Reader Question: Gnawing Protection?

Print Friendly, PDF & Email

Here’s the latest reader question, along with my reply!

Greg asks: What an I use on a wiring harness on newer vehicles to discourage rodents from gnawing on the wires? My 2018 Camry had a systems meltdown this morning which turned out to be due to chewed wires running to the fuel injectors. The dealer didn’t even discuss a splice option since I assume the signals are more than simple on-off these days. I already dislike the car so I’m going to get it repaired and get rid of it, but, i the mean time, I don’t want to be out another $600 for a wiring harness since  the vehicle is outside a couple of nights a week.

My reply: This is a fairly common problem and apparently becoming more so because “environmentally friendly bioplastic” materials are being used for wiring insulation now – and (apparently) rodents find this stuff tasty.

I’ve spoken with several people I respect about this and the one that seems easiest is to get a plastic spray bottle and fill it with a mix of something that isn’t tasty, such as a Pine Sol/Clorox brine (a third bleach or Pine Sol, two-thirds water) being careful not to spray it onto connectors/components; stick to the exposed wires/area around the exposed wires. Capsaicin/pepper-sauce-laced tape, wrapped around the vulnerable areas is another option.

Set rat traps/bait in the area near where they car is parked.

I’d also recommend parking the car in a different place, if possible. The rodents you’re dealing with may be near where you currently park.

. . .

Got a question about cars, Libertarian politics – or anything else? Click on the “ask Eric” link and send ’em in!

If you like what you’ve found here please consider supporting EPautos. 

We depend on you to keep the wheels turning! 

Our donate button is here.

 If you prefer not to use PayPal, our mailing address is:

721 Hummingbird Lane SE
Copper Hill, VA 24079

PS: Get an EPautos magnet or sticker or coaster in return for a $20 or more one-time donation or a $10 or more monthly recurring donation. (Please be sure to tell us you want a sticker – and also, provide an address, so we know where to mail the thing!)

My latest eBook is also available for your favorite price – free! Click here.  If that fails, email me at and I will send you a copy directly!


Share Button


  1. My neighbors and I experience this a lot and we raise the hoods all the way up. You may have to unplug a light but it beats broken wires. When you get home just raise the hood as if there’s no other way to live. Seems to work fine.


Please enter your comment!
Please enter your name here