Is your Mazda 3 not shifting correctly, maybe even stuck and won't shift into R or D? It could be your transmission control module (TCM) has failed. I'll show you some symptoms of the issue, and how to replace the TCM.

Index:
0:00 Intro
0:21 Dash symptoms and code
0:46 Moving a car with failed TCM
1:12 Battery removal
2:36 Battery box removal
4:53 Transmission mount loosening
5:22 TCM removal
7:15 Old/new TCM comparison
7:49 TCM installation
9:15 Transmission mount securing
9:37 Battery box installation
12:01 Battery installation
13:24 Dash readout after TCM replacement
13:36 Closing remarks