[flunkysama]

You might want to check your air filter box. If they could get into the air intake they probably left a mess in there. If one went down into the resonator and could not get back out... you'll probably be smelling that now.

 

[flunkysama]

Re: mice outta the air intake

Now, how're they getting into the cab?
Berk

Unfortunately the answer is almost anywhere. Mice can fit through extremely small openings. If you can stick your finger though the opening, a mouse can get in. The obvious ones are:
#The cabin air intake. Usually located at the base of windshield, by the windshield wipers, towards the passenger side. You might try leave the heater/AC in recirc mode to block them, though I doubt it will help.
#The holes in the firewall for steering, wires, hoses, etc.
#The cabin air outlet. Located inside the rear bumper above the tailpipe. I don't know if it is accessable from the inside. The picture in the service manual makes it look one of those vinyl dryer vents you'd find on a house.
# There might be some drain holes, but I don't know where they are.

Actually, what would help the most is to try to get rid of any food source near your car if possible. (or park your car in a different spot)

There's no love lost between myself and mice. They get trapped in my walls, die and stink for weeks. I'd put out poison for them, but I'd be afraid about poisoning the owls or cats that might eat their carcass.

If you like mice, maybe you should put out something they'll like to nest in more than your car.