BMW E46 / E39 models conversion / upgrade to Bluetooth standard A2DP
Unfortunately, the technical upgrading and conversion of the E46 and 39 series ended with the end of production of these series. For this reason, BMW did not offer any further upgrades for these series for conversions from technical standards introduced afterwards, since this does not make economic sense from BMW’s point of view, since these vehicles were made for BMW AG after the introduction of the successor model, the 3-series E90, E91, E92 and E93, as well as the 5 series E60 / E61 “old vehicles” that were based on a newly introduced on-board communication, initially the CCC and later the CIC. From then on, the connection of these AUDIO / MEDIA integrations was no longer transmitted via the devices that were also integrated in the CAN BUS, but these devices and components were interconnected with fiber optic cables in the so-called own MOST ring, which is only used for media applications , networked. The CCC or later CIC serves as the so-called “master” in this system, since the necessary data exchange with other control units that are integrated in the CAN or LIN bus, for example, provides these control units with direct transmission / forwarding of the information to other buses systems available, eg. The speed signal for increasing the volume.
The BMW X3 of the first generation (E83 series), which is based on the basis (electronic platform) of the E46 and was built from 2003 to 2010, still got a Bluetooth module with the newer A2DP standard in the last models. Most people don’t know that it is therefore possible to retrofit the newer A2DP standard in the E46 or E39 by subsequently replacing this control unit, which BMW calls the “hands-free charging device”. Vehicles that have the “hands-free charging device” with the BMW part number 84 21 6 931 845 can be converted to the newer A2DP standard by simply replacing it with a “hands-free charging device” with the BMW part number 84 10 9 154 358, so that mobile devices such as For example, the SAMSUNG GALAXY S10 or later models can be used, but only for the hands-free system and not for streaming AUDIO or VIDEO applications.