Remember that a rodent can get into a space as small in size as its  
skull. Not its head; its skull. That means it can get into what seem  
to us to be impossibly small openings.  (from RATS, by Robert  
Sullivan)  Cars are not tightly constructed, and mice can easily climb  
what seem to us slick surfaces.  A car, for a mouse or two is just a  
great big old  jungle gym with nice human odors.   joan

On Feb 26, 2009, at 9:14 AM, Linda Feltner wrote:

> I was told my a neighbor (a really nice one) that they had the same  
> problem in their Toyota. There is an exaust vent apparently, that  
> connects to the cabin filter, and they get in that way, and build in  
> the cabin filter. That still doesn't explain how they go in the car,  
> because the filter didn't stop it. He suggeted putting a screen on  
> the hole, but I dunno where it is.