter. Allow the cleaner to sit for 2 to 3 minutes before rinsing with cool, low-pressure water from the clean side of the filter out.

Make sure to use only K&N HVAC filter cleaner, as other cleaners can void your warranty and potentially damage the filter media. Do not use high-pressure nozzles or pressure washers to rinse, as these may also damage the filter.

STEP 3 – RINSE WITH LOW-PRESSURE WATER

Continue to rinse your filter from the wire screen side out until the water runs clear and free from debris.

STEP 4 – GENTLY SHAKE

Gently tap and shake the filter to remove any excess water. Stand the filter on end, and allow it to air dry naturally.

STEP 5 – SPRAY AND REINSTALL

Once the filter is dry, lightly spray cleaner onto the side without the wire screen. Leave the cleaner on the filter, and reinstall your filter into its housing, taking note of the directional arrows on the filter frame.

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FREQUENTLY ASKED QUESTIONS

The service interval for a drop-in replacement K&N® High-Flow Air Filter™ can vary greatly depending on the severity of driving conditions—from 100 miles in a desert-racing environment to up to 50,000 miles under normal highway driving conditions. K&N replacement air filters that fit in the factory air box can go up to 50,000 miles before cleaning is required (under normal highway driving conditions), and the larger conical filters included with K&N air intake systems can go up to 100,000 miles before needing to be cleaned (under normal highway driving conditions). Follow this link to view complete cleaning instructions.

K&N® High-Flow Air Filters™ can be cleaned and re-oiled using a K&N Recharger® kit as often as is reasonably necessary. K&N drop-in replacement High-Flow Air Filters™ typically require servicing once every 50,000 miles under normal highway driving conditions, and the larger filters included with K&N intake systems can go up to 100,000 miles before needing to be cleaned (under normal highway driving conditions). Follow this link to view complete cleaning instructions.

Once you determine your K&N® High-Flow Air Filter™ needs to be cleaned, K&N® air filter cleaning products help restore your air filter to like-new condition. K&N oiled filters require Recharger® kits. Follow this link to view complete cleaning instructions and available products.

Most K&N® cotton air filters come from the factory pre-oiled and ready to install. Certain specialty and racing filters are manufactured as un-oiled filters, and will be clearly indicated as such. Synthetic air filters (such as DRYFLOW® air filters) do not utilize filter oil. Please refer to the Product Specifications on the product details page for your air filter to determine if oil is required, or contact customer service.

When servicing your High-Flow Air Filter™, be sure to follow the re-oiling directions carefully. Use only K&N oil, and never saturate the filter. If oil drips from the filter, allow the filter to sit for several minutes until it stops dripping, and then wipe any excess oil from the filter frame. Follow the oiling instructions included in the Recharger® cleaning kit, and contact customer service if you have questions regarding the oiling process. For the required oil quantity by filter part number, enter the part number in the "Search by Part" box on our Application Search Page, and the factory oil amount will be shown.

Refer to our air filter cleaning and re-oiling procedure for details on how to properly oil your filter once it is clean and dry. For the required oil quantity by filter part number, enter the part number in the "Search by Part" box on our Application Search Page, and the factory oil amount will be shown.

If a tube of sealing grease was included with your air filter, the grease must be used during filter installation to ensure a good seal. Use K&N® sealing grease or lithium-based grease as a substitute. Do not use petroleum-based grease, as it may deteriorate the seal on your air filter.

K&N® does not recommend using other detergents or solvents to clean your air filter, and does not recommend applying any other type of oil. Products other than those manufactured by K&N® have not been tested and may deteriorate the performance and filtering ability of your air filter. Follow this link to view K&N® cleaning product options.

K&N® recommends against using compressed air to dry your air filter, as compressed air may rip and tear the filter fibers. Always allow the filter to dry naturally.

K&N® does not recommend the use of brushes to clean air filters, as the bristles from a brush may rip and degrade the filter media.

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