You need the remote keyless entry device. If you don't have one you will probably have to order one from Mitsubishi. This is what they look like (below) although I don't know if it would work for your vehicle if you buy one online, they probably need to be programmed for your VIN number.
To disable the alarm on the Mitsubishi Montero sport without the alarm key you have to open the door. Otherwise it is not possible.
How do you replace the computer on a 2000 montero sport
The Mitsubishi Montero is available to test drive at the Mitsubishi dealer. Call your local Mitsubishi dealer to take an appointment in order to test drive the Montero.
how to set the timing marks on a 1995 Mitsubishi Montero
how to replace the alternator belt of a mitsubishi montero 2000 ?
who do you set a timing on a 2001 Mitsubishi montero
The Montero was made by Mitsubishi
you pop the hood and behind the battery slighty to the left you find a small red cable, carefully pull it off and bam!
How do u take out the radio on a 1999 mitsubishi montero sport ls
Distributorship of 1994 Montero can be located in most Mitsubishi car dealers worldwide. Montero is a popular sport utility vehicle of Mitsubishi.
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diagram of mitsubishi montero dash