MyTeslaMate
RCM2 family

RCM2_a878_headAB3rdRowLCrossC

Rear 3rd row left safety restraint system issue

What does the RCM2_a878_headAB3rdRowLCrossC alert mean?

3rd Row Left Head Airbag - Cross coupled

What you'll see in your Tesla

  • Rear 3rd row left safety restraint system issue
  • Service is required

What triggers it

There is a cross coupling with the 3rd row left head airbag.

When it clears

The cross coupling is rectified.

Potential impact

The 3rd row left head airbag may not perform as designed.

Affected models

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

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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.