MyTeslaMate
VCLEFT family

VCLEFT_a172_SPI_MIA

Parking brake functions degraded

What does the VCLEFT_a172_SPI_MIA alert mean?

The communication link between Electronic Parking Brake (EPB) and Electronic Parking Brake Monitor (EPBM) is not functioning as expected.

What you'll see in your Tesla

  • Parking brake functions degraded
  • Parking brake may not apply or release

What triggers it

Either the Cyclic Redundancy Check (CRC) check has not completed as expected, or a message has not been received for 100ms. Alert disabled during over-the-air (OTA) firmware updates.

When it clears

Communication between Electronic Parking Brake Monitor (EPBM) and Electronic Parking Brake (EPB) has resumed.

Potential impact

Electronic Parking Brake will not apply or release.

Affected models

Cybertruck Model 3 2017-2023 Model 3 2024+ Model S 2021+ Model X 2021+ Model Y Model Y 2025+

Track your Tesla's alerts automatically

Alerts like this reach MyTeslaMate through your car's Tesla telemetry API. MyTeslaMate logs every alert your Tesla reports and turns it into readable history and real-time notifications — hosted TeslaMate with no server to run.