What is the reason why the BMW car is connected to music but there is no sound?
3 Answers
One possible reason why a BMW car is connected to music but there is no sound could be that the phone is in silent mode. Introduction to Bluetooth: Bluetooth technology is a global specification for wireless data and voice communication. It is based on low-cost, short-range wireless connections, providing a special short-range wireless technology connection to establish communication environments for both fixed and mobile devices. In-car Bluetooth entertainment system: The in-car Bluetooth entertainment system mainly includes USB technology, audio decoding technology, Bluetooth technology, etc. By integrating these technologies and utilizing the car's internal microphone, speakers, etc., it can play various audio files stored in a USB drive, as well as access phonebooks. It also adds features like playing popular music.
I've encountered this issue quite a few times. Friends often complain that their BMWs connect to Bluetooth music but produce no sound. It could be due to several simple reasons: the Bluetooth pairing wasn't completed stably, and while the phone shows as connected, the audio output might not actually be activated; the car's volume control knob is set too low or the mute function is turned on, especially since there's an independent music volume adjustment in the BMW iDrive system menu that needs checking; the wrong input source is selected, such as still being in FM or CD mode instead of switching to Bluetooth; insufficient app permissions on the phone—iOS users need to ensure media permissions are enabled, while Android users need to allow audio sharing; minor software glitches, which can usually be resolved by restarting the car's system or the phone; deeper issues might involve a failed amplifier module or a blown fuse, affecting the entire audio system. It's best to test the connection before daily drives, restart if any abnormalities are found, and if the problem persists, visit a 4S store promptly to check the hardware to avoid ruining the mood of your journey.
I often deal with such BMW audio issues in the workshop, and the lack of sound when connected is mostly caused by minor mistakes. You should first confirm that your phone's Bluetooth is indeed successfully paired and playing music; adjust the main volume button in the car to above 60% to ensure it's not accidentally muted; check if the correct Bluetooth option is selected as the input source, as the BMW system occasionally reverts to the default source. Then, try disconnecting and reconnecting or test with another phone to rule out device issues. If none of the above works, it's likely a poor Bluetooth module connection or a blown fuse, especially check the status of audio-related fuses in the fuse box. Updating the car's infotainment system at the software level might fix compatibility errors; otherwise, it could involve amplifier damage, which requires professional equipment for diagnosis. Develop a habit of quickly checking the audio before driving to avoid frustration during long trips.
