How to Fix a Misfunctioning Mitsubishi Key Fob Modern Mitsubishi vehicles are equipped with the latest immobiliser technologies that permit them to use keys that can be remotely accessed to provide security and a convenience measure. If you lose your Mitsubishi keys, you might need to call a locksmith. This is due to the fact that they are difficult to cut with the key cutter. To replace a battery in your Mitsubishi key fob, remove it from your car and find the slot at the top of the key fob. Install the new battery after carefully separating the two halves with a small screwdriver. Keyless entry system mitsubishi key (look what i found) fobs are a safe and convenient way to unlock your car and gain access to its interior. They can be used to unlock doors or start your engine and even remotely shut and open your power liftgate. However, sometimes your genuine mitsubishi key replacement key fob can fail or cease to respond to your commands.