I had the same problem once and saved alot of money by doing it myself. You could remove the entire (or part) of the fender cover (under the fender) until you get access to the light housing. All you will need to do is unscrew the light and pull it out. The hardest part was getting access.
In the front
The number one cylinder on a 95 Mitsubishi Montero is in the front of the engine. It is on the left side as you face it.
You can find the PCV valve for your 1997 Mitsubishi Montero on top of the engine. The PCV valve will be in front of the air cleaner housing.
On a Mitsubishi Montero Sport, the front bottle, or tank, for the windshield washer fluid is right behind the passenger headlight in the engine. It is just inside the passenger front bumper.
If it's anything like my 01 montero 4x4, its not fun. you have to remove the wheel bearing, and repack it. takes time and patience. your better off taking it to a garage for this one.
We went to auto zone and they gave us a free manual on how to do it. It's pretty easy if you take off the front passanger tire.
how do i replace a front crankshaft seal on a 99 mitsubishi mirage
I took a few screws out of the front wheel well mud guard behind the marker light and reached in through there to remove and replace the side marker light.
You have to take off the fender well.
On the front of the engine. It keeps the belt tight.
how to replace front shock absorber on Mitsubishi 1997 TE Sedan
3 in a little black box in front of the battery.