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Yes, you can jump-start a Toyota Highlander like any other regular vehicle. All you need to do is connect the positive and negative terminals of your Highlander to any external source, and you are good to go. Do keep a set of jumper cables with you, as they might come in handy in cases like these. You can easily buy them from any store like Walmart. If you need to jump-start your car often, then it might be time to consider a battery replacement. The average cost of battery replacement for your highlander lies in the range of $75 to $200. Many places offer free battery installation, like at Autozone.