17 Armada BCI malfunction

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Photo attached: Hi all, wondering if you can validate some info for me or help me to rule in/out a few things.

2017 Nissan Armada with 57k miles. Intermittently, but increasing in frequency, the BCI (backup collision intervention) malfunction and rear sonar lights come on. Blind spot indicator is not illuminating when another vehicle is in blind spot. Is this the notorious brake switch problem? Or a problem with one of the rear sonar sensors?

Nissan groups are suggesting that this is the brake switch issue creeping up; as the light is intermittent and comes on about 1 minute after startup. But those peeps have had trouble even starting their Armada’s then replaced the brake switch to correct the issue. We haven’t had those troubles at all; this thing cranks every time.
What gives?? Brake switch? Or sonar sensor?
 

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