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    Does the 3rd generation of the Mazda 6 have unreliable in transmission?

    Mazda Mazda Advice Mazda 6 Mazda 6 Advice Mazda 6 2021

    Are 3rd generation Mazda 6s unreliable in terms of their transmission?

    Answered by CarsGuide
    17 September 2021
    David Morley

    Mazda’s 6 has always had a pretty good reputation in the trade for its reliability and durability, but globally, there have been a few concerns with the automatic transmission. The first of those is a situation where the transmission goes into limp-home mode. At that point, it can suffer slurred shifts and a lack of acceleration. It doesn’t seem a common complaint in Australia, but it’s reckoned to be caused by the transmission fluid becoming contaminated with small iron particles (possibly swarf from the production process) becoming attracted to the magnetic sensors inside the transmission. At that point, the sensors lose the plot and the information going to the computer becomes garbled.

    The other thing seen (mostly in the US) has been a whining noise from the transmission. Inspections have shown this to be caused by a damaged bearing in the transmission, possibly the victim of misalignment of the gearbox casing. Again, it’s not a common fault showing up here.

    Overall, the Mazda 6 seems one of the better bets out there in reliability terms.

    Disclaimer: You acknowledge and agree that all answers are provided as a general guide only and should not be relied upon as bespoke advice. Carsguide is not liable for the accuracy of any information provided in the answers.
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