Just wanted to share a problem I had with my mazda 3 I sport 6 speed and the remedy. Problem, enter car, depress clutch, security key green, press start button and nothing. If any forum members have this issue, we'll this is what I found wrong. I went to the black relay box under the hood, removed the cover and started to press all the relays down, all were tight, then I pressed down on the plug in harness that is plugged into this box and the connector moved down about an 1/8 inch snd then snapped in, I was so confident this was the issue that I closed the hood wentry into the car and bam, it's been starting everytime now for over a month. The problem was happening to me with greater frequency and on that day, it wasn't starting at all after I shut down, so if you have this issue, check that harness connector in the relay box under the hood and make sure it is completely seated and snapped in.