These instructions apply to the Mitsubishi Outlander Mk2 (CW) 2006-2012.
For other models, please choose your vehicle here.
Short answer: to disconnect the 12V battery on the Mitsubishi Outlander CW (2006–2012) safely, switch everything off, then undo the negative (−) terminal first. On reconnecting, fit the positive (+) first and the negative last, switch the ignition on and pause before starting so the electronics settle.
Before You Disconnect
The 12V battery is under the bonnet. Never undo the terminals with the engine running. Disconnecting the battery clears the clock and radio presets, and you may need to re-set the driver’s window one-touch afterwards. If you have KOS keyless start, keep the fob to hand.
Disconnect the Battery
- Switch the ignition off, remove the key/fob and close the doors; wait a short while for the systems to power down.
- Undo the negative (−) terminal first.
- Undo the positive (+) only if you need to remove the battery.
Reconnect the Battery
- Fit the positive (+) first, then the negative (−); make sure both clamps are clean and tight.
- Switch the ignition on and wait a moment before starting, so the electronic systems re-initialise.
- Reset the clock, and if the driver’s window has lost one-touch, run it fully down then fully up and hold at the top to re-learn it.
If a warning stays on after this, have it read by a specialist.
Frequently Asked Questions
Which battery terminal do I remove first on the Outlander?
The negative (−) first. On reconnection, fit the positive (+) first and the negative last.
What needs resetting after disconnecting the battery?
The clock and radio presets, and the driver’s window one-touch may need re-learning. The key fob does not need re-coding.
Will my keyless start still work after disconnecting?
Yes — keyless operation is not lost by disconnecting the 12V battery. If the fob itself is flat, see our dead-fob start guide.
How do I re-set the window one-touch?
Run the driver’s window fully down, then fully up, and hold the switch up for a second or two once it’s closed so it re-learns the top of travel.
If a warning light remained on after reconnecting, look it up on our sister site autodtcs.com to see whether it points to a fault.
Independent guide — not affiliated with Mitsubishi. Always follow your official service manual and safety precautions. Read our full disclaimer.