Carefully read: HCE-E109A disk2.3 serial unused 15 years → 17 years 17 years → 19 years Alpine nationwide map data update kit Images are for reference. disk1 program disk used (can be reused if compatible with the navigation system). disk2 serial unused. disk3 serial unused. disk4 serial used (authentication key issued), therefore authentication is not possible. Update not possible. disk5 serial used (authentication key issued), therefore authentication is not possible. Update not possible. disk6 serial used (authentication key issued), therefore authentication is not possible. Update not possible. Free shipping. No claims, 24-hour payment. If there is a defect, use the easy delivery compensation system. There will be no response from our side to prevent swapping. Please refrain from purchasing if you are concerned. Self-promotion content is also a condition (to consolidate updates that affect shipping due to business trips, etc.). Search words (HCE-E108A HCE-E107A HCE-E106A HCE-E105A) ================================================================================================================= The manufacturer sells assuming one set per navigation system, so we generally do not answer questions about irregular use (using other disks on a different navigation system). However, we, or our family, have many Alpine navigation systems (dozens of vehicles), and we have a lot of experience with authentication and installation using unused serial numbers from different sets. For example, it's possible to update a 21-year version of the navigation system EX11Z to a 25-year version, or a 16-year version of the navigation system EX10V to a 21-year version with one set instead of buying two. It's not that the serial numbers can be "reused," but rather that they have been "used differently." This is not the intended use, and of course, there is no manufacturer's warranty, nor is there any update guarantee from us. If you are concerned, please buy a new one. Regarding the update method, insert the disk and scan the two-dimensional code required to issue the authentication key with your smartphone. Your navigation system model number and the 16-digit map management number will be automatically reflected on your smartphone. Then, just enter the 16-digit serial number from the back of the manual.