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Copied from another forum - this is translated from a BMW December 2020 PUMA in German. The G10 & G11 don’t seem to be effected but that seems strange when problems are being experienced !
H/K Bass and Audio Failure ‘20 / ‘21?
PUMA as of Dec 2020 for the failing H/K system with bass / sound drops. This is translated from German. A Service Bulletin should be making its way soon to the U.S. This affects a lot of models.
The PUMA measure for this is: DE 65463809-01 - 17.11.20
Only vehicles with the following special equipment (SA) are affected: ... F40, F44, F90, G01, G02, G08, G20, G21, G22, G28, G29, G30, G31, G32, G38,
With the two special equipment (optional extra):
SA 6U3 BMW LIVE COCKPIT PROFESSIONAL AND S-0688 HARMAN / KARDON SURROUND SOUND SYSTEM
A diagnosis must be carried out in the event of a customer complaint. If the fault memory entry in control unit RAM01: B7F480 - Booster no connection is present and no other cause can be found: (For example loudspeaker noises or background noises originating from the end device ), the control device is: Replace amplifier Top-Hifi-System with the following part number: 65 12 5 A38 AB8 amplifier top hi-fi system
!Important:! The change index must be checked before installing the part number. The new spare part must have the change index AI-02 or higher.
Only with these can it be excluded that the customer complaint will recur.
!Info:! The control unit amplifier Top-Hifi-System 65 12 5 A38 AB8 with AI-02 is expected to be available from December / 2020.
Only applies to vehicles with the production period: from March 1st, 2020 to November 1st, 2020
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