Using MouseBlocker Electronic Pest Control In A Hybrid Vehicle - Prius

Question

Question:

I’ve heard hybrids are mouse magnets because of all the wiring. Would the MouseBlocker Classic MB44FR work in a 2022 Toyota Prius? I've had mice get into the engine bay of my truck, and I certainly don't want them in the expensive hybrid setup of the prius!

asked by: Dave

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Expert Reply:

Dave, you’re right - hybrids and EVs can be prime targets because of their quiet engine bays. The Classic # MB44FR is a great choice for a Prius; it wires directly to the 12V system. And yes, even hybrids have a 12V auxiliary battery. If you want extra deterrence, the Pro # MB94FR adds flashing LEDs, although this one draws slightly more power so I'd recommend keeping the car on a maintainer or solar charger for this one.

Do you typically store the Prius for long stretches, or is it a daily driver?

expert reply by: Andrew N

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Patty S.

12/31/2025

Hi Andrew! I appreciate the info about using this on a Prius. I have an older 2008 model and my mechanic just found a dead mouse in my cabin filter. He suggested a product such as yours to repel them. I don’t drive much more than about once a week and my car is parked outside in a semi-rural area of Portland, OR. Will the Classic model MB44FR work for my purposes?

Andrew N.

12/31/2025

@PattyS Hey Patty! That's never fun, but it does happen from time to time unfortunately. I would definitely go with the MouseBlocker # MB44FR for your Prius. It doesn't pull much power at all so it can stay attached to your 12 volt battery long-term without any issues. Now with that being said, my research says your 12v battery is likely in the trunk! That means you can install this there, but it won't technically deter mice from the engine bay area since those are completely different compartments. The MouseBlocker cannot penetrate throughout the entire vehicle. You should have a fuse box under the hood with fuses and relays. You can use what is called a fusetap (found at auto parts store or online). Just google a fusetap and find the one that fits your fuses, and you can wire the MouseBlocker to that inside the fuse box under your hood. Sorry I didn't mention this in the original write up; I didn't realize the 12v battery was in the trunk when I wrote that.

John H.

6/16/2026

@PattyS My 2014 Prius has a history of rats under the hood. I have also found rat droppings in the in cabin air filter, in fact, I once found two (freshly) dead BABY RATS in the in cabin air filter. When I was having the engine replaced in this Prius, while the engine was out, I attached with screws some 3/8 inch opening metal wire mesh over the air inlet for the A/C. WHY DOES TOYOTA HAVE NOTHING TO PREVENT RODENTS FROM CLIMBING IN THERE??? I bought a 12v ultrasonic rodent repeller for the Prius, it seemed to be doing the job for our CRV, but since the Prius 12V battery is in a compartment in the trunk. I guess I would have to run wires from that battery, under the car to the engine compartment to power a device under the hood. The maker of my repeller advises against that. The alternative seems to be repellers that take AA batteries, but I would have to change batteries every two months or so. I've tried all the VooDoo stuff... dryer sheets and pepermint oil and rat spray stuff, etc... even tried ALL these things together, but the rats just partied on regardless. I will not use poison, because I do not want to kill the raptors in our area. I have put rat traps under my car, and found rats are lless likely to invade my car when they are DEAD!!!

John H.

6/16/2026

My 2014 Prius has a history of rats under the hood. I have also found rat droppings in the in cabin air filter, in fact, I once found two (freshly) dead BABY RATS in the in cabin air filter. When I was having the engine replaced in this Prius, while the engine was out, I attached with screws some 1/2 inch opening metal wire mesh over the air inlet for the A/C. WHY DOES TOYOTA HAVE NOTHING TO PREVENT RODENTS FROM CLIMBING IN THERE??? I bought a 12v ultrasonic rodent repeller for the Prius, it seemed to be doing the job for our CRV, but since the Prius 12V battery is in a compartment in the trunk, I guess I would have to run wires from that battery, under the car to the engine compartment to power a device under the hood. The maker of my repeller advises against that. The alternative seems to be repellers that take AA batteries, but I would have to change batteries every two months or so. I've tried all the VooDoo stuff... dryer sheets and pepermint oil and rat spray stuff, etc... even tried ALL these things together, but the rats just partied on regardless. I will not use poison, because I do not want to kill the raptors in our area. I have put rat traps under my car, and found rats are less likely to invade my car when they are DEAD!!!

Andrew N.

6/17/2026

@JohnH Hey John, sorry to hear about your rat infestation! Maybe they just really like the quality build of Toyota haha. I'd look into using a fusetap like ATM Micro Dual Fuse Tap - 10 Amp Main - 5 Amp Added # 3375601007 or ATM Mini Dual Fuse Tap - 10 Amp Main - 5 Amp Added # 3375601000. This would allow you to basically tap off fuse that's already being used, and allow power to go to the MouseBlocker instead of running from the battery in the trunk. I've used this method before on another low power device when I was helping my brother with something in his car. It's really easy to do and requires no modification and won't hurt the fuse box or anything like that. Then you could wire in the # MB44FR. Only other thing I can think of is to use a plug-in household style like MouseBlocker PROx Plug In Electronic Rodent Deterrent - 110V AC # MB34FR which plugs into your garage and keeps pests out of the area all together. But this would really only be good if you have it stored in a garage.

Using MouseBlocker Electronic Pest Control In A Hybrid Vehicle - Prius

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