I bought aftermarket splash guards, so the mounting procedures might be a little different, but not much. It is MUCH easier to put on the rear splash guards if you remove the rear tires. I drilled pilot holes for the screws, as needed. You need to have the tires off to do that. Plus, it’s so much easier to run the screws in with a regular Philips screw driver than the little angled one supplied with the splash guards. Once I got the tires off, the rear splash guards only took about 10 min each to put on. They are so easy, anyone can do it.
On the front splash guards, you don’t have to remove the tires. Just turn the tires one way or the other to get them out of the way. There is plenty of room to get a drill and Philips screwdriver in there. One word of caution on the front splash guards, if drilling pilot holes through the plastic wheel well trim/liners, DO NOT drill a hole for the top mounting screw, as it will go into sheet metal behind the plastic. If you drill into the metal, rust will set in where you cannot see it until it’s too late. The top mounting screw was completely unnecessary on my splash guards. There is a bottom mounting on the front splash guards needs a bolt. I used plastic bolts so they would not rust. They are tricky to get in, as you have to lay on your back and pry some of the plastic wheel well trim away to gain access to put the nut on the bolt. It’s not brain surgery, just a little difficult and awkward to get to.
Here are pictures of mine, back and front. Notice the last picture of the front guard without using a mounting screw in the top hole to avoid drilling into sheet metal behind it.