Very easy, once you get past the shock of seeing the entire underside of the car cloaked in plastic panels. The largest and rear-most access panel under the engine has to be removed. It's roughly 10" by 12". There are two 8 mm screws and two plastic push pins that secure it. Use a small screwdriver to pry the center pin down about 1/4", then the pin will pull right out. The drain plug and filter are right there. You will need an 8 mm allen tool to remove the plug as it has a recess in it. 5/16" will work too. Mine has a 3/8" drive. With just an allen wrench you'll need to be creative about extending your leverage. That's it!