2021 Mazda CX-30 electrical system problems

13 owner complaints filed with NHTSA name the electrical system on the 2021 Mazda CX-30 — 13% of all complaints for this model year.

Electrical System complaints

13%

share of all complaints

—

median reported incident mileage

0 / 0

crash / fire reports

What owners report

“Two issues A) my usb or display stop to work often I have reset to make it work again, look like loose electrical 2) many time it has also happened start key malfunction error I have jumped start, I have replaced battery same issue”
filed Sep 16, 2025
“As reported by others, Engine Malfunction light came on. Car running rough. Mazda dealer says corroded wiring harness and $5k to replace. They bypass the conventional repair and splice it in. Within a hour of driving after pick up, same engine malfunction light and rough running returns. This time…”
filed Feb 24, 2025

Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.

This Service Alert supersedes the previously issued service alert listed below. The changes are noted in Red text. SA-038/26 06/15/26 DESCRIPTION Some customers may complain about any of the following: 1. Infotainment…
SA-038-26a · Service Bulletin/Repair Instructions · issued Sep 4, 2026
This Service Alert supersedes the previously issued SA(s) listed below. The changes are noted in Red text. SA-039/26 06/15/26 Mazda Connect Symptom Troubleshooting DESCRIPTION Customers having MAZDA CONNECT concerns…
SA-039-26a · Service Bulletin/Repair Instructions · issued Aug 19, 2026
DESCRIPTION Some customers may complain that the electric power steering warning light illuminates after engine start and DTC U2011:1C is stored. Zinc-plated whisker may form inside the EPS motor and trigger the DTC…
06-001-26 · Service Bulletin/Repair Instructions · issued Jul 8, 2026