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Pulled this from another forum
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SERVICE BULLETIN NUMBER: 08-057-12
GROUP: Electrical
DATE: October 11, 2012

SUBJECT:
Flash: RBZ Or RHB Radio Software Enhancements
OVERVIEW:
This bulletin involves upgrading the software on the RBZ or RHB Radio.
JEEPCMODELS:
2012 (JK) Wrangler
2012 (WK) Grand Cherokee
2012 (KK) Liberty
NOTE: This bulletin applies to vehicles equipped with Media Center 430
CD/DVD/MP3/HDD (sales code RBZ) built before November 29, 2011 (MDH
1129XX) or Media center 430N CD/DVD/MP3/HDD/NAV Radio (sales code
RHB).
SYMPTOM/CONDITION:
The customer may experience one or more of the following conditions.
•Digital photos loaded onto the hard drive intermittently get lost (RBZ & RHB).
•CD/DVD will not play (RHB only).
•Navigation accept screen will not clear (RHB only).
•Navigation shows “acquiring signal” for an extended period of time (RHB only).
•New navigation graphics (RHB only).
 
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