2021 Mazda CX-5 electrical system problems
12 owner complaints filed with NHTSA name the electrical system on the 2021 Mazda CX-5 — 9% of all complaints for this model year.
What owners report
“The vehicle's Connectivity Master Unit (CMU) suffers from a severe, persistent electronic hardware malfunction that causes the central information display and dashboard telemetry to blink, cycle, and drop signals erratically. This specific hardware architecture failure threatens to corrupt data…”
filed Jul 16, 2026
“Radio audio randomly stopped working and you have to disconnect the negative or you have to leave the car off essentially all night. It’s definitely unknown issue there’s videos all over YouTube about it and there’s forms on read about it.”
filed Nov 16, 2025
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related service bulletins
This Service Alert supersedes the previously issued SAs listed below. The changes are noted in Red text. SA-017/25 12/16/25, 09/08/25, 07/14/25, 05/15/25 and 03/21/25 DESCRIPTION Mazda Connect Frequently Asked Questions…
SA-042-26 · Service Bulletin/Repair Instructions · issued Jul 1, 2026This bulletin supersedes the previously issued bulletin(s) listed below. The changes are noted in Red. 09-012/21 12/13/21, 06/10/21 and 04/27/21 DESCRIPTION Some customers may experience all of following symptoms: The…
09-019-26 · Service Bulletin/Repair Instructions · issued Jun 18, 2026This SA supersedes the previously issued bulletin(s) listed below. The changes are noted below in Red. SA-027/26 04/16/26 DESCRIPTION The Mazda DCA-8000 is required for all warranty battery testing. If the Mazda…
SA-027-26a · Service Bulletin/Repair Instructions · issued Jun 17, 2026DESCRIPTION Some customers may complain about any of the following: 1. Infotainment Center Display does not provide the Authorization Code (OTP) during the MyMazda App Connected Vehicle enrollment. 2. Remote function(s)…
SA-0-38/26 · Service Bulletin/Repair Instructions · issued Jun 16, 2026This Service Alert supersedes the previously issued SA listed below. The changes are noted in Red text. SA-012/25 10/06/25, 08/21/25, 05/15/25 and 02/27/25 DESCRIPTION Customers having MAZDA CONNECT concerns should have…
SA-039-26 · Service Bulletin/Repair Instructions · issued Jun 16, 2026
Electrical System problems in other CX-5 years
| Year | Reports | Share |
|---|---|---|
| 2025 CX-5 | 5 | 20% |
| 2024 CX-5 | 2 | 5% |
| 2023 CX-5 | 9 | 15% |
| 2022 CX-5 | 6 | 10% |
| 2020 CX-5 | 30 | 29% |
| 2019 CX-5 | 46 | 17% |
| 2018 CX-5 | 29 | 8% |
| 2017 CX-5 | 44 | 30% |
| 2016 CX-5 | 71 | 14% |
| 2015 CX-5 | 8 | 6% |
| 2014 CX-5 | 132 | 35% |
| 2013 CX-5 | 58 | 30% |
Other reported problem areas on the 2021 Mazda CX-5
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.