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2005 altima rodents in a/c system Forums > > 2005 altima rodents in a/c system 2005 altima rodents in a/c system
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Altima Nissan Altima Sedan Discussion Forum

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Old 05-27-2021, 11:50 AM
mwganson mwganson is offline
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2005 altima
Join Date: Dec 2007
Posts: 2
Default 2005 altima rodents in a/c system

Rats are getting into my 2005 Nissan Altima's air conditioning system. When I remove the air cabin filter there are rat droppings on top of it. Somehow they're getting into it, but I can't figure out how or where. Is there a diagram of the air filtration system and the pathways the air follows? Does the outside air come in via the vent holes between the hood and the windshield or is it coming in from somewhere else? If I can find where the air comes in perhaps I can put a screen or something there.

I've noticed when looking under the hood they've chewed into the insulation in front of the firewall. is that a potential way into the ducts or is it just solid metal behind the insulation?
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Old 11-05-2021, 02:21 PM
frankr442 frankr442 is offline
Registered User
2005 Altima
Join Date: May 2011
Posts: 19

I also have an '05 with the same problem. First noticed it two years ago. Same idea as you, found diagrams of the ducts in service manual but they didn't really help. I remembered seeing a hole in the cowl when I removed the screen to tighten the wiper linkage bolts, so I cut a piece of screen to cover it. Well, a year later more evidence of mice building a nest. I put a screen on top of the cabin filter before they chew thru that and get farther into the car, but I'm not happy.
If I find that entry point, I'll post it. Please do the same.
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Old 11-24-2021, 07:50 PM
HenryDL HenryDL is offline
2009 Pathfinder
Join Date: Sep 2020
Posts: 27

My uncle recently been dealing with rodents nest on his car. We were take it to the shop last month for tire mounting and balancing and we're surprised to see a nest in the a/c. He tried this rodent repellent and it seems to work.
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a/c, altima, rodents, system

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