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Mark44 Mark44 is offline
Slightly Knowledgeable
 
Join Date: May 2021
Location: Western Washington
Posts: 70
Garage
I was pleasantly surprised to find that when I disconnected my battery in my '09 997.2 C2S to replace all four door speakers, I didn't have to reset the radio memory with my preferred stations, nor did I have to "retrain" the windows. I had the battery disconnected twice -- once for four days for the driver's side speakers, and the second time just for a day for the passenger side speakers. The only thing I noticed was a notification that PSM (or maybe it was PASM?) had failed, but that was just a result of the battery being disconnected, I believe, and there have been no further notifications.

I would imagine that for the OP's 991.1 car, the situation would be similar.
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2009 Porsche 911 C2S, 2002 Porsche C2S (traded)
Old 03-25-2023, 06:39 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #14 (permalink)