Car Shudders When Brakes Are Applied

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  • #9989
    Administrator5
    Keymaster

    Having issues with 2007 Mazda 3. When stopping at stop signs and red lights car shudders when brakes applied. Does not do it when cold but when it warms up. Had transmission fluid, pan, and filter all changed. Still happens. All new rotors and pads with no changes. Shifts and drives very well but acts like it’s not getting something. Air filter changed also. Not heating up but has an odd smell sometimes as well. Any suggestions

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    #10006
    Hostgator
    Member

    From the sound of your problem, this seems more like an engine mechanical problem than a transmission problem.

    You noted that your Mazda 3 isn’t heating up and that there is an odd smell, at times. I would look at the cooling system. Specifically, the thermostat is, more than likely, gone and it is allowing the coolant to flow unimpede through the engine. Proper engine operation requires that the anti-freeze/coolant reach a certain temperature before it is released to the cooling system. If the anti-freeze/coolant doesn’t reach the critical temperature then your Mazda 3 won’t operate properly.

    Like as not, you will find that your Mazda isn’t getting top mileage, as well. And, its performance, as you indicated, isn’t all that good.

    Fortunately, repairing the thermostat is an easy fix because it sits right below system’s pressure cap. Usually, this fix is less than $125.

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