Just got my 911 back. In the shop since December while waiting on a wiring harness destroyed by a rat. $30,000 repair bill, luckily paid by comprehensive insurance. Engine is in the back and down low on the 911 so, besides rodent proofing my garage as much as possible, I keep a cardboard piece soaked with peppermint spray under the engine and also have a bright LED light shining on the engine at night. I have a motion detection camera too, just to catch any determined rodent in the act. Now my 4Runner is parked in the driveway so I spray the peppermint spray all over the engine. I have traps all over the garage too. I think I am OK in the garage now. The 911 wiring damage is the only damage like that I have had in 28 years at this house. No doubt related to the soy based insulation. I think the problem was compounded by having dog food stored in the garage near the 911, and there was a way for a rat to get into the garage. Now no more dog food in the garage and I sealed off the stealth rat entrance. Once a rodent damages your vehicle you get a little obsessed with trying to make sure it never happens again!