Audio System - Various Malfunctions
SI B 65 07 02Sound System, Cruise, Alarms, Monitors
November 2002
Service Engineering
SUBJECT
Various Problems with BM53 Board Monitor Radio
MODEL
B39, B46, B53 with BMW Board Monitor Radio BM53 (option 609),
Production date from September 2001 to August 2002
SITUATION
There are various complaints with the BMW Business BM53 Board Monitor Radio:
1. When the radio is switched off at the on/off rotary knob before the ignition is turned of{ the last tuned station will not be stored. The first frequency on the band will be stored.
2. The volume in cassette mode is higher than in other modes.
3. A short crackling noise may occur before or afier a navigation announcement.
4. The function "SCAN" does not scan all possible radio stations, stops when the first radio station is found.
5. When the radio is switched off by using the on/off rotary knob while it is in cassette mode, the cassette drive is still running and does not stop until the ignition is turned off.
CAUSE
Software error in the BMW Business BM53 Board Monitor Radio SW # 6.3 and 7.0
PROCEDURE
On a customer complaint basis only, replace the BMW Business BM53 radio
Please refer to the Repair Instructions "Removing and Installing/replacing radio receiver", RA 65 11 055.
PARTS INFORMATION
WARRANTY INFORMATION
Covered under the terms of the BMW New Vehicle Limited Warranty.