Mouse Blocker Classic

Rated 5.00 out of 5 based on 4 customer ratings
(9 customer reviews)


MouseBlocker Classic Instructions
– Simple 2 or 3 wire hookup direct to battery or 12V power source
– 12 Volt DC power requirements
– The worlds first ultra sonic deterrent dedicated to automobiles
– Low amp draw to keep your battery charged
– Powerful at 85db
– Only 0.1 Watt draw for long run times on a battery

Bulk Discounts!
2-4 Units Save 5%
5+ Units Save 10%



The Mouse Blocker is the worlds first ultrasonic mouse deterrent dedicated to automobiles. The Mouse Blocker is a 12 Volt powered device releasing an ultrahigh frequency noise (that sounds like a jackhammer to humans) to deter mice from nesting inside your automobile. The Mouse Blocker is designed to protect automobiles from clogged or blocked interior areas, which can ultimately result in severe damage to your vehicle. The Mouse Blocker runs exclusively off a vehicle’s 12V battery or anywhere with a 12V power supply so you don’t have to worry about leaking flashlight batteries or extension cords.
The MouseBlocker installs in your engine compartment and is designed to be stable in this harsh environment. Safe at under high under hood temperatures, stable at well below zero Canadian winters and unaffected by moisture and dampness associated with exterior operation. Stable in areas of heavy vibrations like tractors and mowers and compact enough (about the size of a deck of playing cards) to hide almost anywhere.

We have sold this unit for years with thousands of success stories all over the globe.

Use what the Pros use:

Trusted and Installed at hundreds of:
*New and Used car dealers
*Tractor and farm equipment sales and supply stores
*RV and Camper dealers
*Motorcycle and ATV dealers
*Independent speed shops and repair centers
*Low draw on the battery at less than .1 watt

Don’t trust your vehicle to anything else, Protect your vehicle today with a MouseBlocker!!

9 reviews for Mouse Blocker Classic

  1. Rated 5 out of 5


    Living in the boondocks, I’ve always had problems with squirrels in my vehicles. After spending thousands to repair my brand new Toyota Tundra’s wiring harness, I’ve finally found a solution. I cannot thank you guys enough for the excellent products and support.

  2. Rated 5 out of 5


    Every spring we had to make the same repair to our Honda Goldwing motorcycle. Airbox filled with acorns and birdseed and then track down the damaged wiring causing the bike to run poorly. Since installing the Mouse Blocker 4 years ago we have not had any problems. Today we are ordering another unit for my wifes new Toyota.


    5.0 out of 5 starsNo more mice!
    By Carvex on February 1, 2014
    Verified Purchase
    I am a professional mechanic specializing in vehicle electronics. Mouseblocker is a well made product that works well for keeping mice away. I installed it in my personal vehicle after finding a large mouse nest on top of my cabin air filter, after trying dryer sheets. I was unable to use dCon due to pets around the house. Actual installation was very easy, with only minor wiring. I have had it installed for a few weeks and all traces of mice are gone.

    A few things I would recommend however. The device and attached fuse are not weatherproof. I installed it under the hood permanently and live in a location where salt is used on the roads 6 months of the year. For the price, I personally would not take a chance of leaving the wire hole in the device open and a non-weatherproof fuse in such a hostile environment. However it is perfect as-is for winter storage.

    I used a dab of sealant to fill the wire hole and changed the fuse holder to a weatherproof one, being that it is a 200mA glass fuse and blade type fuses are not available that small. The device is still audible with the hood shut, but is very high pitched and will not bother your ears nor your pets.

    It will work great for keeping mice out of your car and is simple enough to install even for people with very little electrical knowledge.

  4. veganman

    5.0 out of 5 starsGoodby to Pack Rats in Arizona
    By Veganman on March 28, 2016
    When I retired, I bought a Ford Ranger. It sits outside in Arizona where pack rats are notorious for chewing wiring and hoses, and sure enough, I had some vacuum lines chewed in the first few weeks. I fixed those and within another few weeks, more lines were chewed. This happened three times (thankfully, they never chewed any wiring under the hood). Finally I went online to find some product that would eliminate this problem. I bought Mouse Blocker direct from the company and installed it under the hood. That was nearly two years ago and I haven’t had any further damage from rodents. I rate this a big success…

  5. WYO1

    5.0 out of 5 starsFound damage to my truck after a hunting trip. …
    By WYO1 on February 16, 2015
    Verified Purchase
    Found damage to my truck after a hunting trip. The mice took shelter under the hood during a 3 day rain storm. Had to stop the nesting before they turned the electrical into dinner. They used the fiberglass for the nest material.

    Recently purchase a second one after I discovered mice had turned my car into meal after a deep snow. Warm place to nest. And, look! Lunch! Caused damage to electrical and the vacuum lines.

    Shipping is quick. Product appears to work as advertised. I still have a truck and car.

    Thanks, Matt!

  6. JamesL

    5.0 out of 5 starsThis is my second mouse blocker. I had a …
    ByJAMES H LACEYon May 19, 2016
    Verified Purchase
    This is my second mouse blocker. I had a lot of damage in my cars engine compartment and the hoses above the fuel tank 6 years ago. I installed the mouse blocker and have had no more signs of rodents or damage under the hood or anywhere in the car. I’m counting on this second one will serve me as well !

  7. AmazonCustomer

    5.0 out of 5 starsThese mouse Blockers work!
    ByAmazon Customeron May 7, 2016
    Live in the country. Had nests on the gas tanks and under the hoods of two vehicles. Installed two Mouse Blockers in my Ram and two in my wife’s Challenger. No more problems with rodents or squirrels. These things really work. And their customer support is absolute tops.

  8. Rated 5 out of 5

    christian lake

    My car is always parked outside where its surrounded by a forest of scrub oaks. The area is extremely distant from human civilization, but is an all year habitat for critters of all kinds. A friend’s car was parked next to mine for only a few days, and due to the mice, sustained THOUSANDS OF $$$ of damage to the engine. My car was UNtouched because I had installed a Mouse Blocker under the hood. This will be my 3rd winter with the Mouse Blocker, and I’ve waited all this time to write a review—because I wanted my words to reflect a truly reliable trial. It IS a fantastic product! I give it a 5+++++++++ rating.
    C. Lake, @ 6,500ft in New Mexico

  9. Rated 5 out of 5


    Excellent Product that has saved my new Dodge Ram. Just had to get it installed from the dealership for the proper installation.

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