Hello Everyone,
I have a 2006 BMW 530i. I've had this car for some time now and just about 2-3 weeks ago I noticed an issue with the radio whenever I start up the car. So what happens is that the radio would began to play as soon as I turn on the car and within 5-10 seconds it starts making a weird popping syncing noise and as it is doing that the iDrive starts to malfunction where it delayed in response time. After the iDrive stalls for some time(3-7min approx.) and then it would restart it self and just keeping doing that periodically without me even touch the iDrive buttons. In addition, something else that happens is the seatbelt noise indicator would making popping noise if I don't have a seatbelt on. Normally the seatbelt noise indicator is how any new BMW would sound. However in some cases I can start up the car and the radio works fine without making any noise but as I turn the car off and back on it will go back to the same process of stalling and making noise. For example, if I was to go to Walmart the radio work upon return from Walmart the radio would not work. Some things that I have checked so far was the radio fuse which appears to be in tact. I have tried to disconnect the batter for up to 5 min and reconnect same issue. I disconnected the amp located on the left side of the trunk and same issue persisted. At this point I'm not sure if getting a aftermarket radio would resolved the issue but it is extremely annoying. I need some help. Any suggestions???

 

It sounds like a compound issue (idrive and amp related). Did it happen all at one time or gradually got worse

 

Gradually gotten worse.

 

Unplug your TCU on the driver side in the trunk to see if it goes away. You're looking at either the amp or TCU creating the sound issue.