Under the front seats
There is no cabin air filter on an 03 Navigator
I would say NO ( I was looking at the 2001 Lincoln Navigator Owner Guide and it does not show anything about it having a cabin air filter )
http://www.autopartsource.com/catalog/7704.pdf I found a link with directions on how to replace the cabin filter on a Lincoln Navigator. It states it should take approximately 15 minutes to do the job. Pages 49-50 of this pdf file give directions along with drawings on replacing the filter for models 1998-2005 of the Lincoln Navigator.
No. The climate control seats do.
The cabin air filter in the 1998 Lincoln Mark is located behind the glove box. The glove box will need to be removed to get to the filter.
In the 2008 Lincoln Navigator, the cabin air filter is located behind the glove compartment. To access it, you need to open the glove compartment, remove any contents, and then detach the stops or hinges to allow it to drop down fully. The filter housing is situated behind the compartment, typically requiring you to remove a cover to reach the filter itself.
I don't think the 98 Nav has one! my has the whole were the filter goes, but is blank off the is nothing in it.
there is not cabin filter in Lincoln town car.
take off the glove box, its in the black box behind it.
The cabin air filter on a 2009 Lincoln Town Car is located behind the glove compartment. To access it, you need to remove the glove compartment by detaching any screws and gently pulling it down. Once the glove compartment is out of the way, you can find the filter housing, allowing you to replace the cabin air filter.
In the 2007 Lincoln MKZ, the cabin air filter is located behind the glove compartment. To access it, you need to open the glove compartment, remove any contents, and then detach the glove compartment door by releasing the stops or hinges. Once the glove compartment is out of the way, you can reach the filter cover, which can be removed to replace the cabin air filter.