Submission + - Unlock your Mazda 3 trip computer in 6 steps
justAnotherGuyWithaCar writes: "According to these website instructions you can add free functionality to your car. "So you thought that little clock on your Mazda 3's dashboard was all it could be? Think again! My buddy was able to successfully unlock the full trip computer functionality to his base model Mazda 3 by following the basic instructions""