This was an interesting question as I was not aware of it. I have tried to contact the dealer who sold me the car who had no idea about it, and asked me to contact Mazda directly. I have sent Mazda an email on 1st Jan 2022, and is still waiting to hear back from them. I will update this once I get a reply.

Thank you! I also emailed Mazda and the reply was a "best guess" as the person did not work in the actual parts department, but to his knowledge Mazda uses only plastic not soy coatings on wires. I did ask a follow up to let me know if he got more accurate information. Funny thing was that person at Mazda had purchased a Honda that had soy and it cost him $2200 bucks in repairs from rodent damage. My mom's Honda..over $1200. To me this soy issue is as big as the takata airbag issue and it is industry wide. So far, the auto manufacturers have avoided taking responsibility inspite of numerous class action suits.

Yes, Agree. This could be the tip of the ice-berg.
In 2016, a class-action lawsuit was filed against Toyota claiming the company should cover this type of damage after a customer was forced to pay around $1,500 to fix the chewed wiring under warranty.

I also own a Mazda 2 2007. MAXX nothing but troubles, rattles rough idle at lights too.
Paid for 3 bloody engine mounts, sensor, air filter, had to dealer so sick of it now. Seems to be on a real low ratio when starting up to 40 after that it's ok in higher gears. Auto. Had engine cleans, starting to think it is a lemon.
Very disappointed.......any suggestions?

it is dirty fuel injectors which can be cleaned

Spark plugs? Engine mount, are you RPM low? Drivebelt,DriveShalf,CV's

Ide might need adjusting

1.5 L for NZ roads country roads at least