Now, let’s move on to the iDrive head unit faults. The solution in this case is to reflash the head unit. Some radio stations broadcast excessively large files, such as banners, and if the head unit cache is full, the unit will crash and reboot. I know it sounds ridiculous, but it can happen. This will usually happen when you travel and the iDrive needs to load a new map, or when you drive through metro areas. Now, when you add radio stations and mobile phones into the mix, the iDrive can easily crush because of the lack of RAM memory and processing power. The maps are very resource hungry, especially in bigger urban areas. The second most common cause is the navigation map, although the problem is not in the map itself. The next iOS release solved the problem entirely. A few years back when Apple released 11.2.2 iOS the iDrive reboots become the norm. The problem can also be in the cell phone’s software. Also, try to link the cause and effect with other applications, such as clearing the phone’s cache. If the problem persists with a phone connected, try disabling text messages and removing any emojis from the phone name. If the problem has been resolved, you can reconnect the phone. Remove and disconnect all Bluetooth devices and cables connected to iDrive first. These issues typically happen after you change your smartphone or after you update iDrive or your phone. Yes, they have been known for iDrive restart issues in all BMW models. If the iDrive keeps rebooting and hasn’t entered the continuous restart loop, the first thing to rule out is your cell phone.
Let’s go through the most common offenders. Most often, and this is especially true for the MGU and NBT/Evo head units installed in both F and G-Series, the cause of reboots actually comes outside your BMW. So, let’s start with the most common causes that apply to all iDrive generations, and then I’ll go over them individually later. The standard diagnostic test plans frequently fail to solve the problem because there are no fault codes to even begin the diagnostic process. In some cases, the iDrive will reboot once a year, while in others, it will reboot repeatedly. While the symptoms are similar from generation to generation, the causes differ. The reboot issue has followed the iDrive through all generations, beginning with the 2002 E65 7-Series and continuing to the most recent G-Series models.
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