Service bulletins for the 2025 Mazda Mazda3
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
153 on file from NHTSA, as of 2026-10-19.
About P1738 on the 2025 Mazda Mazda3: what the code means, and the bulletins and recalls about the same components.
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Only bulletins with trouble code: P1738 are shown. Show all
| 05-001-25a | 2025-12-04. Service bulletin. POWER TRAIN. Some customers may see the A/T warning light on during (or immediately after) engine start-up with DTCs P073D:00-TCM / P1738:00-TCM stored. P073D:00-TCM: Turbine/input shaft speed sensor: Sensor output range malfunction P1738:00-TCM: Automatic transaxle internal malfunction This concern is caused by improper TCM logic. To eliminate this concern, the TCM control software has been modified to change the DTC detection logic, preventing DTC judgment during start-up. |
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The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.