I used to have to check mine every day before I started my car. Open the hood, there was a rabbit, sitting most times with it's head in the drivebelt area. Every morning for months. Lucky thing I'd look, otherwise woulda been a lot of dead rabbits under my hood. Took off my splash guard, no more rabbits. Not one. If you live in an area with lots of loose animals, remove it.JAMESZ said:Every Z31 that I have seen (that isn't in the best condition) that doesn't have splash gaurds has horrible rust in that area. If you don't DD the car and if it is garaged kept I would say it is fine, but if they salt your roads alot, it is wet in your area, and the roads aren't particularly good (like where you live in Washington) I would say they are a must.