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Hi there, I have a 2007 Mazda Axela and it shakes whenever I brake (idle in drive). There is a small noise that sounds like its coming from under the hood somewhere when the car shakes too. When I put the car into neutral, it doesnt seem to shake. Any suggestions?
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I presume you mean that the engine is shuddering and idling unevenly when the car is stationary and in drive.
There are a few possibilities that could cause uneven idling - perhaps a faulty coil, an air leak or a misfire of some sort.
Also, if the air-conditioning is on, the idle speed should increase. Sometimes a faulty idle-increase signal can cause the engine to idle slower than it should, which could also cause the symptom you refer to. If this is the case, try turning the a/c off and see if there is any change.
All things considered, I suggest you have a mechanic look at this problem.