Pull the hood release under the dashboard to open the hood.
Remove the engine air inlet pipe on top of the battery. First, you need to remove two small plastic retainers.
Disconnect the negative battery terminal. First, loosen the 10mm nut, then pull up on the cable.
Remove the red plastic cover from the top of the battery. Loosen the 10mm nut on the positive battery terminal. Disconnect the positive terminal.
Loosen the 10mm nut on the top bracket. Then pull the bracket bolt down and away from the battery.
Remove the battery from the battery tray. Place the new battery in the car.
Install the top bracket. Don't over-tighten the bracket bolts, or you risk cracking the battery case.
Clean battery posts and terminals with a battery wire brush.
Connect the positive battery terminal first. Ensure the cable doesn't move.
Connect the negative battery last.
Spray battery protector on the battery posts.
Connect the engine air intake hose.
You just replaced the battery on a Mitsubishi Lancer.
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Mitsubishi Lancer Replacement Guide DIY This article provides instructions on how to change the battery on a Mitsubishi Lancer. Replacing the battery on a Mitsubishi Lancer is very easy and can be completed in less than thirty minutes.