Z4m Intermittent raido / throwing codes

[1armybrat]

Hello newbie z4m owner.
I put 126 miles on my new to me 2006 z4mr(61Kmiles)
later in the day the radio intermittently started shutting off . At the same time the attached codes appears. This happen several times. Today it repeated the same. This time the raiio stayed off and the codes stayed up. After turning the engine off and on the radio came back on codes off. Any ideas where to start? Thank you in advance.

 

[1armybrat]

To close the loop on this issue.
I wired a digital volt meter to the battery so I could read it while driving. The volt was all over the board. From 12 volt up to 17!
The codes and radio dropped out around 13.5 volts and higher. Guessed at the internal regulator in the alternator.
Replaced the alternator and the problem has been solved. Back to enjoying this sweet ride. I had read that the suspension was a bit rougher on the M's compared to the regular z4. Maybe so. But I have found the ride in the M to be quite comfortable. I have also found it to drive slow and easy as well as it does running hard.