Yes, I'm referring to the "plate" that is underneath the oil filter, engine, etc. I'm not sure the material, but it does not appear to be anything that is super strong, it just keeps the underside of the engine clean is all I can tell. My wife has a LR4, and she has a metal skid plate under hers. Very easy to remove, just loosen the bolts, and it falls right down. However on mine, it is wedged in between the engine and the axles, and is only connected by a couple of small screws. I'm sure it is there to offer some sort of protection, from small debris, and it appears to be keeping everything fairly clean. However I can't access anything from underneath with it in the way.