Expertise on a 2001 Mitsu Montero?

Unfortunately, that is the price you have to pay for owning this SUV. It is a beautiful vehicle to drive but very expensive to fix. A mere relay for the four wheel drive system will cost you hundreds with labor of course. I was lucky enough that the troubles in my Montero happened when the truck was under warranty and it just squeezed through the warranty period too! I had an anti-freeze line replaced for the back seat cooling system that dented my account for 700 dollars. O2 sensors aren't that expensive, but since the dealership worked on it, you'd expect a pricier charge. Yes, there are 2 sensors. One before the catalytic converter and one after the converter. All these necessary for emission regulation. Mitsubishi, unfortunately is one car brand that not all mechanics could work on. The 3000GT is very infamous for this. Very few outside the dealership could fix this vehicle the right way. The Montero is the same way. I initially took my Montero to the local reputable shop in my area and they weren't able to take care of the problem. That was money wasted. Took the truck to the dealership and the truck was fixed like new! Things are not gonna be better as time goes on. The truck is getting old and sooner or later, something will fail. That will be another expense. Sorry, I feel you!