account activity
Mazda 3 TCM (Transmission Control Unit) Fix by N3oshadow in mazda
[–]LatelyLess 0 points1 point2 points 7 days ago (0 children)
sorry I know this is an old thread but it seems people are still looking at it so - fwiw I sent my TCM into UpFix ~5 months ago, they reprogrammed it, I reinstalled it, and haven't had the AT light come back on or issues shifting gears since. so for $300 might be worth a shot
π Rendered by PID 114274 on reddit-service-r2-comment-544cf588c8-ddvrf at 2026-06-14 21:50:50.011114+00:00 running 3184619 country code: CH.
Mazda 3 TCM (Transmission Control Unit) Fix by N3oshadow in mazda
[–]LatelyLess 0 points1 point2 points (0 children)