MyTeslaMate
RCM2 family

RCM2_a166_preten2ndRowROpen

Rear right safety restraint system issue

What does the RCM2_a166_preten2ndRowROpen alert mean?

2nd Row Right Seatbelt Pretensioner - Resistance too High

What you'll see in your Tesla

  • Rear right safety restraint system issue
  • Service is required

What triggers it

There is a high resistance with the second row right-side pretensioner.

When it clears

The high resistance is rectified.

Potential impact

The Second Row Right Pretensioner 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.