In this guide, we will show you how to change out the battery on a 2019 Mitsubishi Outlander. Anyone can do this and it doesn't take long. We will also show how to clean the battery terminals and connectors to prevent and kill corrosion.
What You Will Need
- 10mm wrench
- Flathead screwdriver
- Battery terminal cleaner
- Battery Carrier (optional)
- Battery corrosion Inhibitor (optional)
- If your car will not unlock, remove the emergency metal key form the keyfob and use it to unlock the driver's door.
- Pull the hood release under the dashboard (driver's side) and open the hood.
- Pry the plastic retainer clips up that is holding the air intake down with a flathead screwdriver or trim tool, pull the clips out of the holes.
- Push the air intake up and away to pop it off the airbox that houses the air filter.
- Use a 10mm wrench to loosen the nut on the negative terminal connector. Remove the negative cable.
- Then, use the wrench to loosen the nut on the positive terminal connector and remove the positive cable.
- Loosen the nuts on the battery hold down with the 10mm wrench. Loosen them until the hold-down can be unhooked from the holes on the battery tray. Remove the hold-down.
- Push the cables out of the way and use a battery carrier to easily remove the battery from the vehicle or get someone to help. Be careful lifting the battery out, they are heavy, get an extra hand to help if necessary.
- Take your battery terminal cleaner and pop the top of it off to use the straight wire brush. Take the wire brush and work it inside the terminal connectors. Clean any corrosion or oxidation from them.
- Put the top back on the terminal cleaner. Use the round part inside the bottom of the terminal cleaner to brush the battery terminals. Work the round wire brush over the terminals until any corrosion is gone.
- Use a battery corrosion inhibitor spray on the terminals and connectors. Make generous coats to prevent any future corrosion.
- Place the new battery back inside the vehicle with the battery carrier. Use proper lifting procedures and be sure not to pinch your hands or fingers between the battery and the vehicle.
- Reinstall the battery hold down. Place the J-hooks through the holes of the battery tray and tighten the nuts on the hold-down to hold the battery snug.
- Install battery cables on terminals in the reverse order, positive first, negative last. Make sure the connections are snug but do not overtighten. Check to make sure the vehicle starts, you are all done!
These instructions apply to other Mitsubishi Outlander years including 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2020.
My car won't start, how do I know if the battery is bad?
Do a visual check to see the condition of your battery under the hood. Always make sure there is no liquid or corrosion built up on the battery top or around the terminals. Check the age of the battery by the dated sticker on the battery top. Batteries usually last around 3-7 years depending on the type and quality.
Turn the ignition to see if any lights come on, on the dash, turn the headlights or dome lights on to see if there is power. If the lights are dim the battery is low.
Use a voltmeter to check the voltage of the battery. A fully charged battery should be at 12.6 volts, anything lower and the battery should be charged. If the battery is charged and still not working, have it tested on a battery load tester. This test will let you know whether the battery is good or bad.
What is all of the stuff around my battery?
A build-up of corrosion is common on batteries if proper charging system maintenance is not maintained. If there is a lot of corrosion it can cause a bad connection to the terminals of your battery.
Use baking soda to neutralize the acid of the corrosion. Use an industrial-strength battery corrosion cleaner to get rid of the corrosion and an inhibitor to prevent further corrosion. It is a good idea to install new terminal connectors because corrosion greatly weakens the metal over time. Clean all of the corrosion and reinstall the terminals snug.