Service bulletins for the 2024 Mazda CX-90
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.
552 on file from NHTSA, as of 2026-10-19.
About P0504 on the 2024 Mazda CX-90: what the code means, and the bulletins and recalls about the same components.
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Only bulletins with trouble code: P0504 are shown. Show all
| 01-001-24a | 2024-02-01. Service bulletin. SERVICE BRAKES, HYDRAULIC. Some vehicles may exhibit check engine light turns on with DTC P0504:00 [PCM] (Brake switch circuit problem) stored in memory. This may be caused by the PCM incorrectly reading the brake switch input. To eliminate this concern, the control software of the PCM has been modified. |
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| 01-001-24 | 2024-02-01. Service bulletin. SERVICE BRAKES, HYDRAULIC. Some vehicles may exhibit check engine light turns on with DTC P0504:00 [PCM] (Brake switch circuit problem) stored in memory. This may be caused by the PCM incorrectly reading the brake switch input. To eliminate this concern, the control software of the PCM has been modified. |
| SA-062-23 | 2023-11-01. Service bulletin. ELECTRICAL SYSTEM; SERVICE BRAKES, HYDRAULIC. Some customers may experience a "Push Button Start Malfunction. Have the Vehicle Inspected" warning message and the following DTC(s) may be stored. C0040:24 - Brake switch (No.1 signal) circuit malfunction P0504:00 - Brake switch system: Circuit malfunction |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.