Be careful using a 12 pnt socket on that stupid piece of plastic. A 6 pnt 3/8 socket is best and will never chew up a corner of one of the flats on the hex nut of the cover. There are several sockets made just for this purpose.
Anybody remember the first edition of the Infinit Q45, there was an under engine panel that started at the grill and went back as far as the fender and door seams. Many 6mm bolt that screwed into nuts welded to brackets or into the frame of the car. After a long winter up here in the northeast, many of the bolts would snap off when trying to remove them. The cover was required since there was no grill opening, it ducted the air allowing the cooling system to work. No panel, the car would overheat.
Several difficult to access oil filters on Nissans too. The first 300ZX was a nightmare, from above, unseen, beneath the right side exhaust manifold that was burning your forearm. How about the 4 cyl. pickups, where nearly the only way was to lift the truck and go thru the wheel well above the tire. Be careful not to hit thr battery terminal on the alternator that is clocked just in the right position. Our the vehicle my wife had two of, the Sentra with the 2.0 liter motor. The filter was on an adapter located behind the cylinder head on the right side of the engine. No access from beneath, and from above, hardly even then.
