Hi,
I have a 2010 Nissan Maxima SV and the old owners blue tooth keeps reappearing, even if I delete it. It is gone while the car is running and I add my phone. Everything works fine. When I shut the car off and restart it, the old blue-tooth settings and old owners phone are back. It also happens to the clock resets from daytime savings and the stereo turns on loud every time I start the car. I even tried removing the battery cables for 10 minutes and the old settings were back.

I am wondering if it has something to do with the key FOB.

Any help would be appreciated.

 

Helllo @photonaddict
I think it could be the result of a malfunctioning internal memory module or a software glitch. Try a hard reset of the car's multimedia system.
Let me know about the result.