Get yourself a pair of these to prevent future damage.
Under Hood Rodent Repeller Battery Operated
You can also spray mint oil in the engine compartment once a month to keep them away.
My wife's RAV4 had $700 damage to the harness from rodents.
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"I hope yours took a bath once in a while, kid. This guy's armor smells like he lived in it."
―Han Solo to Luke Skywalker, while donning TK-422's armor.