For 2010-2011 Mazda 3 2.0L 2.5L TCM TCU Transmission Control Module L539189E1HSpeed-Autoparts-Usa Introduction:Speed-Autoparts-Usa has been providing the quality products in automotive parts & ...
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Transmission Control Module (TCM) faults are not unknown on these early Mazda 3s. Symptoms usually involve erratic shifting, a failure to select gear at all and having the car go into limp-home mode.