Question about 2002 Mitsubishi Montero Sport

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Have had 6 alternators in 4months go bad 3 different garages cant find the problem? every time its good for a month and then light come on the dash and then the car dies and the alternator gets tested and its bad every time?

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  • Jonathon Subia
    Jonathon Subia Dec 30, 2012

    Joan, it was the starter. Plus putting the 140 voltage alternator has completely fixed the problem. I also heard that with these alternators on the Mitsubishi montero sport, that it has to be original manifactured. The starter was draining the alternator and had been for a couple of years. Mechanics are like doctors the dont necessarily know the problem so they keep diagnosing. Get high volt alt. a good one, not cheap and check that starter.

  • booboofresh8
    booboofresh8 Jan 23, 2013

    having same problems, how did this turn out for you. is it worth dropping the money into or gettin rid of SUV. nothing else is wrong with the montero, just this. but it will def drive you nuts.

  • booboofresh8
    booboofresh8 Jan 23, 2013

    having same issues. did this last action work or should i get rid of this thing first chance i get. nothing else wrong with it just this altenator problem.

  • Charlie M Valle
    Charlie M Valle Jun 29, 2017

    I had the same issue and one mechanic told me had an oil leak in the manifold gasket, therefore we bought an alternator with a cover that resolves the issue and no problems since.

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Alternators shorting out on 1998 to 2004 models is very common. These alternators are located below the power steering pump and it is very common for the pump to leak externally and then contaminate the alternator to the point that the electronics fail.

Before installation of your new or reman alternator, check all surrounding areas for leaks.

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Posted on Dec 03, 2015

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I am having the same type problem with my 2000 Montero Sport ES. I have replaced the alternator four times and the battery twice. I Google the symptoms and find you guys describing the same type problem. Obviously, something is shorting the alternator out to the point of destruction. Is the age of the vehicle becoming a huge strain on this alternator design? If so, could there be another alternator design available that can sustain despite the age problem? Is there some sorts accompanying voltage regulator replacement that could fix this issue. Anything?

Posted on Aug 19, 2014

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I posted under jonathon75. I got a higher voltage battery 140 or 160 and it has been working fine since march 21rst but this last month it seems to be getting bad again. It has been starting but slowly and especially if I leave the ac on it era drained. It hasn't left me stranded yet. And the oil leak problem is ****! It doesn't have anything to do with the problem we are having. I had the valve gaskets replaced and the issue remains. Something is pulling the voltage down. I've read maybe the voltage regulator? Funny I was looking for solutions and just and across my old comment. Wish it could be updated. This is crazy and very taxing.

Posted on Aug 17, 2012

  • Joan Faux Dec 30, 2012

    did you ever figure out what the problem was?

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Could be an oil leak that's causing the alternator to go out. I had my alternator replaced and had my cam bore seals replaced, but the alternator just went out only after having it for 1 month. Going to have it replaced again tomorrow. It could be that the oil was leaking on the new one before I got the oil problem fixed. Before the brake and battery light came on, my service engine soon light came on and I took it to the dealer and they told me it was my 02 sensor so I had that replaced. A week ago my service engine soon light came on again. I checked my gas cap and made sure it was tightened and the light went off after I cranked it up again. I replaced the battery after the alternator went bad the first time because the battery died after 2 weeks. I don't have any solutions to this problem but it is very frustrating. I bought this SUV brand new in 2002 and have not had any problems in 9 years, until this situation. I had the timing belt changed at my 60,000 interval, fuel injections cleaned, I even had the transmission power flush at the dealear suggestion. Car drives great always has, but I don't want to keep having to have a new alternator and battery every 1-2 months. If anyone knows the problem and a way to fix it please post.

Posted on Apr 10, 2011

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  • rmacon Aug 29, 2011

    I have had very similar problems with my 02 Montero. I have also been told on 1 occasion that an oil leak was fouling out my alternator, but on the last 2 change outs, my mechanic noted that the alternator did not show signs of oil fouling out the alternator. My problem started last November & I have replace 5 alternators. Most of the time, the new alternators only lasted 1 month, but the 4th alternator lasted approx. 3 1/2 months. If someone has a answer, I would love to here about it. Currently my vehicle is located in Natchez, Ms. with a shade tree mechanic trying to determine if there is a short in the system causing the voltage to increase & causing this problem.

  • rmacon Sep 12, 2011

    My mechanic found several corroded & frayed ground wire connections that needed to be cleaned or repaired. I'm not sure if the problems is fixed, because mine does the same thing - it runs well for about a month and then goes out. I've had the electrical system checked in the shop, but they have not found anything with the system. My recent mechanic told me that most shops do not do a thorough job of searching for these type of shorts. So far, it's been about 2 weeks, but it is a reasonable tactic to take. He also mentioned another possible problem with the light in the dash that illuminates the gauges, but suggested to hold on this because it was a more extensive repair.

  • Rebecca Hurteau Jul 07, 2012

    Having the exact same problem with alternator in my son's 02 Mitsubishi Monterro Sport. Replaced alternator last September (never had any problems with the vehicle before that). That alternator went out in May, replaced under warranty, 2 weeks later, it goes out again. Again was replaced and wiring was checked and a few wires replaced...that lasted one month. The alternator just went out again last week. Now the shop is saying that OReilly's will not warranty replace the alternator anymore and the vehicle needs to be taken to a Mitsu. dealership to find out what is going on. No oil leak and vehicle runs perfectly fine until the alternator just crashes out for some reason. Very frustrating. Battery has been tested but going to buy a new battery this time and see if that helps anything. Probably about to trade of the vehicle because of all the frustration with the alternator issues. :(

  • Rebecca Hurteau Jul 07, 2012

    Having the exact same problem with alternator in my son's 02 Mitsubishi Monterro Sport. Replaced alternator last September (never had any problems with the vehicle before that). That alternator went out in May, replaced under warranty, 2 weeks later, it goes out again. Again was replaced and wiring was checked and a few wires replaced...that lasted one month. The alternator just went out again last week. Now the shop is saying that OReilly's will not warranty replace the alternator anymore and the vehicle needs to be taken to a Mitsu. dealership to find out what is going on. No oil leak and vehicle runs perfectly fine until the alternator just crashes out for some reason. Very frustrating. Battery has been tested but going to buy a new battery this time and see if that helps anything. Probably about to trade of the vehicle because of all the frustration with the alternator issues. :(

  • Joan Faux Dec 30, 2012

    I am having the same problems been through 3 alternators and 2 batteries....Doesn't anybody have an idea as to what could be causing this?

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