BMW TSB #651211
2011 BMW 528
Affected Component: EQUIPMENT ADAPTIVE
- Replacement HiFi Amplifier Is Not Recognized by ISTA and ISTA/P. INFORMATION When installing the new style HiFi amplifier (replacement part), the following conversion must be performed in ISTA/P: Conversion replacement HiFi loudspeaker system Note: This conversion option is only available in ISTA/P prior to the first new style HiFi amplifier installation in the affected vehicle.