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The engine in this vehicle does have a "known problem" with the spark plugs having a tendency to break during removal. If the plugs were changed once before, and the correct method was used to install the new spark plugs, the risk should be greatly reduced this time around. The "trick" here is to back the spark plug out a few turns, and then turn it back in a couple. Then out a few more, then back in. As long as you use this "working" motion, you should have no problems. To gain access to the plugs, the ignition coils will first need to be removed. The plugs are below. I've wrapped up the procedure into a PDF file for easier viewing/printing. Download the PDF file here: https://goo.gl/zKf8DW
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