SA-003-22a

Service Bulletin Details

Public Details for: SA-003-22a

Some vehicles may store dtc U0300:57 (body control module (bcm) internal malfunction) after a bcm replacement or mdars bcm software update (not with bcm update for sspc5 or 4621b using mdrt) and the dtc cannot be erased. This is caused by a


- 2021 - 2020 - 2019 -

Models from 2021
2021 MAZDA CX-30
2021 MAZDA MAZDA3
Models from 2020
2020 MAZDA CX-30
2020 MAZDA MAZDA3
Models from 2019
2019 MAZDA MAZDA3 
BULLETIN NOTES
This service alert supersedes the previously issued service alert listed below. The changes are noted in Red text.
Previous SAs:
Date(s) Issued:
SA-003/22
01/21/22
APPLICABLE MODEL(S)/VINS
2019-2021 Mazda3
2020-2021 CX-30
DESCRIPTION
Some vehicles may store DTC U0300:57 (Body control module (BCM) internal malfunction) after a BCM replacement or
MDARS BCM software update (NOT with BCM update for SSPC5 or 4621B using MDRT) and the DTC cannot be
erased. This is caused by a BCM-VCM software error. Mazda is aware of the issue and is working on a resolution. If
there is an issue with this concern, contact Hotline for newest repair information.
• DO NOT perform BCM software update with MDARS until further notice, including CSP06 and CSP07.
• This SA will be updated with the newest repair information as it becomes available.
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02/09/2022 08:20 AM cciz

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