The handle of the Jetta key is composed of two covers against the buckle. You can pry it open with small tools such as blades and saw blades. It usually doesn't leave any damage marks. The chip is in the handle cover on one side, and there's nothing else in it, so it's easy to identify. Take this chip out and put it in your new folding key case, with the metal key teeth close together, so it can be used normally. Generally speaking, it is not as difficult as expected. You can do it yourself.