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Mouse Nest in Cabin Air Filter

Discussion in 'Gen 4 Prius Main Forum' started by Hybrid Rules, Jul 25, 2018.

  1. Hybrid Rules

    Hybrid Rules New Member

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    Location:
    Trenton, NJ
    Vehicle:
    2016 Prius
    Model:
    Two Eco
    We bought Prius 2016 Two Eco as a new car in Feb. 2016. Within these 2 years and 5 months, we had to replace the cabin air filter twice due to some repeated rodent infestation. We park it outside in a wooded front yard in a suburb of NJ.
    - June 2017, the dealer mechanics found the evidence of some animal living in it (crashed acorns, etc.) without actual animal in it. When I asked how I can prevent this to happen again, the dealer rep told me there is nothing we can do about animal entries. However, a customer who was near me told me to shut the vent before leaving he car. I was not totally religious about shutting the vent to tell the truth.
    - The 2nd time (July 2018), I took the car to the dealer for 30, 000 service plus this offensive smell with A/C use. The dealer mechanics found an actual dead mouse as shown here in the photo. I requested a mechanics and asked him about what I can do to prevent the rodent entries to the cabin filer area. He suggested:
    1) place some moth balls in the hood to deter rodents
    2) shut the vent every time before turning off the engine
    I appreciated both suggestions as I do not wish to use any toxins to manage this concern. I asked further if there is any particular entry points that we can put a metal net/grid, etc. He seemed to be considering that be a possibility, but indicated to me that there were so many places and may not be able to proof it that way. Then suggested me to google it for any other approaches.

    When we owned 2nd generation Prius (2009), we did not have any rodent entries at all even during the last 3 years when the car was parked at the exact space for the above Prius 2016. So I wonder if the way Prius 2016 is made is different from other generations of Prius. I read mouse complete proofing forum post, I believe in 3rd gen. Prius chat, but I wonder if the dealer would ever consider offering such service to the customers in future or just keep replacing the filter and sanitizing A/C system every time this happens. I understand that there are millions of rodents and millions of cars, but does Prius 2016 have a significantly higher rodent entry rate than other cars?
    Two Eco is great and it runs currently 60.3 mpg even I drive mostly highways. This is an improvement from 2nd generation Prius in terms of mpg, but this rodent issue be recurrent as we have to park this car outside. IMG_4301(2)[1].jpg
     
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  2. goldfinger

    goldfinger Active Member

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    Location:
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    Vehicle:
    2016 Prius
    Model:
    Three
    You need a cat.
     
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  3. Consider yourself fortunate that it wasn't worse, like, chewed wires and replaced sensors. Back when I had a jeep, squirrels chewed through some of the wiring. Cute buggers cost me $450, but to compensate for my expense, they left me a present: an air compartment thingy full of acorns...

    Edit: Oh and to anyone who didn't think that squirrels cause damage, here's from my mud neck of the woods, a'ight?
    Emera Maine : Squirrel caused Brewer power outage that affected some traffic lights | 4-Traders
     
    #3 Deleted member 111882, Jul 27, 2018
    Last edited by a moderator: Jul 27, 2018
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  4. bisco

    bisco cookie crumbler

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    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    welcome!

    gen2 and 3 have had major infestation problems. that's why you found directions to block them.
    dealership will never offer this service, but you might ask local mechanics. a lot of time is involved, and might be of interest to them.
    it won't be cheap though, if you don't want to diy.

    your biggest concern is not the filter and sanitization, it is the potential for having to replace a $7,000. wiring harness.

    all the best!(y)
     
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  5. alanclarkeau

    alanclarkeau Senior Member

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    Not the only ones with this problem - (though a later report says it was actually Woodpeckers that did it - but they've attached the early YouTube which attributed it to squirrels)
    Meet the Bird that Filled an Antenna With Acorns
     
  6. MichelleStone

    MichelleStone Senior Member

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    Location:
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    Vehicle:
    2016 Prius
    Model:
    Four
    I have a rodent problem in my area. So far I've been able to keep them out of the house but they do get in my garage where I park my car. I do have a question:

    How do you close the vent before turning off the engine? I'll start doing it if I know how.

    Thanks!
     
  7. The Professor

    The Professor Senior Member

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    Vehicle:
    2017 Prius
    Model:
    Excel
    Unless you've changed the default option, the car will automatically open the vent when you switch the ignition off. I spotted this in my Carista Settings...

    Open vents to outside air when ignition is turned off
    *YES* / NO
     
  8. The Electric Me

    The Electric Me Go Speed Go!

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    Evil Toyota.
    Lures the poor innocents in with easy access venting, and soy based wiring, and easy to shred and tasty air filters. Next thing you know, Vern the newest Repair Tech, is calling everyone around to take a look at what he found.
    Who knew Hybrid Synergy Drive was also a complicated rodent maze and deadly mouse trap?

    However, that would explain the offensive odor upon AC usage.

    Sorry to make light...seen enough posts to know this is a serious problem for many.
    But I think that photo alone will force me into overly obsessive air filter checking.
     
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  9. Smaug1

    Smaug1 Member

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    Hi all. I had a mouse nest in my Accord's cabin air filter last time. We have an older house, and we cannot reasonably keep them out. So my cheap and simple solution is to just put a couple of mouse traps in the garage where I find "mouse sign." (turds, dark yellow pee marks, nesting evidence)

    Get a couple of the Victor mouse traps with the yellow cheese-looking trigger plate "EasySet" and put peanut butter on it. The classic Victor traps with the copper bate plate don't work nearly as well, and are hard to resist because they're sold in more economical multi packs.

    Anyway, the first month I started doing this, I got about 8 mice. The next month 3. Now, it's down to maybe 1 per month. I expect it'll go up again when winter hits and they're looking for a warm place. I don't even have to re-bait, except about every 5 mice.

    If you park outdoors, get a couple of rat traps baited with peanut butter. These will take care of chipmunks and rats and half the time they'll kill a squirrel too. Then mouse traps too. The rodents would smell the PB and go for that WAY before they'd think of nesting in your car.

    As for squirrels, one of my hobbies is high-end air rifles. We had a real squirrel problem when I moved into this house two years ago. The first summer, I shot 46 squirrels in our back yard. The next year: 28. This year, only about 12 so far. I can hit them in the lungs from 50 yards or in the head out to 25 yards. If you're within about 30 miles of me, I'll come and take care of them for you; just drop me a line. I'm a crack shot. I know it sounds hillbilly, but it works and it sure beats having to deal with them after trapping them or having them cause thousands of dollars' worth of damage to your house or car. I put some bait down in front of a safe backstop. They love corn, sunflower seeds and of course peanuts. (but peanuts are too expensive for tree rats) Then, wait for them to come and drill them one by one.

    Here's the good mouse traps I'm talking about:
    Victor® Easy Set® Mouse Trap | Model # BM032-24 | VictorPest.com
     
  10. What about glue traps with a dash of sugar and leftover chocolate chip cookie crumbs? Super easy mouse traps to set, will never slam shut on your fingers like a spring trap, and you can add any bait you want. I caught two mice in my kitchen that way, since apparently mice love the sugar.
     
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  11. alanclarkeau

    alanclarkeau Senior Member

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    We had a mouse and rat problem at one stage in a school where I was Business Manager - an old farmer suggested PEPPERONI or similar sausage.

    I could see why after we set ½ doz traps - even I could smell the sausage when I went into the area - we caught 5 rats/mice first night with 6 traps.
     
  12. Lucifer

    Lucifer Senior Member

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    Give those rodents some cheese, they haven’t yet eaten your soy covered electrical system.

    Years ago I found a rats nest on my ram ecodiesel battery and sings of rodents in my prius.
    I got three three dollars total ultrasonic rodent repelant thingies, never another problem.
     
  13. alanclarkeau

    alanclarkeau Senior Member

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    We found that they aren't particularly attracted to cheese - apart from a strong smelling one (like blue vein).