TSB SA-012-26B — Mazda Service bulletin
SA-012-26B is a service bulletin on file with NHTSA for the Mazda Mazda3, 2024–2026 model years. A TSB is factory repair guidance, not a recall — the repair is not automatically free.
What the bulletin says. Some customers may experience a message "TCU Malfunction. Have the Vehicle Inspected" in the instrument cluster. Additional symptoms that may occur: Connected Vehicle One Time Passcode (OTP) may fail. • Connected Vehicle Remote functions may fail. • The following DTC's may be…
NHTSA's own summary of the document, quoted from the public manufacturer-communications file.
Vehicles and model years SA-012-26B names
| Vehicle | Model years |
|---|---|
| Mazda Mazda3 | 2024, 2025, 2026 |
Every document filed under SA-012-26B
| Document ID | Filed | Type |
|---|---|---|
| SA-012-26b | April 18, 2026 | Service bulletin |
What SA-012-26B covers
Electrical — the component vocabulary NHTSA files this communication under.
Questions buyers ask
What is TSB SA-012-26B?
SA-012-26B is a service bulletin filed with NHTSA by Mazda, covering the Mazda Mazda3 across the 2024–2026 model years. NHTSA's summary reads: Some customers may experience a message "TCU Malfunction. Have the Vehicle Inspected" in the instrument cluster. Additional symptoms that may occur: Connected Vehicle One Time Passcode (OTP) may fail. • Connected Vehicle Remote functions may fail. • The following DTC's may be…
Which vehicles does SA-012-26B cover?
NHTSA's file names Mazda Mazda3 (2024–2026). A bulletin number can be re-issued against more vehicles later, so check the model-year list on this page against your own.
Is TSB SA-012-26B a recall, and is the repair free?
No. SA-012-26B is repair guidance the manufacturer sent its dealers, not a safety defect finding. You pay for the work unless the vehicle is still under warranty. Recall repairs, by contrast, are always free.
How do I get the full text of SA-012-26B?
Take the document ID to a dealer's service desk, or search NHTSA's manufacturer-communications records. This page carries every document ID filed under SA-012-26B, its date, and NHTSA's own summary from the public file.
Every number on this page is a count of records in the federal complaint, recall, and investigation files published by NHTSA's Office of Defects Investigation. This page lists only what NHTSA's manufacturer-communications file records under SA-012-26B. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.