This Service Alert supersedes the previously issued SA(s) listed below
Mazda technical service bulletin SA-012-26c for 2024-2026 Mazda MAZDA3, 2024-2026 Mazda CX-90 and 2024-2026 Mazda CX-30 and others.
- Bulletin number
- SA-012-26c
- Component
- Unknown or other
- Summary
- This Service Alert supersedes the previously issued SA(s) listed below. The changes are noted in Red. SA-012/26 04/17/26, 03/04/26 and 02/26/2026 DESCRIPTION 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 stored: B1252:87-8B:TCU - COMMUNICATION ERROR WITH CONNECTIVITY MASTER UNIT (CMU) U0198:00-03:CMU - COMMUNICATION ERROR WITH EMERGENCY CALL UNIT/TELEMATICS COMMUNICATION UNIT REPAIR PROCEDURE 1. Verify the concern. 2. Check if any of the following DTCs are stored: B1252:87-8B:TCU - COMMUNICATION ERROR WITH CONNECTIVITY MASTER UNIT (CMU) U0198:00-03:CMU - COMMUNICATION ERROR WITH EMERGENCY CALL UNIT/TELEMATICS COMMUNICATION UNIT
Vehicles covered
- Mazda MAZDA3 2024-2026 202420252026
- Mazda CX-90 2024-2026 202420252026
- Mazda CX-30 2024-2026 202420252026
- Mazda CX-50 2025-2026 20252026
- Mazda CX-90 Plug-In Hybrid 2024-2026 202420252026
- Mazda CX-70 2025-2026 20252026
- Mazda CX-50 Hybrid 2025-2026 20252026
- Mazda CX-70 Plug-In Hybrid 2025-2026 20252026
VIN decoder
See the problems and recalls for an exact car
Buying a used Mazda MAZDA3?
Check the exact car before you pay: accidents, salvage or flood titles, odometer readings and previous owners.
Check its history