I have only had them for a month, but so far so good. I have been on some pretty obscure roads and they are on the map. Although the POI doesn't have my two local ski resorts, which are pretty big and pretty old. I am not sure if thats a knock off thing or if they are just excluded on BMW's software anyway. My 2014 knock off disc was the same and worked well aside from that. For $15 I am happy.

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03 3.0i mt
89 325is