B1520 on the 2023 Mazda CX-50
The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.
This code is specific to a manufacturer and is not described here. Its meaning is in the manufacturer's service information.
| 09-002-23 | 2023-02-02. Service bulletin. Some customers may complain that the front seat warmers are inoperative or cannot be turned OFF and DTC B1520:49 may be stored. This may be caused by an electrical noise of the front seat warmer control unit. To correct this issue, the anti-electric noise performance of the front seat warmer control unit has been improved. |
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1 on file from NHTSA, as of 2026-10-19. See them in the bulletin list. A bulletin lists model years: read the document for which vehicles it concerns.