Mirai Keyless Entry Failure

I had a similar experience with my previous Tesla Model S. The symptoms you are describing sound a lot like what I experienced. Have you had any diagnostics performed to check the individual door handle sensors, or just a general scan?

Diagnostic was pretty generic - just pointed to a fault in the door handle circuit. You think it’s worth digging deeper into the Tesla experience? I'm wondering if there something in specific with the electronics that I can check before I surrender to the stealer shop??

In my situation, the fault was eventually traced to a defective connection within the door wiring harness. Although I am not familiar with the Toyota Mirai, I would recommend seeking expert assistance from a qualified workshop equipped to diagnose this issue effectively. That's usually the best starting point.

Took it to the workshop, and you nailed it! A cable connector within the door was indeed defective. Apparently, moisture got in there and corroded the pins. 95€ later and keyless is back! Thanks a bunch for the pointer!