New TSB - Overheating audio amp*
*early cars with option 752 (INDIVIDUAL AUDIO SYSTEM)
The amplifier for the M Individual Audio System overheats and turns off. The affected amplifiers are not equipped with a cooling fan. (Vehicles produced up to March 2008)
Install an improved amplifier (including a cooling fan) for the M Individual Audio System.
65 12 7 842 409 - Amplifier for M Individual Audio System
--per BMW_tech on Bimmerfest
Lake Oswego, Oregon, USA
2015 M4 Coupe