Some models may have a problem with stalling under light acceleration. Updated software for the powertrain control module (PCM) is available which may help with this concern.Google+
Car Problem Reports
Mazda Mazda6 Updating PCM Software Will Help Problem With Stalling Under Light Acceleration
Mazda Mazda6 Problem
Engines Affected: 2.3L 4 Cylinder, 3.0L V6
Average Mileage: 97,384 mi (55,800 mi - 166,121 mi)
My car stalled as I was approaching a stoplight at about 10 mph. I had just started to accelerate through the light when my dashboard lights came on, the engine stalled, and my power steering and brakes went out. The car started right up again. I went to a Mazda dealership in Ft. Wayne, IN, who could find nothing wrong when scanning the computer. I drove to Michigan and back to Ohio, with no more occurrences. I had the car checked again by my Mazda dealership in Beavercreek, OH. They couldn't find a problem, either. This has just happened the one time, so far. I will update this after checking out this update.
Visitor, 2004 Mazda Mazda6, 2.3L 4 Cylinder, 166,121 mi
When accelerating the takeoff is horrible even with changing lanes the stall almost caused an accident
Visitor, 2006 Mazda Mazda6, 2.3L 4 Cylinder, 58,000 mi
Sometimes when I want to go and hit the gas it takes a minute to kick in; then I take off alot faster than I intended to.
Upon acceleration the car would hesitate. I took it to get fixed and they stated it was ignition coil and needed a tune up. It did seem to fix the problem, however they also mentioned that it came back with a code to replace the knock sensor.
Not all the time but getting more intense with the summer heat that when we stop at a light the car will try to stall and start shaking, I have to rev the engine to get it to stop doing it