BSO

If you live in a wooded/rural area, critters love to get into your car. I had one use a/c insulation in the engine compartment as nest material.

Tough to keep them away other than garage and even then they will get in. Hate to use control but you could be looking at expensive repair otherwise.

B Russ

Dont waste your $$ in ultrasonic devices. There is zero clinical evidence of their effectiveness. in-fact if you look on the tube you can see trails where they didnt work at all.

tgavem

Problem is that auto manufacturers use a peanut, palm, or vegetable oil as an additive in the polymer extruded over copper to reduce hydrocarbon use. Rodents smell and love it.
if you drive daily, rodents are less likely to get into your car.

Porsche_nuts

Re-tape you wiring harness with this

https://www.ebay.com/itm/Anti-Rodent...YAAOSw2cRcfzZP

fast1

I live in the country in northern MD. When it starts to get cold in December, field mice seek a warmer shelter and they aren't choosy. A car that is nice and warm from being driven during the day makes a nice abode.
About 30 years ago I noticed a burning smell coming from the front of my car, and when I checked I found a little home that mice were building in my engine compartment. After cleaning out the mess, I first tried to seal off the tiniest access points in my garage. That was a waste of time since I discovered that mice can squeeze their bodies through the tiniest of holes. So I then put a pack of dcon pellets in a corner of my garage near the garage door. All the pellets were eaten within a couple of weeks. I then replaced it with another dcon pack, and it went untouched. So every December I put a pack of dcon in my garage, and I haven't had another mice problem. It's a simple and inexpensive solution. My only caveat is its use when there are young children or pets in the house. Dcon is a poison. So either precautions must be taken to protect children and pets or another solution must be found.

B Russ

These unsecured or improperly placed "pellets" are the reason so many pets are poisoned. Please be careful with your placement of rodenticides

Carlo_Carrera

I live a heavily wooded area(a forest) and my cat kills 30+ mice yearly, I have a few collector cars stored in my garage and never had a rodent problem in 20+ years...

DaveGee

But you have to have a cat, right?

I’ll take the cautious rodenticide route.

DaveGee