MyTeslaMate
IDB family

IDB_a127_brakeFluidLevelInvalid

Brake fluid level sensor service required

What does the IDB_a127_brakeFluidLevelInvalid alert mean?

Brake fluid level signal measured by the Integrated Dynamic Brake (IDB) is invalid.

What you'll see in your Tesla

  • Brake fluid level sensor service required
  • Schedule service

What triggers it

The brake fluid level sensor (IDB connector pins 20, 38) is detected to be disconnected for over 5 seconds.

When it clears

THe Integrated Dynamic Brake (IDB) receives a normal bake fluid level signal for over 5 seconds.

Potential impact

Brake Traction Control (BTC), Vehicle Dynamics Control (VDC), Controlled Deceleration via Parking brake (CDP), Brake Disc Wipe (BDW), and External Brake Request (EBR) may be unavailable. The IDB may be unable to monitor brake fluid level. The vehicle should be driven with extreme caution.

Affected models

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.