2006 Mazda 3 gear and drive indicator lights flickering intermittently and sometimes going off completely and car running rough... no warning lights and computers show no codes

SOURCE: the open door warning light indicator does not go off .

There is a problem with the door switch the door is not pushing the switch in completely. Here is what you do close all the doors, then you open them one at a time with all the other still closed. start with the drivers door. open and look for the pin with that the door touches when you close its on the bottom close to the back of the driver's seat it has a black rubber covering it. Press with your thumb in and see if light goes out. Check all other doors in the same way you will see which door switch is not being pressed in completely when door closes. If you find it a quick fix is to pad the area on the door that makes contact with the switch to push it in, for example you can use one of those round sticky cushions that you use on the metal chair legs to prevent them from scratching your wood floor. However if you can solve the problem in this way you may have to take it to electrical mechanic or I will be able to provide more help. contact me and leave me a feedback. Good LUCK

SOURCE: dash lights go off intermittently

I'm no expert, I recently purchased a 2003 vibe. I noticed the automatic headlight's sensors can be super-sensitive, about an hour hours before dusk they'll kick my headlights on (when the sun is still shining!), or sometimes when I go into an underpass, and then sometimes they'll realize it's light enough and turn themselves off. This would cause your dash lights to go to the 'headlights on' mode and turn the headlamp signal on, the intensity is controlled by the dimmer/dome light control on the left side of the dash. Check to see if the dimmer is down too far, as this could cause the lights to dim when the automatic headlights turn on. It's also possible that the dimmer is not working, thus no power is getting to the dash lights through the dimmer. Try testing it by starting the car in daylight, then manually turn on the headlights, then adjust the dimmer. Like I say, I'm no expert, just guessing because I've noticed it happen similarly on my Vibe, but my dimmer was at half-way, as I like it for night driving. Someday, I'd like to disable the automatic sensors and DRL.

SOURCE: 2001 BMW 325i problem: Car runs very rough, but no warning lights

Sounds like a fuel problem , have you changed the fuel filter in a while ? could be the knock sensor or the knock sensor module needs to be replaced.

SOURCE: 2006 Altima service engine light on, code 725

Check the SPARK plug condition, and AIR gap.
Regards,DT

SOURCE: 2005 Mazda 3 idles rough at stop light and sometimes dies

The problem is a faulty solenoid in the vapor recovery system. The solenoid is sticking open and allowing fumes from expansion of fuel in the fuel tank to enter the air intake and smother the engine. This is how the Mazda service tech explained it to me. It is a known problem on the Mazda 3 in various trims which Mazda refuses to acknowledge. Usually the check engine light comes on and the engine diag code reads mass airflow sensor, which is incorrect. I dealt with this for 6 months on my wife's 2005 Mazda 3i before the dealership figured it out. My cousin bought a 2007 Mazda Speed 3 which developed the same problem after a few months and was cured by the same fix.