[OneWhite35]

One more thing to add - as I mentioned in my original post, my battery needed to be replaced too. I've read some horror stories where the FRM failed after disconnecting/reconnecting the battery, so I expressed concerns to the dealership that there may be a risk that the FRM will fail again when I replace my battery. After they had diagnosed the issue as the FRM and confirmed that they will replace it under warranty, I called to ask if I can go to the dealership to replace my battery before they replace the FRM. They said I could, but the tech had already disassembled my car and I could not do it on the dealership premises. Long story short, the service manager said they would just do the battery replacement process for me in case anything goes wrong. My new battery was in the trunk at the time and they replaced + registered my new battery for free along with the FRM replacement.

I would say replace your battery first and register before taking it into the dealership.