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I had my 2016 with a v. 2.3 head unit running ID4 coded to ID6 with Apple Car Play. The system froze and crashed repeatedly, and the backup camera was intermittent. These older head units only have 2GB of memory and can’t handle all the data. The newer head units have 4GB of memory. To resolve the problem I had my head unit coded back to ID4. Then I bought a v.4.1 head unit from eBay (Straight Six auto parts) and had it coded by bimmer-remote.com. Everything works.
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