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April 28, 2023 Service bulletin

In-Vehicle Network Malfunction error message

Mazda technical service bulletin SA-027-23 for 2021-2023 Mazda MAZDA3, 2021-2023 Mazda CX-5 and 2021-2023 Mazda CX-9 and others.

Bulletin number
SA-027-23
Component
Electrical system
Summary
In-Vehicle Network Malfunction error message. DTC U3000:04 (Telematics communication unit internal malfunction) stored. NOTE: The vehicle does not apply to 09-001/23 because CSP04 is not "OPEN".

Owners of these vehicles have filed 81 complaints in the electrical category.

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