Introduction
The cabin air filter in your vehicle helps to ensure that there is a proper ventilation system for the health and safety of all passengers. Without a working cabin air filter, the air inside of a vehicle's cabin is prone to having higher levels of harmful and odorous exhaust gases than the air outside of the cabin. The 2005-2011 Volkswagen Jetta’s cabin air filter is located differently compared to most cars.
Tools
Parts
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            Once the door is open locate the blower motor housing, which will be located below the glove compartment and behind the black foam cover. 
 
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            Using a flat-head screw driver, remove the 2 screws on the foam cover by screwing counter clockwise. Store the screws in a safe place. 
 
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            Depending on the condition of the filter you can either vacuum or replace with new filter. Vacuum dirty filter or remove packaging on new filter. 
 
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To reassemble your device, follow these instructions in reverse order.