Audio System - RAD2(R) Volume Fluctuation

SI B 65 23 09
Audio, Navigation, Monitors, Alarms, SRS

July 2009
Technical Service

SUBJECT
RAD2: Audio Volume Fluctuates

MODEL
E82, E88 *(1 Series) from start of production

E90, E91, E92, E93 *(3 Series) from 09/2007

*with option 663 (Radio Professional, RAD2) and option 677 (HIFI System Professional)

SITUATION
In all audio modes (radio, CD, AUX-In, etc.), the audio volume fluctuates and is distorted if the bass is turned up.

The situation occurs if the vehicle is moving or standing still.

CAUSE
Coding issue in the RAD2 radio

CORRECTION
Do not replace parts!

Encode the RAD2 radio individually using ISTA/P 2.33.1 or later.

Note that ISTA/P will automatically reprogram and code all programmable control modules that do not have the latest software.

For information on programming and coding with ISTA/P, refer to CenterNet / Aftersales Portal /Service / Workshop Technology / Vehicle Programming.

WARRANTY INFORMATION





Covered under the terms of the BMW New Vehicle Limited Warranty.





Disclaimer