I have a 05 Saab which the field mice think is their dining room. They are eating the insulation in my engine. The next step is my wiring.
Where do you park? If in a garage, put traps in the garage. If not, put them under the hood and take them out when you drive.
If you park in the garage, do you keep stuff in there that attracts mice, bird seed for example?
http://www.gemplers.com/product/G73500/Rotating-Head-Owl
You might try one of these. The people I know that use one say it’s very effective.
Tester
You could contact your state’s Department of Agriculture office. They’re experts in rhodent control. And they work for free!