The Volkswagen New Beetle made its debut in 1998, and remained relatively unchanged through 2006. All Beetle models in this span came equipped with an interior pollen filter (also called a microfilter or cabin air filter). In most cases, this filter is mounted behind the glove box, or underneath the front cowl cover in the engine bay. The Beetle's unique design does not allow the filter to be accessed from these locations; instead, a portion of the dash panel must be removed to access and replace the pollen filter.
Push down and forward on the centre dash trim piece (the raised trim piece) to unhook the clips; pull this trim off and set it aside.
Remove the three hex head screws behind the centre dash trim. These screws secure the passenger side dash cover. Pull the passenger side dash cover off carefully; unplug the connection behind it (dash light) and set it to the side; this will expose the pollen filter access cover.
Remove the six hex head screws from the pollen filter access cover. Lift the cover and set it to the side.
Press the tab on the left part of the filter tray with your finger; carefully pull out the filter tray. Remove the old pollen filter from the tray; insert the new filter in its place.
Re-insert the filter tray into its mount. Push it in firmly to snap it in. Position the filter access cover back in place; tighten the six hex head screws.
Re-attach the passenger side dash cover; plug in the dash light connection. Tighten the three hex head screws. Push the centre dash trim piece back into place to finish.
The replacement interval is every 10,000 miles or 12 months, whichever comes first.