HONDA. Plastic used for wiringinsulation in HONDAcars is made from soy, thus attracting rodents. HONDAhas an official response on how to deal with rodentsbecause it is an established problem. Service bulletins exist for the Odyssey and Accord models dealing with rodentdamage to the knock sensor wiringharness. Incredible Edible Car - SynLube Is this answer helpful?Thanks!Give more feedbackThanks!How can it be improved?How can the answer be improved?Tell us how Honda's Soy-Based Wiring Covers Irresistible to Rodents Jan 26, 2016Environmentally friendly car wiring with a soy-based coating is too tempting for rodents to resist, according to a federal class-action lawsuit that demands Honda pick up Author: Lucy Bayly 2018 Honda Civic Soy Based Wires Chewed By Rodents: 2 The 2018 Honda Civic has 2 problems reported for soy based wires chewed by rodents. Average repair cost is $1,500 at 400 miles.