how to replace the headlight
Take a hammer. smash the headlight assy. lens. Remove old bulb, put in new.
If you're talking about the headlight, the "lens cover" is not a separate part, you need to replace the whole headlight assembly.
I assume you mean HEADLIGHT LENS.. .. there are 3 bolts on the back, remove, pull out headlight. Remove clips and broken lens. Replace gasket, lens and put on clips FRONT TO BACK so you don't chip the lens. Reinstall with 3 bolts on back.
I think the lens cover has snaps along the top and sides of the lens cover. It also looks as if you would have to loosen the turn signal unit that sits beside each headlight. The headlight lens cover is tucked into a recess along the turn signal unit. It doesn't look as if you would need any tools to remove the old lens covers, but you may need a screwdriver to loosen or remove the turn signal unit next to the lens.
you need to remove the bumper to access the 2 10mm bolts of the headlight
There aren't headlight covers, it all one unit. One of my lens was cracked and I had to replace the whole unit.
Where the lens meets the housing there is a seal, just replace it.
You don't. Instead, you replace the entire assembly.
You must replace entire assembly. If your problem is just foggy lenses, you can get lens cleaning solution at auto parts store.
The lens itself is part of the composite headlight assembly. It all has to be replaced as a unit.
If a plastic lens, drill a very small hole at the bottom to let water drain out. If a glass lens, you will have to replace.