MyTeslaMate
BMS family

BMS_w163_SW_Contactor_WOT_Count

Service is required

What does the BMS_w163_SW_Contactor_WOT_Count alert mean?

The battery management system (BMS) has detected that contactors have undergone stress from a wide-open throttle (WOT) event.

What you'll see in your Tesla

  • Service is required
  • Schedule service

What triggers it

The BMS detects that contactors have undergone stress from a WOT event.

When it clears

The BMS detects that the condition clears.

Potential impact

This alert is primarily informational.

Affected models

Model S 2012-2020 Model X 2015-2020

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.